SUS 634 precipitation hardening stainless steel AM-355, S35500

SUS634 (AM-355, S35500) precipitation hardening stainless steel overview:

634 stainless steel is American semi-austenitic precipitation hardening stainless steel. In 1954 and 1955 the American Allegheng Ludlum Company supplied AM350 and AM355. Semi-austenitic precipitation-hardening stainless steel has unique advantages: after solution, it has the advantages of austenitic steel, and is easy to cold-form; after the strengthening treatment, it has the advantages of martensitic steel, and the heat treatment temperature is not high. Defects of deformation and oxidation. However, when this kind of steel is used for a long time at a temperature of 315 ° C or higher, the intermetallic compound continues to precipitate and the material becomes brittle, so the use temperature is limited to 315 ° C or lower.

 

Chemical composition of SUS634 (AM-355, S35500) precipitation hardening stainless steel:

C	Cr	Ni	Mo	N
0.13	15.50	4.25	2.75	0.10

 

SUS634 (AM-355, S35500) precipitation hardened stainless steel

Thickness	Tensile strength/MPa	Yield strength/MPa	Elongation(50mm)/%	Hardness HRC
0.022-0.038	≥1140	≥1000	≥2	≥36
0.038-0.041	≥1140	≥1000	≥4	≥36
0.041-0.254	≥1140	≥1000	≥6	≥36
0.254-4.762	≥1140	≥1000	≥8	≥36
Slab
	≥1140	≥1000	≥8	≤40
Precipitation hardening (455 ° treatment)
	≥1310	≥1140	≥10	≤40
	≥1170	≥1035	≥12	≥37