Alloy & Other Metals

(1) 1.6511 Alloy Steel Rod Refers To The Corresponding Steel Number China GB steel number 40CrNiMoA, German DIN steel number 36CrNiMo4, German DIN material number 1.6511, French NF standard 40NCD3, Japanese JIS standard SNCM439, British BS standard 816M40, American AISI/ASTM4340, American UNS standard G43400. (2) 1.6511 Alloy Steel Rod Chemical Composition C:0.37-0.44 Si:0.17-0.37 S：≤0.035 P:≤0.035 Mn:0.50-0.80 Cr:0.60-0.90 Mo:0.15-0.25 N:1.25-1.65 (3) 1.6511 Alloy Steel Rod Surface Treatment Plate: Origin Black, Orign cold rolled bright, Machined, Grinded Bar:Origin Black, Orign cold rolled(drawn) bright, Turned, Peeled, Grinded (4) Charateristics 4340 steel offers toughness and high strength inthe heat treated condition, with in roun , d bar 4340 is available fully certified and suitable for applicat , ions  requiring a quality tensile alloy steel.AISI 4340 is commonly supplied quenched and tempered with a hardness of between 24 to 29HRc (5) Contact us Feel free to contact us,we are glad to serve for you. Songshun Always Open the Door for You. MiKi Zhuo Skype/Whatsapp/Wechat:+86-18269260283 A , DD:No.4 Dongda Street, Shatou, Changan Town, Dongguan City, Guangdong Province, P.R.C China songshunmoldsteel41404340

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Description of 4340 chromoly steel:4340 alloy steel is an iron-based alloy containing nickel, chromium and molybdenum. The relatively high carbon content gives this alloy exceptional strength in applications where severe service conditions exist.4340 alloy steel has high strength, good toughness and good ductility. In addition, the alloy is not prone to embrittlement. 4340 steel application: It is used as important quenched and tempered parts that require good toughness, high strength and large size, such as heavy machinery and high-load shafts, turbine shafts with a diameter greater than 250mm, helicopter rotor shafts, turbojet engine turbine shafts, blades, high Loaded transmission parts, crankshaft fasteners. Gears, etc.; can also be used for rotor shafts and blades whose operating temperature exceeds 400 °C; can also be used to manufacture important parts with special performance requirements after nitriding treatment, and can be used for ultra-high temperature after low temperature tempering or austempering. Use of strength steel. 4340 Steel Features:It has high strength, toughness, excellent hardenability and stability against overheating, good plasticity and heat resistance, uniform material, high working reliability, weldability, non-leakage, and simple steel structure production. Short construction period and good assembly. 4140 steel processing technology: Heat treatment standard: quenching at 850℃, oil cooling; tempering at 560℃, water cooling, oil cooling; Metallographic structure: tempered sorbite Heat treatment: 1. Normalizing: Heat the furnace to 900°C~930°C, keep the thickest cross section per inch at this temperature for one hour, and cool in air. 2. Heat to austenitizing at a temperature of 860℃~885℃, and keep the thickest cross section per inch for one hour at this temperature 3. Normalizing or oil quenching, and cooling to a maximum temperature of 121°C 4. Temper at a temperature that achieves the following mechanical properties. The thickest cross-section per inch is held for one hour at the tempering temperature, and the tempering temperature range is 640 ° C ~ 680 ° C 5. For each heat treatment process, a heat treatment chart must be drawn. 6. The mechanical property test shall be carried out in accordance with the stipulations of ASTM. A-370. The sample material used for the test shall be cut from the test bar of the same furnace steel. The casting or forging represented by the sample and the test bar shall be in the same furnace. The test bar shall be heat treated in the same furnace together with the charge. 7. The mechanical properties should meet the following requirements: (Tested with a test bar, sampling according to APT 6A, 110K standard) - Tensile strength minimum lb/inch (862) Yield strength minimum lb/inch 110.000 (758) 2 inches The minimum value of elongation is 15% and the minimum value of section shrinkage rate is %40. Brinell hardness HB285 ~ take, the casting or forging represented by the sample and the test bar must be in the same furnace, and the test bar should be heat treated in the same furnace together with the charge. 8. The mechanical properties should meet the following requirements: (tested with test bars, sampling according to APT 6A, 110K standard) - minimum tensile strength lbs/inch (862) minimum yield strength lbs/inch (758) 2 inches Minimum elongation %15 Minimum shrinkage of section %40 Brinell hardness HB285~352 9. Marking: Each part shall be printed with heat treatment marks and hardness with low stress steel stamp. Company Overview Established in 2009,Songshun Steel supplies a wide range of carbon, alloy and tool steel products, including high speed tool steel, cold work tool steel, hot work tool steel, plastic mould steel, engineering steel and machine structural steel etc. After more than 10 years development and growing, Songshun Steel becomes one comprehensive special steel factory, stockist and exporter.songshunmoldsteel41404340 ,

Minimum Order: 1 bags

We can supply the products according to customer's drawings, samples and performance requirement.​ 1. Satisfy various technical request. 2. Best delivery time. 3. higher cost performance. 4. OEM, ODM and OBM are welcomed. We can supply the products according to customer's drawings, samples and performance requirement.​ 1. Satisfy various technical request. 2. Best delivery time. 3. higher cost performance. 4. OEM, ODM and OBM are welcomed.

Low alloy steel refers to alloy steel with less than 5% of total alloying elements. Low alloy steel is relative to carbon steel. On the basis of carbon steel, one or several alloying elements are intentionally added to the steel in order to improve the properties of the steel. When the amount of alloy added exceeds the general content of the normal production method of carbon steel, the steel is called alloy steel. When the total amount of alloy is less than 5%, it is called low alloy steel, ordinary alloy steel is generally less than 3.5%, alloy content between 5-10% is called medium alloy steel, and more than 10% is called high alloy steel. China's steel output has exceeded 600 million tons, the quantity of steel is no longer the main contradiction, and the contradiction of unreasonable steel varieties and structure is very prominent. The main task of the current industry is to strive to improve the market competitiveness of products, stand at a new starting point for sustainable development, and make vigorous development of low-alloy steel an important part of the development strategy. Many ordinary steel enterprises have realized that the production of low-alloy steel is the key to improving the technical content and added value of products in the adjustment of the steel variety structure and the preparation of scientific and technological development plans. The management cadres felt that "success is also low-alloy steel, and failure is also low-alloy steel", and they urgently demand a comprehensive understanding of low-alloy steel. The production situation of ordinary low alloy steel in my country can be summarized into the following points: 1. It is low carbon in terms of carbon content, and the carbon content is generally less than 0.20%; 2. In terms of alloys, primary steel and binary steel occupy a large proportion; 3. In terms of supply status, most of them are delivered in hot-rolled state; 4. Many steel grades add rare earth elements to improve the overall performance; 5. Most common low alloy steels are ferrite + pearlite type. Our company Dongguan Songshun Mould Steel Co., Ltd. specializes in the production of alloy steel for more than 10 years, mainly producing various alloy steel products, if you need more price, cooperation or quality information, please notify us jacklu@songshunsteel.com

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Established in 2009,Songshun Steel supplies a wide range of carbon, alloy and tool steel products, including high speed tool steel, cold work tool steel, hot work tool steel, plastic mould steel, engineering steel and machine structural steel etc. After more than 10 years development and growing, Songshun Steel becomes one comprehensive special steel factory, stockist and exporter. Combined with experienced exporting team and professional technical knowledge, Songshun Steel offers both technical advice and support, as well as global professional steel solution and service. Due to satisfactory reliable quality and professional service, Songshun expands our market worldwide, such as Colombia, Chile, Spain, Turkey, Iran, Vietnam, Malaysia ,UAE, Canada, Brazil, Mexico and so on. We offer a wide range of information and high quality steel products on 4140 and 4340 steel, for more information on our 4140 and 4340 steel products, please contact us today. To discuss pricing details, please request a quote. MiKi Zhuo E-mail:jacklu@songshunsteel.com Skype/W , hatsapp/Wechat:+86-18269260283 ADD:No.4 Dongda Street, Shatou, Changan Town, Dongguan City, Guangdong Province, P.R.C China For more 4140 steel product information, please click this link: https://steelpurchase.com/4140-scm440-172 , 25-steel/ songshunmoldsteel41404340

Minimum Order: 2 barrels

With the development of science, technology and industry, higher requirements are put forward for materials, such as higher strength, resistance to high temperature, high pressure, low temperature, corrosion resistance, wear and other special physical and chemical properties. To meet the requirements, alloy steel plates appeared. 1.Alloy Steel Plate Performance Issues With the development of science, technology and industry, higher requirements are put forward for materials, such as higher strength, resistance to high temperature, high pressure, low temperature, corrosion resistance, wear and other special physical and chemical properties. fulfil requirements. The performance of carbon steel mainly has the following shortcomings: (1) Low hardenability Under normal circumstances, the maximum hardenable diameter of carbon steel water quenching is only 10mm-20mm. (2) The strength and yield strength are relatively low. For example, the σs of ordinary carbon steel Q235 steel is 235MPa, while the σs of low alloy structural steel 16Mn is more than 360MPa. The σs/σb of 40 steel is only 0.43, which is much lower than that of alloy steel. (3) Poor tempering stability Due to the poor tempering stability, when carbon steel is quenched and tempered, a lower tempering temperature is required to ensure higher strength, so that the toughness of the steel is low; in order to ensure better Toughness, and the strength is low when the high tempering temperature is used, so the comprehensive mechanical properties of carbon steel are not high. (4) Can not meet the requirements of special properties Carbon steel is often poor in terms of oxidation resistance, corrosion resistance, heat resistance, low temperature resistance, wear resistance and special electromagnetic properties, and cannot meet the needs of special performance properties. 2.The difference between carbon steel and alloy steel plate The performance of carbon steel mainly has the following shortcomings: (1) Low hardenability In general, the maximum hardening diameter of carbon steel water quenching is only 10mm-20mm. (2) The strength and yield strength are relatively low. For example, the σs of ordinary carbon steel Q235 steel is 235MPa, while the σs of low alloy structural steel 16Mn is more than 360MPa. The σs/σb of 40 steel is only 0.43, which is much lower than that of alloy steel. (3) Poor tempering stability Due to the poor tempering stability, when carbon steel is quenched and tempered, a lower tempering temperature is required to ensure higher strength, so that the toughness of the steel is low; in order to ensure better Toughness, and the strength is low when the high tempering temperature is used, so the comprehensive mechanical properties of carbon steel are not high. (4) Can not meet the requirements of special properties Carbon steel is often poor in terms of oxidation resistance, corrosion resistance, heat resistance, low temperature resistance, wear resistance and special electromagnetic properties, and cannot meet the needs of special performance properties. 3.Our Company Established in 2009,Songshun Steel supplies a wide range of carbon, alloy and tool steel products, including high speed tool steel, cold work tool steel, hot work tool steel, plastic mould steel, engineering steel and machine structural steel etc. After more than 10 years development and growing, Songshun Steel becomes one comprehensive special steel factory, stockist and exporter. Combined with experienced exporting team and professional technical knowledge, Songshun Steel offers both technical advice and support, as well as global professional steel solution and service. Due to satisfactory reliable quality and professional service, Songshun expands our market worldwide, such as Colombia, Chile, Spain, Turkey, Iran, Vietnam, Malaysia ,UAE, Canada, Brazil, Mexico and so on. 4.Contact Us MiKi Zhuo E-mail:jacklu@songshunsteel.com Skype/W , hatsapp/Wechat:+86-18269260283 ADD:No.4 Dongda Street, Shatou, Changan Town, Dongguan City, Guangdong Province, P.R.C China Company website: https://steelpurchase.com/ http://w , ww.songshunsteel.com/ songshunmoldsteel41404340 ,

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1.Alloy Tool Steel Round Bar Alloy tool steel is a type of steel in which chromium, molybdenum, tungsten, vanadium and other alloying elements are added on the basis of carbon tool steel to improve hardenability, toughness, wear resistance and heat resistance. It is mainly used in the manufacture of measuring tools, cutting tools, impact- resistant tools, cold and hot molds and some special-purpose tools. Steel with alloying elements such as Si, Mn, Ni, Cr, W, Mo, and V added to carbon tool steel. The addition of Cr and Mn can improve the hardenability of tool steel, and other elements can be added selectively or at the same time according to requirements (the total amount of addition generally does not exceed 5%), that is, a series of alloy tool steels are formed. 2.Category of use The hardenability, hardenability, wear resistance and toughness of gold tool steel are higher than those of carbon tool steel, and can be roughly divided into three categories: steel for cutting tools, molds and measuring tools. Among them, steels with high carbon content (carbon mass fraction greater than 0.80%) are mostly used to manufacture cutting tools, measuring tools and cold work dies. The hardness of such steels after quenching is above HRC60 and has sufficient wear resistance; steels with moderate carbon content ( Carbon content of 0.35%~0.70%) is mostly used in the manufacture of hot work molds. The hardness of this type of steel after quenching is slightly lower, which is HRC50~55, but the toughness is good. The cutting tool produces strong wear and heat under working conditions, as well as vibration and a certain impact load. Steel for cutting tools should have high hardness, wear resistance, red hardness and good toughness. In order to ensure its high hardness and meet the needs of forming alloy carbides, the carbon content in steel is generally 0.80% to 1.45%. Chromium is the main alloying element of this type of steel, and its mass fraction is generally 0.50% to 1.70%. Some steels also contain tungsten to improve the performance of cutting metals. This type of tool steel contains alloying elements, so the hardenability is better than that of carbon tool steel, the deformation caused by heat treatment is small, and it has high hardness and wear resistance. Commonly used steels are chromium steel, silicon-chromium steel and chromium- tungsten-manganese steel. [Applications]: Mainly used to manufacture low-speed cutting tools (such as woodworking tools, fitter tools, drills, milling cutters, broaches, etc.) and measuring tools (such as calipers, micrometers, block gauges, templates, etc.). Measuring tool steel is required to have high hardness (62-65HRC), high wear resistance, sufficient strength and toughness, and high hot hardness (that is, the cutting tool can still maintain high hardness at high temperature); in order to ensure the accuracy of measurement, measuring tools are required. Cutting tool steel has good dimensional stability. [Chemical composition]: Measuring tool steel has high carbon content, wC=0.8%～ 1.50%, to ensure high hardness and wear resistance. The added alloying elements are Cr, Si, Mn, W, etc., to improve the hardenability, tempering resistance, hot hardness and wear resistance of steel. [Commonly used cutting tool steel]: 9SiCr is a widely used cutting tool steel, which is used to make various thin-edged low-speed cutting tools that require small deformation, such as die, tap, reamer, etc. [Commonly used measuring tool steel]: High-precision measuring tools (such as block gauges) can be made of measuring tool steel such as Cr2, CrWMn, etc., or bearing steel (such as GCr15); simple measuring tools (such as calipers, templates, rulers, gauges, etc.) are multi-purpose Carbon tool steel (such as T10A); for measuring tools that require precision and must prevent corrosion, stainless steel 3Cr13 and 9Cr18 are used. [Heat treatment]: The pre-heat treatment of measuring and cutting tool steel is spheroidizing annealing, and the final heat treatment is quenching and low- temperature tempering. After heat treatment, the hardness reaches 60-65HRC. High precision gauges can be cold treated after quenching to reduce the amount of retained austenite and thus increase their dimensional stability. In order to further improve dimensional stability, aging treatment can also be carried out after quenching and tempering. songshunmoldsteel41404340

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4140 Steel Product Information Steel Grade: 4140 Alloy steel Standard: AISI/ASTM/DIN/NF/JIS/GB/BS Place of Origin:Guangdong, China Brand Name:Songshun Model Number:4140/1.7225/42CrMo Technique:Hot Rolled Application:Die Steel Bar Special Use:Mold Steel Tolerance:±10% Shape:Round bars/Flat bar/Plate Delivery Time:8-14 days Heat treatment:Annealing/Q+T Processing Service:Bending, Welding, Decoiling, Cutting, Punching Technology:Hot Rolled/Forged/Clod Drawn Surface treatment:Black/Peeling/Polishing/Machined Deli , very condition:Hot rolled or forged/ Peeled or black surface/annealed or QT Test:UT100%/Elements testing Certificate:ISO/Mill certificate Service:Sample free and 24 hours online Experience:Ten years manufacturer experience Company Strength After more than ten years of development and growth, Songshun Iron and Steel has become a comprehensive special steel production enterprise, inventory enterprise and export enterprise. With an experienced export team and professional technical knowledge, Songshun Steel provides customers with technical advice and support, as well as global professional steel solutions and services. With satisfactory and reliable quality and professional services, the company's markets are all over the world, such as Colombia, Chile, Spain, Turkey, Iran, Vietnam, Malaysia, United Arab Emirates, Canada, Brazil, Mexico, etc. Welcome To Get a Quote MiKi Zhuo E-mail:jacklu@songshunsteel.com Skype/W , hatsapp/Wechat:+86-18269260283 ADD:No.4 Dongda Street, Shatou, Changan Town, Dongguan City, Guangdong Province, P.R.C China For more 4140 steel product information, please click this link: https://steelpurchase.com/4140-scm440-172 , 25-steel/ Company website: https://steelpurchase.com/ http://w , ww.songshunsteel.com/ songshunmoldsteel41404340

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1.Product name JIS SCM440 Steel Mechanical Properties Alloy Structual Steel 2.keyword   SCM440 Steel Mechanical Properties   3.Standard AISI/ASTM/DIN/NF/JIS/GB/BS 4.Steel Grade AISI 4140/ASTM 4140/DIN 1.7225 /NF 40CD4 /JIS SCM440 /GB 42CrMo /BS 708M40 5.Chemical Compositions(%) C: 0.38-0.45   Si: 0.17-0.37  Mn: 0.50 , -0.80  P≤0.035  S ≤0.035   Cr: 0.90-1.20  Mo: 0.15-0.25 6.Mechanical properties Tensile strength σb (MPa): ≥1080(110) Yield strength σs (MPa): ≥930(95) Elongation δ5 (%): ≥12 Area shrinkage ψ (%): ≥45 Impact energy Akv (J): ≥63 Impact toughness value αkv (J/cm2): ≥78(8) Hardness: ≤217HB Sample size: sample blank size is 25mm 7.Surface treatment Black/Peeling/Polishing/Machined 8.Techniqu , e Cold/Hot rolled, Cold-Drawn or Hot Forged 9.Heat Treatment Annealed; Quenched; Tempered 10.Delivery Condition Hot Rolled or Forged/Peeled or Black Surface/Annealed or QT Heat treatment standard Quenching at 850℃, oil cooling; tempering at 560℃, water cooling, oil cooling 10.Feature This steel has good strength, good toughness, high hardenability, good workability, small processing deformation, quite good fatigue resistance, small deformation during quenching, high creep strength and durable strength at high temperature and so on. 11.Test SGS/UT100%/Elements Testing 12.Certificate SGS/ISO/Mill Certificate 13.Delivery status Delivered in heat-treated (normalized, annealed or high temperature tempered) or unheated state 14.E-mail jacklu@songshunsteel.com 15.Skype/Whatsapp/ , Wechat +86-18269260283 16.Company website https://steelpurchase.com/ http://www.songs , hunsteel.com/ 17.songshunmoldsteel41404340

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Heat Treatment 4140 Alloy Steel Equivalent Steel Grade  China GB steel number 42CrMo, Germany DIN steel number 42CrMo4, Germany DIN material number 1.7225, French NF standard 40CD4/42CD4, Japanese JIS standard SCM440, British BS standard 708M40/708A42/709M40, American AISI/ASTM 4140, American SAE 4140, American UNS Standard G41400 Heat Treatment 4140 Alloy Steel Chemical Composition C:0.38-0.45 Si:0.17-0.37 S：≤0.035 P:≤0.035 Mn:0.50-0.80 Cr:0.90-1.20 Mo:0.15-0.25 Ni:≤0.30 Cu≤0.30 SAE 4140 Mechanical Properties Tensile Strength σb (MPa):≥1080(110) Yield Strength σS (MPa):≥930(95) Elongation δ5 (%):≥12 Reduction ψ (%):≥45  Impact Energy Akv (J):≥63 Impact Toughness akv (J/cm2):≥78(8) Annealed Hardness ≤217HB Our advantage Focus on the steel industry for more than ten years Strength factory Professional service Quality assurance Customized according to customer requirements Factory price Fast shipping time Good after-sales service Happy to work with customers High repurchase rate, etc. songshunmoldsteel41404340

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Songshun Alloy Steel Round Bar We are an industry and trade company with various steel products and have many years of experience in this field. We offer a wide variety of steels with competitive prices and good quality, and maintain a large inventory of over 20,000 tons. Our main products are alloy steel, tool steel, stainless steel, spring steel, bearing steel and other round and flat steel. Over the years, we have provided a wide range of high-quality steel for the automobile manufacturing, engineering machinery, mold and tool manufacturing industries, and have also been highly praised by domestic and foreign customers.songshunmoldsteel41404340

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In addition to iron and carbon, alloy steel is called alloy steel by adding other alloying elements. An iron-carbon alloy formed by adding an appropriate amount of one or more alloying elements on the basis of ordinary carbon steel. According to the difference of added elements and appropriate processing technology, special properties such as high strength, high toughness, wear resistance, corrosion resistance, low temperature resistance, high temperature resistance, and non-magnetic properties can be obtained. In addition to iron, carbon and unavoidable small amounts of silicon, manganese, phosphorus and sulfur, steel also contains a certain amount of alloying elements. The alloying elements in steel include one or more of silicon, manganese, molybdenum, nickel, antimony, vanadium, titanium, niobium, boron, lead and rare earth. This steel is called alloy steel of the alloy steel system. According to their respective resource conditions, it is found in my country that the alloy steel system mainly composed of silicon, manganese, vanadium, titanium, niobium, boron, lead and rare earth accounts for more than 10% of the total steel output. 8 categories. They are: alloy structural steel, spring steel, bearing steel, alloy tool steel, high speed tool steel, stainless steel, heat resistant stainless steel and electrical silicon steel.songshunmoldsteel41404340

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1.The main alloying elements of alloy steel are silicon, manganese, chromium, nickel, molybdenum, tungsten, vanadium, titanium, niobium, zirconium, cobalt, aluminum, copper, boron and rare earth. Among them, vanadium, titanium, niobium, zirconium, etc. It is a strong carbide forming element in steel. Given enough carbon, they can form their own carbides under the right conditions. When carbon is lacking or under high temperature conditions, they enter into solid solution in atomic state; manganese, chromium, tungsten, and molybdenum are carbide-forming elements, part of which enters solid solution in atomic state, and the other part forms substitute alloy cementite; aluminum, copper, nickel , cobalt, silicon, etc. are elements that do not form carbides and usually exist in solid solution in an atomic state. 2.There are many types of alloy steel, usually divided into low alloy steel (content <5%), medium alloy steel (content 5% ~ 10%) and high alloy steel (content > 10%). According to quality, it is divided into high-quality alloy steel and special alloy steel; according to its characteristics and uses, it is divided into alloy structural steel, stainless steel, acid-resistant steel, wear-resistant steel, heat-resistant steel, alloy tool steel, rolling bearing steel, alloy spring steel and special properties. Steel (such as soft magnetic steel, permanent magnetic steel and non-magnetic steel). 3.Alloy steel contains more other elements than carbon steel Alloy steel refers to steel containing silicon and manganese as alloying elements or deoxidizing elements, as well as other alloying elements, and some also contain certain non-metallic elements. According to the content of alloying elements in steel, it can be divided into low alloy steel, medium alloy steel and high alloy steel. The carbon steel mainly refers to the steel whose mechanical properties depend on the carbon content in the steel, and generally does not add a large amount of alloying elements, and is sometimes called ordinary carbon steel or carbon steel. Carbon steel is also called carbon steel, an iron-carbon alloy with a carbon content of less than 2% WC. In addition to carbon, carbon steel generally contains a small amount of silicon, manganese, sulfur, and phosphorus. According to the purpose, carbon steel can be divided into three categories: carbon structural steel, carbon tool steel and free-cutting structural steel. According to the carbon content, carbon steel can be divided into low carbon steel (WC ≤ 0.25%), medium carbon steel (WC0.25% - 0.6%) and high carbon steel (WC>0.6%)songshunmoldsteel41404340

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AISI 4340 steel is a medium carbon, low alloy steel known for its toughness and strength in relatively large sections. AISI 4340 is also one kind of nickel chromium molybdenum steels. 4340 alloy steel is generally supplied hardened and tempered in the tensile range of 930 – 1080 Mpa. Pre hardened and tempered 4340 steels can be further surface hardened by flame or induction hardening and by nitriding. The 4340 steel has good shock and impact resistance as well as wear and abrasion resistance in the hardened condition. AISI 4340 steel properties offer good ductility in the annealed condition, allowing it to be bent or formed. Fusion and resistance welding is also possible with our 4340 alloy steel. ASTM 4340 material is often utilized where other alloy steels do not have the hardenability to give the strength required. For highly stressed parts it is excellent choice. AISI 4340 alloy steel can also be machined by all customary methods.songshunmoldsteel41404340

Minimum Order: 2 barrels