20Mn round steel bar

20Mn carbon steel round bars hot rolled and forged with quality guarantee,resonable price. size:20-1000mm

20Mn carbon round steel bar

High welding 

Material :20Mn/SAE 1022/DIN C22

Origion:China

Application:some parts with high quality of centra and carburization

processing :hot rolled  and forged

dia:20mm-250mm(hot rolled)/160mm-1000mm (forged)

length :unlimited (can acc. to custmer's requirement)

delivery state: acid clearing/peel/heat treatment (hot rolled ) black surface/turning/heat treatment(forged) can be choosed.

standard:GB/T 699-1988(acc. to your request)

Chemical composition:

C :0.17~0.24	Si:0.17~0.37	Mn:0.70~1.00	S :≤0.035
P :≤0.035	Cr:≤0.25	Ni:≤0.25	Cu:≤0.25

mechanical property:

tensile strength σb (MPa):≥450(46)yield strength  σs (MPa):≥275(28)elogation:δ5 (%):≥24contraction ratio ψ (%):≥50hardness :≤197HB (without  heat treatment)

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20Mn round steel bar