317S12、Z2CND19.15、Z3(2)CND19-15-04

Characteristics and scope of application:
317S12 is an austenitic stainless steel based on molybdenum. Compared with conventional chromium-nickel austenitic stainless steel such as 304S16, it has stronger chemical resistance. In addition, compared with conventional stainless steel, 317S12 has higher ductility, stress corrosion resistance, compressive strength and high temperature resistance. It is a low carbon grade or L grade. This grade has anti-sensitization properties during welding and heat treatment.
Compared with 316S12, 317S12 steel has good seawater resistance and SCC resistance. It is used in chemical ships and chemical equipment that require high corrosion resistance.

chemical composition:

Grade	C≤	Si≤	Mn≤	S≤	P≤	Cr	Ni	Mo
317S12	0.03	1.00	2.00	0.030	0.045	18.00 20.00	11.00 15.00	3.00 4.00

 

Mechanical properties:

Tensile strength σb (MPa): ≥481

Conditional yield strength σ0.2 (MPa): ≥176

Elongation δ5 (%): ≥40

Section shrinkage ψ (%): ≥60

Hardness: ≤187HB; ≤90HRB; ≤200HV

 

Heat treatment specifications and metallographic structure:

Heat treatment specifications:

Solution: 1010 ～ 1150 ℃, fast cooling.

Microstructure:

The organization is characterized by austenite type.