30Mn round bars

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11-May-2024

The material 30Mn is a kind of high-quality carbon structural steel under the standard GB/T 699-1988.
30Mn Chemical composition %:

Grade	Chemical composition %:
Grade	C	Si	Mn	S	P	Cr	Ni	Cu
30Mn	0.27-0.34	0.17-0.37	0.70-1.00	≤0.035	≤0.035	≤0.25	≤0.30	≤0.25

30Mn 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
30Mn	540(55)	315(32)	20	45	217HB	63	78(8)

Notes:
1, 30Mn specification: DIA 80-1200mm(forged round bar), 80-1200mm(square bar) Length 3-16 meters
2, 30Mn heat treatment: Quenching,Annealing,Normalizing and Tempering.
3, 30Mn tolerance: 0-+3mm(DIA), 0-+10mm(Length)
The grade 30Mn’s strength and hardenability is higher than 30# steel. 30Mn’s weldability Plastic is medium. 30Mn has cutting good workability and cold deformation. 30Mn is common used in normalized condition. 30Mn is used in the manufacture of bolts, nuts, leverage, and small parts working under high stress.
Our company, KUNFENG can produce all sizes of 30Mn forged steel round bar, 30Mn forged square bar, 30Mn forged shafts and 30Mn forged blocks.