SAE Alloy 4340 Steel Bar US grade SAE Alloy 4340 Steel Bar Equilvalents

Dongguan Songshun Mould Steel Co., Ltd.
Dongguan Songshun Mould Steel Co., Ltd. is an Indusrtial and trading company
with 2 warehouses that manufactures good & high quality kinds of steels
starting from 2012. The company provides the customized products and OEM
service. What´s more, we keep the mass stock of over 20000 tons. In those
years, we offer a wide range of steels to our customers from all over the
world. And we enjoy high praise among them.

SAE 4340 steel Product Details 
·GB steel number:CN:40CrNiMoA DIN:36CrNiMo4 JIS:SNCM439 BS:816M40 
US:AISI/ASTM4340
·keyword:SAE Alloy 4340 Steel Bar
·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.;
·Other Steel 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

·AISI/ASTM 4340 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

·ASTM 4340 Mechanical Properties
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

·Surface Treatment

Plate: Origin Black,Orign cold rolled bright, Machined,Grinded

Bar:Origin Black, Orign cold rolled(drawn) bright,Turned, Peeled, Grinded

·For more 4340 steel product information, please click this link:
https://steelpurchase.com/4340-sncm439-16 , 563-steel/#
songshunmoldsteel41404340

Minimum Order: 2 tons

Click to Enlarge