Steel 68A

Designation

Steel 68A applies: for the production of hot-rolled billet and heat-treated wire diameter 1.2−5.5 mm, intended for the manufacture of springs.

Name	Code	Standards
Steel wire medium and high carbon	В72	GOST 1071-81
Blanks. Of the workpiece. Slabs	В31	TU 14-1-1698-76

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu	Al
GOST 1071-81	0.65-0.7	≤0.025	≤0.025	0.4-0.55	≤0.12	0.15-0.25	≤0.2	Rest	≤0.15	≤0.05

Fe is the basis.

Section, mm	σ_U, MPa
The wire spring heat-treated in the delivery condition according to GOST 1071-81
1.2-5.5	2060-1270

Name	Description
σ_U	Limit short-term strength