GB/T 699 40 Steel — Specifications & Listings

GB/T 699

40 steel is a medium carbon steel offering good strength, toughness, and wear resistance after heat treatment. The grade is suitable for moderately loaded mechanical components.

Category: Carbon Steel

Grade Details

Grade	GB/T 699 40
Standard	GB/T 699
Description	40 steel is a medium carbon steel offering good strength, toughness, and wear resistance after heat treatment. The grade is suitable for moderately loaded mechanical components.
Applications	Used for gears, shafts, axles, crankshafts, couplings, and machine spindles.

Chemical Composition (%)

C	Si	Mn	P	S
0.37-0.44	0.17-0.37	0.50-0.80	0.035 max	0.035 max

Mechanical Properties

tensile_strength	600-760 MPa
yield_strength	355-490 MPa
elongation	14-20%
hardness	170-220 HB

Active GB/T 699 40 Listings on M-EX

No active GB/T 699 40 listings at this time.