TP317LN Stainless steel 1.4434 (ONS 31753)

What is stainless steel 317LN？

Stainless steel 317LN is a nitrogen alloyed austenitic stainless steel having high nitrogen content than other austenitic stainless steels. It has higher yield and tensile strength than 317L. This low carbon grade steel provides resistance to sensitization during welding and thermal processes. Low carbon content in its composition makes the alloy resistant to inter granular corrosion. It also offers excellent corrosion resistance to organic, sulfuric and phosphoric acids.

317LN roestvrij staal 1.4434 Finished Products Form

• Coil – Strip
• Foil: Inquire with Ulbrich Stainless Steel Wire – Profile
• Round
• Flat
• Vierkant

Applications for 317LN roestvrij staal

• Chemical processing equipment
• Apparatuur voor voedselverwerking
• Pharmaceutical manufacturing equipment
• Marine engines and exhaust systems
• Offshore drilling platforms
• Aerospace components
• Power generation equipment
• Heat exchangers
• Boilers
• Turbines
• Piping systems
• Reactors
• Tanks
• Valves
• Springs

Equivalents of grade 317LN

JIS G4304	ASTM	ONS	KS	ISO Designation	Aisi
SUS317LN	317LN	S31753	STS317LN	X2CrNiMoN18-12-4	317LN

Chemical Composition

Elements	Fe	Cr	In	ma	Mn	En	N	P	C	S
Min (%)	57.9	18	11	3.0	–	–	0.1	–	–	–
Max (%)	67.9	20	15	4.0	2.0	0.75	0.22	0.045	0.030	0.030

Mechanische eigenschappen 

Eigenschappen	Metric	Imperial
Tensile strength	≥590 MPa	≥85600 psi
Yield strength	≥285 MPa	≥41300 ksi
Modulus of elasticity	200 GPa	29000 ksi
Shear modulus	77 GPa	11200 ksi
Poissons ratio	0.299	0.299
Elongation at break	≥40%	≥40%

Fysieke eigenschappen

Manufacturing process

The properties of 317LN is similar to other conventional austenitic stainless steels, and can therefore, be fabricated in a manner similar to alloys 316L and 317L. Heat treatment of 317LN can be carried out at temperatures ranging from 1080 to1175°C (1975 to 2150°F) followed by rapid water quenching. This grade is not hardenable.