40CrNiMoA

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11-May-2024

steel round bar is devided into hot rolled steel bar and Forged steel bar. round bar has high strength and hardness, good weldability, toughness, machinability and so on.

Common diameter for hot rolled steel bar:8mm to 80mm
Common diameter for forged steel bar: 80mm to 1200mm

Package: standard seaworthy packing or as customer required

Tolerance for the steel bar:
Diameter tolerance: 0~3mm， Length tolerance：0~20mm
Straightness: 3mm/1000mm

Delivery condition for steel bar:
Hot forged +Normalized+rough turned Q/T:Quench+ Temper Annealing
EAF ARC FURNACE + LF REFINING+ VD + FORGING (DOUBLE) + FIXED LENGTH + SEP1921C/c TESTING

Equal material of

DIN	AISI	JIS	BS	Russia
34CRNIMO6	4340	SNCM439（SNCM8）	871M40	40NiCrMo7

Chemical composition of

Grade	C	Si	Mn	P	S	Cr	Ni	Cu	Mo
	0.37~0.44	0.17~0.37	0.50～0.80	≤0.030	≤0.030	0.60~0.90	1.25~1.65	≤0.25	0.15～0.25

Mechanical property of

Grade	Tensile strength	Yield strength	Elongation	Impact value
Grade	σb (MPa) Min	σb (MPa) Min	δ5 (%)Min	Akv (J)Min
39CrNiMo3	≥980(100)	≥835(85)	≥12	≥78

steel round bar Application
Typical applications are for structural use, such as aircraft landing gear, power transmission gears and shafts and other structural parts.

KUNFENG Co.,ltd is professional in steel bar. We are a large stockist of steel bar in China. We have almost 750 ton steel bar of in stock. The stock size ranges from Φ80to Φ700. The common length for steel bar is 3000mm, 6000mm, 9000mm. And the price is competitive. If your size can be picked in our warehouse, we can transport the products to the loading port in 3 days. So please be free to contact us if you require steel bar.