ASTM1040 round bars

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11-May-2024

The material ASTM1040 is a kind of high-quality carbon structural steel under the standard ASTM A29/A29M-04. The domestic brand Corresponding to ASTM1040 is 25CrNiMo.
Performance and application for ASTM1040:
ASTM1040 carbon structural steel has high strength and good machinability, cold plasticity deformation medium, bad weldability. After quenching tempering, ASTM1040 can be welded and has no temper brittleness as heat treatment, but low hardenability.
ASTM1040’s usage:
ASTM1040 is widely used for crank shaft, spindle, drive shaft, connecting rod, tie rod, gear.
ASTM1040 Chemical composition %:

Grade	Chemical composition %:
Grade	C	Si	Mn	S	P	Cr	Ni	Cu
ASTM1040	0.37-0.44	0.17-0.37	0.60-0.90	≤0.05	≤0.04	≤0.25	≤0.25	≤0.25

ASTM1040 mechanical properties:

Grade	Mechanical properties:
	Tensile strength σb (Mpa)	Yield strength σs (Mpa)	Elongation δ5/（%）	Percentage reduction of areaψ (%)	Impact AKv(J)	Impact toughness value of alpha kv (J/cm2)	Hardness No heat treatment
	min	min	min	min	min	min	max
ASTM1040	570(58)	335(34)	19	45	47	59(6)	217

Notes:
1,ASTM1040 specification: DIA 80-1200mm(forged round bar), 80-1200mm(square bar) Length 3-16 meters
2, ASTM1040 heat treatment: Quenching,Annealing,Normalizing and Tempering.
3, ASTM1040 tolerance: 0-+3mm(DIA), 0-+10mm(Length)

Our company, KUNFENG can produce all sizes of ASTM1040 forged steel round bar, ASTM1040 forged square bar, ASTM1040 forged shafts and ASTM1040 forged blocks.