080M040 bearing steel bar

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11-May-2024

The material 080M040 has higher strength, good machinability, medium cold deformation , poor weldability, no temper brittleness, low hardenability and water quenching crack easily. 080M040 is mainly used under the condition of conditioning or normalizing. 080M040 can be used to make the parts under high stress after surface quenching. 080M040 is suitable for manufacturing of the crankshaft spindle drive shaft, piston rod, connecting rod, sprocket. And gear, etc. If make weld assembly, 080M040 is needed to warm up first and slow cooling after welding.

080M040 Chemical composition %:

Grade	Chemical composition %:
Grade	C	Si	Mn	S	P	Cr	Ni	Cu
080M040	0.37-0.44	0.17-0.37	0.5-0.8	≤0.030	≤0.030	≤0.25	≤0.30	≤0.25

080M040 mechanical properties:

Grade	mechanical properties:
	Tensile strength σ b (Mpa)	Yield strength σ ^s (Mpa)	Elongation δ ^5/（%）	percentage reduction of area ψ/（%)	Hardness No heat treatment	impact absorbing energy （Aku2/J）
	min	min	min	min	max	min
080M040	570	335	19	45	217HB	47

Notes:
1, 080M040 specification: DIA 80-1200mm(forged round bar), 80-1200mm(square bar) Length 3-16 meters
2, 080M040 heat treatment: Quenching,Annealing,Normalizing and Tempering.
3, 080M040 tolerance: 0-+3mm(DIA), 0-+10mm(Length)

Our company, KUNFENG can produce all sizes of 080M040 forged steel round bar, 080M040 forged square bar, 080M040 forged shafts and 080M040 forged blocks.