20Mn round bars

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11-May-2024

The material 20Mn is a kind of high manganese low carbon steel penetration under the standard GB/T 699-1988.
20Mn Chemical composition %:

Grade	Chemical composition %:
Grade	C	Si	Mn	S	P	Cr	Ni	Cu
20Mn	0.17-0.24	0.17-0.37	0.7-1.00	≤0.035	≤0.035	≤0.25	≤0.25	≤0.25

20Mn mechanical properties:

Grade	mechanical properties:
	Tensile strength σb (Mpa)	Yield strength σb (Mpa)	Elongation σb (%)	reduction of area ψ (%)	Hardness No heat treatment
	min	min	min	min	max
20Mn	450(46)	275(28)	24	50	197HB

Notes:
1,20Mn specification: DIA 80-1200mm(forged round bar), 80-1200mm(square bar) Length 3-16 meters
2,20Mn heat treatment: Quenching,Annealing,Normalizing and Tempering.
3,20Mn tolerance: 0-+3mm(DIA), 0-+10mm(Length)
The grade 20Mn’s properties are similar with 15Mn. 20Mn has higher strength. Plastic,machinability But cutting and a little higher than 15 steel hardenability and hardenability than 15Mn. 20Mn has good toughness after hot rolling or normalizing treatment.
The material 20Mn is widly used for gear, crankshaft, bracket, a chain, screw, nut, welding structure, manufacturing oil tank, etc.
Our company, KUNFENG can produce all sizes of 20Mn forged steel round bar, 20Mn forged square bar, 20Mn forged shafts and 20Mn forged blocks.