GB/T 699 55 Steel — Specifications & Listings

GB/T 699

55 steel is a high carbon structural steel with good wear resistance and high hardness after heat treatment. The grade is suitable for springs and high-strength mechanical parts.

Category: Carbon Steel

Grade Details

Grade	GB/T 699 55
Standard	GB/T 699
Description	55 steel is a high carbon structural steel with good wear resistance and high hardness after heat treatment. The grade is suitable for springs and high-strength mechanical parts.
Applications	Used for springs, wear plates, shafts, rollers, high-strength pins, and machine tools.

Chemical Composition (%)

C	Si	Mn	P	S
0.52-0.60	0.17-0.37	0.50-0.80	0.035 max	0.035 max

Mechanical Properties

tensile_strength	700-900 MPa
yield_strength	420-600 MPa
elongation	10-16%
hardness	200-260 HB

Active GB/T 699 55 Listings on M-EX

No active GB/T 699 55 listings at this time.