SUS317L、S31703

Stainless steel: SUS317L

Characteristics and scope of application:

SUS317L (00Cr19Ni13Mo3, UNS S31726) alloy is an austenitic stainless steel based on molybdenum. Compared with conventional chromium-nickel austenitic stainless steel such as 304 alloy, it has stronger resistance to chemical corrosion. In addition, compared with conventional stainless steel, 317L alloy 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-sensitizing properties during welding and heat treatment.

Compared with 316L, 317L steel has good seawater resistance and SCC resistance. It is used in chemical ships and chemical products such as chemical reactors that require high corrosion resistance.

 

chemical composition:

Grade	C≤	Si≤	Mn≤	S≤	P≤	Cr	Ni	Mo
SUS317L	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.