Hot Rolled AISI 4340 Alloy Structural Steel Warehouse

Hot Rolled AISI 4340 Alloy Structural Steel Warehouse
Introduction
AISI 4340 alloy structural steel is a medium carbon nickel-chromium-molybdenum
steel alloy, very similar to 4130 steel, but AISI 4340 alloy steel has high
white spot sensitivity and temper brittleness, and is widely used in large-
sized important quenched and tempered parts, shafts , transmission parts of
heavy chemical machinery, etc., and AISI 4340 steel is a wear-resistant
material with particularly good wear resistance, impact resistance and impact
resistance, as well as excellent atmospheric corrosion resistance, and because
the material is usually in Annealed condition, it also has the advantages of
excellent hardenability, stability against overheating and short construction
period. Our AISI 4340 alloy steel can be not only heat treated but also fusion
and resistance welding.

Chemical Composition
The chemical composition of Song Shun AISI 4340 alloy structural steel.
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 Ni:1.25-1.65
Mechanical Properties
The mechanical properties of AISI 4340 alloy structural steel
Tensile strength σb (MPa): ≥980(100)
Yield strength σs (MPa): ≥835(85)
Elongation δ5 (%): ≥12
Area shrinkage ψ (%): ≥55
Impact energy Akv (J): ≥78
Elongation δ5 (%): ≥12
Area shrinkage ψ (%): ≥55
Impact energy Akv (J): ≥78
Impact toughness value αkv (J/cm2): ≥98(10)
Sample size: sample blank size is 25mm

AISI 4340 High Quality Alloy Steel Round Bar

· GB steel number:   CN：40CrNiMoA   DIN：36CrNiMo4  JIS：SNCM439  BS：
816M40  US:AISI/ASTM4340
· Chemical component:   C:0.37-0.44  Si:0.17-0.37  S：≤0.35  P:≤0.35
Mn:0.50-0.80 Cr:0.60-0.90 Mo:0.15-0.25 N:1.25-1.65
· Usage: 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.;
· Types:5140 /4140 / 4340 / 4142 / 15CrMo / 6150 / 38CrMoAI / 8620 .....
· Serve:OEM/ODM
· Delivery status:With heat treatment (normalized, annealed or high
temperature tempered) or without heat treatment Goods, the delivery status
should be specified in the contract.

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
songshunsteel41404340

Minimum Order: 2 tons

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