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6/21/22 9:51 GMT
API 5L / ASTM A106 / A53 Grad B carbon steel pipe
Hebei Huayang Steel Pipe Company Ltd. is the largest ERW and LSAW steel pipe manufacturer in Northern China. We have a modern factory covering an area of 666,000 square meters, with over 700 employees and a fixed asset of 151 million USD, annual output capacity is up to 1000,000 Tons. We can quickly fulfill all of our domestic and international customers’ orders, try our best to meet customers’ requirements. welded steel piles are manufactured from steel plates and can be manufactured in thicknesses of up to 50mm.Steel pipe pile is a most recommend piling material for sea port constructions, yard buildings. It has been widely used in sea works or marine works, to create the tough foundations. Other than this, typical uses also as under buildings, bridges, and structural constructions. Specification OD: 508-1422mm WT: 10-60mm Technique LSAW Material St37 St52 Grade B X46 X46 X52 Q235 Q355 S235 S355 Surface treatment External: 3PE, bitumen, epoxy powder Internal: Epoxy, bitumen, cement DNT testing Hydrostatic test UT test RT test End treatment Bevel,plain end Certificate API 5L Contact:
Phone: Fax: Email: Hebei Huayang Steel Pipe Co., Ltd.
Room1311-1313, Tiancheng Building, Beijing Road, Yunhe District, Cangzhou City, Hebei Province, China. Cangzhou 061000 China 6/13/22 8:54 GMT
Community Camouflage Cell Tower Pine Tree Communication
Camouflaged Tree Tower iBionic tree, also known as simulation tower and bionic communication tower, belongs to the technical field of communication launch tower. It is to coordinate the communication tower with the surrounding natural environment and effectively solve the problem of difficult station construction in scenic spots and other places. Its advantage is to maintain all the advantages of the original single tube tower and make major breakthroughs and improvements in its shape. Taking the naturally growing pine and camphor trees as simulation modeling samples, design sketch drawings and computer effect drawings, formulate sculpture and spraying process procedures, and simulate and camouflage the single tube tower, Make people unaware of the existence of the tower and integrate it into the surrounding natural environment. Contact:
Phone: Fax: Email: Hebei Changtong Steel Structure Co., Ltd.
Fu Zhao Village,Guang Chuan Town, Jing County, Hengshui City, Hebei Province Hengshui 053000 China 6/13/22 2:35 GMT
CGCC Ppgi Coated Coil HDG Gi Hot Dipped Galvanized Steel Coil
Product Parameters Product Name Color Pre-coated Galvanized Coil Standard AISI, ASTM, JIS, DIN, BS, EN, GB Material Grade DX51D DX52D SGCC SPCC Surface Treatment Color Pre-coated Color All Ral Color or as customized Top Coating Thickness 15μm-25μm Back Coating Thickness 5μm-20μm Thickness 0.12mm-1.2 , mm Width 600mm-1500mm or as customized Package Standard seaworthy export package Original Port Tianjin Port Delivery Time 7-15 working days after got the deposit Contact:
Phone: Fax: Email: Shandong Rigang Steel Industry Co., Ltd
Room 1402, Building 2, Qisheng Square, No. 1666, Xinluo Street Shandong 250000 China 6/9/22 9:27 GMT
high speed steel composition forged high speed steel composition supplier
high speed steel composition forged high speed steel composition supplier High-speed steel (HSS) is a tool steel with high hardness, high wear resistance and high heat resistance, also known as high-speed tool steel or front steel, commonly known as white steel. High-speed steel was created in 1898 by F.W. Taylor and M. White in the United States. High-speed steel has good process performance, good strength and toughness, so it is mainly used to manufacture complex thin-edged and impact-resistant metal cutting tools, as well as high-temperature bearings and cold extrusion dies. In addition to the high-speed steel produced by the smelting method, powder metallurgy high-speed steel appeared after the 1960s, which has the advantage of avoiding the reduction of mechanical properties and heat treatment deformation caused by the segregation of carbides produced by the smelting method. Craftsmanship The heat treatment process of high-speed steel is more complicated, and it must go through a series of processes such as quenching and tempering. Quenching is generally carried out in two stages due to its poor thermal conductivity. First preheat at 800 ~ 850 ℃ (to avoid causing large thermal stress), then quickly heat to the quenching temperature of 1190 ~ 1290 ℃ (the actual temperature of different brands is different), and then oil cooling or air cooling or gas cooling. The factories are all heated by salt furnaces, and vacuum furnaces are also widely used. After quenching, a part (about 30%) of retained austenite remains in the internal structure and is not transformed into martensite, which affects the performance of high-speed steel. In order to transform the retained austenite and further improve the hardness and wear resistance, it is generally necessary to carry out 2 to 3 tempering times, the tempering temperature is 560 ° C, and the temperature is kept for 1 hour each time. Production method: Usually electric furnace is used for production, and powder metallurgy method was used to produce high-speed steel, so that the carbides are evenly distributed on the substrate in the form of extremely fine particles, which improves the service life. Uses: used to manufacture various cutting tools. Such as turning tools, drills, hob, machine saw blades and molds with high requirements. Songshun specialized in Special Steel for almost 20 years. We can supply mold steel, high speed steel, alloy steel, free cutting steel and etc.Welcome your contact 24 hours a day!!! E-mail:jacklu@songshunsteel.com Skype , /Whatsapp/Wechat:+86-18269260283 Songshun Tiktok:mikizhuo Songshun Facebook:Songshun Steel Songshun YouTube:MiKi Zhuo Songshun Company Website:https://steelpurchase.com/ http://www.songshunsteel.com/ songshunsteel , 41404340 Minimum Order: 2 barrels Contact:
Phone: Fax: Email: Dongguan Songshun Mould Steel Co., Ltd.
1st Floor, No. 1, Dongda Fourth Street, Shatou Community, Chang'an Town Dongguan 523846 China 6/9/22 9:21 GMT
Heat Treatment M2 High Speed Tool Steel Tolerance
1.m2 steel is molybdenum-based high-speed steel, which has the advantages of small carbide inhomogeneity and high toughness. It is easy to overheat, so the quenching heating temperature should be strictly controlled, and the requirements for heat treatment protection are stricter. Due to its good hardness and wear resistance, it is mostly used to manufacture tools for cutting difficult-to-cut materials. M2 steel has a high tendency to carbides, so it has stricter requirements for heat treatment protection, and is suitable for molds that withstand vibration and impact loads. 2.AISI M2 Steel physical properties Factory hardness: ≤255HB Quenching temperature: 1220-1240 Hardness:≤63 3.1.3343 High Speed Steel Features Hardness (factory state): ≤255HB Curing Temperature: 1220℃-1240℃ Hardness (after heat treatment): ≤ 63 HRC It is a good choice for cutting applications due to its high wear resistance and toughness. Carbide evenly distributed and high toughness. Can be used to make milling cutters, reamers, broaches, gear cutters and other industrial tools. 4.M2 chemical composition Carbon C: 0.80 to 0.90 (allowable deviation: ±0.01) Silicon Si: 0.20 to 0.45 (allowable deviation: ±0.05) Manganese Mn: 0.15 to 0.40 (allowable deviation: +0.04) Sulfur S: ≤0.030 Phosphorus P: ≤0.030 Chromium Cr: 3.80~4.40 (allowable deviation: ±0.05) Nickel Ni: Allowable residual content ≤ 0.30 Copper Cu: allowable residual content ≤ 0.25 Vanadium V: 1.75~2.20 (allowable deviation: ±0.05) Molybdenum Mo: 4.50~5.50 (allowable deviation: size≤6,±0.05; size>6,±0.10) Tungsten W: 5.50~6.75 (allowable deviation: size≤10,±0.10; size>10,±0.20) Note: According to the agreement between supply and demand, the content of V can be 1.60~2.20 5.Our company (Dongguan Songshun Mould Steel Co., Ltd.) has been producing and exporting alloy steel plates for more than ten years. Our professionalism, product quality, and the strength of our factory will not let you down. A satisfactory purchase, you are welcome to contact us at any time.songshunsteel41404340 Minimum Order: 1 bags Contact:
Phone: Fax: Email: Dongguan Songshun Mould Steel Co., Ltd.
1st Floor, No. 1, Dongda Fourth Street, Shatou Community, Chang'an Town Dongguan 523846 China 6/9/22 8:39 GMT
aisi 4140 mechanical properties high yield aisi 4140 mechanical propertie
1. Steel Grade AISI 4140/DIN 1.7225/JIS SCM440/GB 42CrMo Size & Dimension Dia:20-120mm L:2000-5800mm Surface treatment Black/Peeling/Polishing/Machined Technique Cold/Hot rolled, Cold-Drawn or Hot Forged Heat Treatment Annealed; Quenched; Tempered Delivery Condition Hot Rolled or Forged/Peeled or Black Surface/Annealed or QT Test SGS/UT100%/Elements Testing Certificate ISO/Mill Certificate AVAILABLE Steel Type Round bar/Plate 2. AISI 4140 alloy steel round bar sheet plate has high fatigue strength and low notch sensitivity. Low-temperature impact toughness is also very high, no obvious temper brittleness. It is mainly used after quenching and tempering state. It is used to manufacture high-strength parts under impact loads and the fittings with large cross-sections and other stressed members. Such as the horizontal eccentric shaft of the horizontal forging machine, the crankshaft of the forging press, and etc. And the equivalent grade for it is DIN 1.7225 and JIS SCM440. 4140 Steel properties and chemical composition as below. 3. AVAILABLE SIZE: Round bar: Diameter(mm) Max 800mm; Length(mm) Max 12000mm. Plate: Thickness(mm) Max 800mm; Width(mm) Max 2300mm; Length(mm) Max 12000mm. Condition: Cold rolled(drawn)≤50mm, Hot rolled≤12-250mm, Hot forged≥50mm. AISI 4140/DIN 1.7225 Introduction: AISI 4140 alloy steel is chromium, molybdenum, manganese containing low alloy steel. It has high fatigue strength, abrasion and impact resistance, toughness, and torsional strength. Fabrication and Heat Treatment: 1. Forging Preheat the steel carefully, then raise the temperature to 1150-1200°C for forging. Do not forge below 850°C. 2. Annealing Heat the AISI 4140 slowly to 800-850°C and allow enough time for the steel to be thoroughly heated. Cool slowly in the furnace to 480°C followed by air cooling. 3. Stress Relieving When parts are heavily machined, ground or otherwise subject to cold work, stress relieving will be beneficial prior to hardening. 4. Hardening AISI 4140 steel is usually supplied ready heat treated to 18-22HRC. If further heat treatment is required annealed AISI 4140 should be heated slowly to 840- 875°C and after adequate soaking at this temperature quench in oil. Temper as soon as the tools reach room temperature. 5. Tempering Heat the AISI 4140 carefully to a suitable temperature selected by reference to a tempering chart or table (usually between 550-700°C, soak at the temperature for 2 hours per 25mm of ruling section, then allow to cool in air. Tempering between 250-375°C is not advised as tempering within this range will seriously reduce the impact value. 6. Surface Treatment Plate: Origin Black, Orign cold rolled bright, Machined, Grinded Bar: Origin Black, Orign cold rolled(drawn) bright, Turned, Peeled, Grinded ABOUT US: We specialize in 4140 and 4340 steels, which are versatile and have many advantages for a variety of industrial applications. Knowing the differences between them will help you choose the one that best suits your needs. Our advantages: Focus on the steel industry for more than ten years, strong factories, professional services, ensure quality, customize according to customer requirements, factory prices, fast transportation,Good after-sales service, pleasant cooperation, high repurchase rate 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. 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 For more 4140 steel product information, please click this link: https://steelpurchase.com/aisi-4140-steel , -round-bar-sheet-plate-jis-scm440-din- 1-7225/< , br>songshunsteel41404340 Minimum Order: 2 barrels Contact:
Phone: Fax: Email: Dongguan Songshun Mould Steel Co., Ltd.
1st Floor, No. 1, Dongda Fourth Street, Shatou Community, Chang'an Town Dongguan 523846 China 6/8/22 3:39 GMT
ASTM AISI Carbon Steel Round 4140 Alloy Steel Bar For Construction
Product name 8mm tmt steel bar Size O.D 8-480mm W.T 8-480mm Length 1-12m St , andard AISI,ASTM,GB,DIN,BS,JIS Grade , 12Cr1MoV Cr5Mo 15CrMo 30CrMo 40CrMo 20SiMn 12Cr1MoVG 15CrMoG 42CrMo 20G Inspection X-ray inspection, manual ultrasopic inspection,surface inspection,hydraulic testing Technique Hot Rolled Section Shape Round Main Market Southeast Asia, Middle East, Australia,USA,South America,Africa Productivity 5000 Tons/month Packing Standard bundle package Beveled end or as per request Surface Treatment Black Painted, PE Coated, Galvanized or Customized all available Date of Delivery According to The Specifications And the Quantities Of Each Contract, Time Start To Begin When We confirm the Date of the Earnest or L/C Method of Payment T/T L/C West Union Method Of Delivery Terms According To the for International Trading Remarks 1.Payment Terms T/T, L/C,West Union 2.Trade Term:FOB/CFR/CIF 3.Minimum Quantity of Order: 2 Tons 4.Delivery Time:7-15 days after receipt of deposit Contact:
Phone: Fax: Email: Jiangsu TISCO Hongwang Metal Products Co. Ltd
Wuxi,Jiangsu Wuxi 214000 China 6/7/22 9:20 GMT
LR DH36 Shipbuilding Steel Plate
A structural grade of steel plate utilized almost exclusively in the shipbuilding and offshore industries. This grade is defined as Higher Strength with specified minimum yield of 51 KSI. These products are offered in various conditions; AH36 in the control-rolled condition, DH36 in both the control- rolled and normalized condition, EH36 in the normalized condition. These grades are also certified by the American Bureau of Shipping (ABS). Offshore and marine-quality steel plate contains chemical elements that resist corrosion, decrease brittleness – especially in cold temperatures – and increase strength and toughness to resist vibration and force traumas. Gnee Steel supplies offshore and marine-quality steel plate that meet LR, ASTM, ABS and API certifications. Contact:
Phone: Fax: Email: Gnee (Tianjin) Multinational Trade Co., Ltd.
1018-1020 Wanda Center, Zhonghua Road, Wenfeng District, Anyang City, Henan Province, China Anyang 455000 China 6/6/22 5:53 GMT
Box Column Steel Structure
Box Column Steel Structure Delivery time: 15-30days Price term:EXW,FOB,CIF,CFR,CNF,etc. Payment:L/C,T , /T,Western Union,etc. Port Delivery:Qingdao, Shanghai, Tianjin, Shenzhen,etc. We can provide customized products in different materials and sizes to meet different needs. Steel structure is a structure composed of steel materials and is one of the main types of building structures. In the general industry, it is divided into light steel and heavy steel structures according to weight, which are widely used in large workshops, stadiums, super high-rises and other fields. ·Steel has high strength and high modulus of elasticity. ·It is suitable for bearing shock and dynamic load, and has good seismic performance. ·Steel structural members are easy to manufacture in factories and assemble on site. ·Because the welded structure can be completely sealed, it can be made into high-pressure containers, large oil pools, pressure pipes, etc. with good air tightness and water tightness. https://www.faststeelfactories.com/p , roducts/box-column-steel-structure Minimum Order: 1 bags Contact:
Phone: Fax: Email: Fast Steel Factories Co., Ltd.
Jiulong Street Industrial Park Qingdao China 5/27/22 10:59 GMT
316L 6mm Stainless Steel Plates 1D Heat Annealed AMS 5507
316L 6mm Stainless Steel Plates 1D Heat Annealed AMS 5507 Type 316 Austenitic Stainless Steel Sheets Metal AMS 5507 Flat rolled No.1 or 2B overview ASTM A240 Type 316 is the second-most common stainless steel next to 304. Stainless Steel Sheet Type 316 generally contains 16% chromium and 10% nickel, with the addition of molybdenum normally ranging from 2-3%. Molybdenum increases corrosion resistance, particularly against chlorides and other industrial solvents. While there may be a difference between the chemical compositions of SA 240 type 316L Perforated Sheet and 304, their mechanical properties are similar. ASTM A240 Grade 316 Chequered Plate is commonly used in many industrial applications involving processing chemicals, as well as high-saline environments such as coastal regions and outdoor areas where de-icing salts are common. Due to its non-reactive qualities, 316 Stainless Steel Strip & Mesh Sheet is also used in the manufacture of medical surgical instruments. 316 Stainless Steel is more corrosion resistant than grade 304 and is suitable for marine and coastal applications. Produc Forms : Sheet, plate , Coil , Strip .wire , Pipe, Tube ,Bar , Profile, Round, Flat, Square, Hexagonal Type 316 Austenitic Stainless Steel Sheets Metal AMS 5507 Flat rolled No.1 or 2B Specification and Dimension Ranges Specifications AMS 5507, AMS 5524, AMS 5648, AMS 5653, ASME SA 240, ASME SA 312, ASME SA 479, ASTM A 240, ASTM A 276, ASTM A 276 Condition A, ASTM A 276 Condition S, ASTM A 312, ASTM A 479, EN 1.4404, W. Nr./EN 1.4401, Werkstoff 1.4401, Werkstoff 1.4404 Contact:
Phone: Fax: Email: Wuxi Zhongxin Special Steel Co.,Ltd
Room1705, Xinlian Steel Mansion , No 1288 Guangrui Road , Liangxi district , WUXI City , Jiangsu province ,P.R,CHINA. Wuxi 214000 China 5/24/22 5:57 GMT
Simple Modern Stainless Steel Kitchen Cabinet Islands Style 2D 3D Drawing
jinhengsteel Modern Simple Design Stainless Steel Kitchen Cabinet Door Material Stainless Steel/Customizable Countertop Material Stainless Steel/Customizable Size Customizable Carc , ass Particle Board / MDF / Plywood Service 2D/3D Drawing / CAD Drawing Accessories Drawer Basket,Drawer Slide,Faucet,Handle & Knob,Hinge,Lazy Susan Storage,Sink,Toe Kick,Waste Container... Application Apartment Kitchens, Hotel Kitchens, Office Pantry, House Kitchens etc Contact:
Phone: Fax: Email: Foshan Jinheng Steel Metal Technology Co., Ltd.
No. 19, Shangliao Industrial East Road, Beijiao Town, Shunde District, Foshan City, Guangdong Province Foshan 528000 China 5/24/22 3:26 GMT
26inch 3m Submerged Arc Welded Pipes Seam Tubing Q235b For Water
Product name: Spiral Submerged-arc Welded Steel Pipe / SSAW Steel Pipe Usage: Low pressure liquid delivery, such as water, gas, and oil, Offshore Piling Pipe / Port Construction Pipe, Structure Pipe Standard: API 5L, API 5CT, ASTM A252, ASTM 53, EN10217, EN10219, BS 5950, ASTM A572 , JIS, IS, Certificate: EN10217, EN10219, API 5L PSL1/ PSL2, API 5CT Out Diameter: 219.1 - 3048mm Wall Thickness: 5 - 30mm Length: Up to 70m Steel Grade: API 5L: GR A, GR B, X42,X46, X56, X60,X65,X70 ASTM A252 GR 1, GR 2, GR 3 ASTM A53: GR A, GR B, GR C, GR D BS 4360: Grade 43, Grade 50 EN: S275, S275JR, S355JRH, S355J2H Surface Treatment: Fusion bond Epoxy coating, Coal Tar Epoxy, 3PE, Vanish Coating, Bitumen Coating, Black Oil coating as per customer’s requirement Test: Chemical Component Analysis, Mechanical Properties (Ultimate tensile strength, Yield strength, Elongation), Technical Properties (Flattening Test, Bending Test, Blow Test, Impact Test), Exterior Size Inspection, Hydrostatic Test, X-ray Test. Mill Test Certificate: EN 10204/3.1B Contact:
Phone: Fax: Email: Tianjin Xinyue Industrial and Trade Co., Ltd
18th Floor,South Tower, Parklane Plaza,No.208 South Xiaoxiang Avenue, Yuelu District, Changsha,Hunan,China Changsha 410000 China 5/24/22 3:18 GMT
16Mn Hot Rolled Seamless Steel Pipe DIN1629 ST52 Q345B For Mechanical Low A
OD Size Range: 15-820mm Thickness Size Range: 2-70mm Material: DIN1629 ST52 Q345B 16Mn 16Mn is a Low-alloy high-strength structural steel: the carbon content is 0.1%-0.25%, and the main alloying elements manganese, silicon, vanadium, niobium and titanium are added. Chemical Composition C Si Mn P S Cr Ni Cu 0.13~0.19 0.20~0.6 1.2~1.6 ≤0.03 ≤0.02 ≤0.15 ≤0.3 ≤0.25 Mechanical behavior Tensile strength: 470~660N/mm2 Yield strength: 275~345N/mm2 Elongation: 21%. Main Features Good comprehensive performance, good low temperature performance, good stamping performance, good welding performance and machinability. Applications Ships, boilers, pressure vessels, oil storage tanks, bridges, power station equipment, hoisting and transporting machinery and other welded structural parts with higher loads. Delivery Status The steel is delivered in hot rolled, controlled rolled, normalized, normalized + tempered, thermomechanical rolled (TMCP) condition. Contact:
Phone: Fax: Email: Shandong Xiangtong Huiyuan Metal Materials Co., Ltd.
Room 11718,17, FF, Building 5, Core Business District, East Contemporary International Plaza, Dongchang Road, Liaocheng Economic and Technological Development Zone, Shandong Province Liaocheng 252000 China 5/23/22 9:40 GMT
Jis G3141 Pre Painted Steel Coil G550 High Glossy Brick Pattern Color
JIS G3141 SOFT QUALITY G550 HIGH GLOSSY BRICK PATTERN COLOR STEEL PREPAINTED PPGI COLOR COATED COIL PPGI (PPGL) Features: Item name Prepainted galvanized steel coils on sale Grade DX51D+Z S250GD+Z SGCC DX52D+Z S280GD+Z SGCD DX53D+Z S350GD+Z SGCE DX54D+Z S550GD+Z DX56D+Z Thickness 0.12 ~ 3.00 mm (cold rolled) 1.20 ~ 4.60 mm (Hot-rolled ) Width 10 - 600 mm (strip) 600 - 1250 mm (coil) Tolerance Thickness: ±0.01 mm Width: ±2 mm Coil ID 508 mm - 610 mm Coil weight 3 - 8 ton or as client requirement. Zinc coating 30g - 275g / m2 Spangle Big spangle,Regular spangle,Mini spangle,Zero spangle Surface treatment Oil,Passivation, Chromated, Skin-passed, Anti-finger Print HS code code 72104900 Application Widely used in road, railway, civil construction, water conservancy construction; all kinds of machinery, electrical appliances, window protection and aquaculture, etc. Package Standard export package (Plastic film in the first layer,second layer is Kraft paper. Third layer is galvanized sheet) Delivery time Within 15 workdays after deposit received Remarks Insurance per to Contract terms; MTC will be handed on with shipping documents; We accept the third party certificatation test. Contact:
Phone: Fax: Email: WUXI RAYMOND STEEL CO.,LTD
Room 2001, Gate 10, Guanyuan Apartment, Maoye Plaza, No.128, Qingyang Road, Wuxi Wuxi 214000 China 5/19/22 10:03 GMT
Good Workmanship Cutting Tool Spring Steel Alloy Round Bars
Also known as wind steel or front steel, also known as white steel. It means that when quenched, it hardens even when cooled in air and is sharp. It is a complex alloy steel containing carbide-forming elements such as tungsten, molybdenum, chromium, vanadium, and cobalt. The total amount of alloying elements is about 10 to 25%. It can still maintain high hardness under high heat generated by high-speed cutting (about 500 ℃), and the HRC can be above 60. This is the most important characteristic of high-speed steel - red hardness. After quenching and low-temperature tempering, carbon tool steel has high hardness at room temperature, but when the temperature is higher than 200 °C, the hardness drops sharply, and the hardness at 500 °C has dropped to a similar level to the annealed state. , completely lost the ability to cut metal, which limits the use of carbon tool steel to make cutting tools. High- speed steel, due to its good red hardness, makes up for the fatal shortcomings of carbon tool steel and can be used to manufacture cutting tools. High-speed steel generally does not do tensile strength testing, but mainly metallographic and hardness testing. After the correct heat treatment of tungsten and molybdenum high-speed steel, the Rockwell hardness can reach above 63, and the cobalt high-speed steel is above 65. The acid leached low-magnification structure of the steel shall not have shrinkage cavities and skin turns visible to the naked eye. The center is loose, and the general looseness should be less than grade 1. The content of metallographic inspection mainly includes three items: decarburization layer, microstructure and carbide inhomogeneity. 1. High-speed steel should not have obvious decarburization. The microstructure must not have fishbone-like eutectic ledeburite. 2. Carbide inhomogeneity in high-speed steel has the greatest impact on quality, and the metallurgical and mechanical departments attach great importance to the level of carbide inhomogeneity. Different grades of carbide non-uniformity requirements can be put forward according to different uses of steel, and usually should be less than grade 3. 3. In addition to high hardness, high wear resistance and sufficient toughness, another important factor is the red hardness of high-speed steel for manufacturing cutting tools. (Red hardness refers to the ability of the cutting edge to resist softening under red heat when the tool is cutting at high speed.) One way to measure the red hardness is to first heat the steel to 580-650°C, keep the temperature for 1 hour, then cool it down, and measure its hardness after repeating this for 4 times. The quenching temperature of high-speed steel is generally close to the melting point of the steel. After quenching, it is generally necessary to temper 3 times between 540 and 560 °C. Increasing the quenching temperature can increase the red hardness of the steel. In order to improve the service life of high-speed steel tools, the surface can be strengthened, such as low-temperature cyanidation, nitriding, sulfur-nitrogen infiltration, etc. songshunmoldsteel41404340 Minimum Order: 1 bags Contact:
Phone: Fax: Email: Dongguan Songshun Mould Steel Co., Ltd.
1st Floor, No. 1, Dongda Fourth Street, Shatou Community, Chang'an Town Dongguan 523846 China SOURCE: Import-Export Bulletin Board (https://www.imexbb.com/)
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