45Mn round bars

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11-May-2024

The material 45Mn is a kind of high-quality carbon structural steel.
45Mn Chemical composition %:

Grade	Chemical composition %:
Grade	C	Si	Mn	S	P	Cr	Ni	Cu
45Mn	0.42-0.50	0.17-0.37	0.70-1.00	≤0.035	≤0.035	≤0.25	≤0.25	≤0.25

45Mn mechanical properties:

Grade	mechanical properties:
	Tensile strength σb (Mpa)	Yield strength σb (Mpa)	Elongation σb (%)	reduction of area ψ (%)	Hardness No heat treatment	Impacting Energy Akv (J)	Notched bar impact strength αkv (J/cm2)
	min	min	min	min	max	min	min
45Mn	620(63)	375(38)	15	40	241HB	39	49(5)

Notes:
1, 45Mn specification: DIA 80-1200mm(forged round bar), 80-1200mm(square bar) Length 3-16 meters
2, 45Mn heat treatment: Quenching,Annealing,Normalizing and Tempering.
3, 45Mn tolerance: 0-+3mm(DIA), 0-+10mm(Length)

45Mn is more successful new steel grade instead of 40Cr steel.45Mn has higher strength, hardness, wear resistance and good toughness. 45Mn’s hardenability is higher than 45Cr and hardening diameter is 18 ~ 33 mm in oil critical. 45Mn is usually used under the condition hardening and tempering and the temperature range for 45Mn is 20～425℃.
The same material for 45Mn are 1035, S45C,080A52,XC35 and 50Γ.
Our company, KUNFENG can produce all sizes of 45Mn forged steel round bar, 45Mn forged square bar, 45Mn forged shafts and 45Mn forged blocks.