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317L Stainless Steel (UNS S31703) Chemistry Typical, Properties

DataTime:[2014-11-10]

317L Stainless Steel Description

Type 317L Stainless Steel (UNS 31703) is a low carbon austenitic chromium-nickel stainless steel that can be used in applications where it is not possible to anneal after welding and where maximum corrosion resistance is required. It provides good oxidation resistance in intermittent service to 1600°F and in continuous service to 1700°F.

Chemistry Typical

Carbon: 0.030 max   
Manganese: 2.00 max  
Silicon: 0.75 max   
Chromium: 18.00-20.00
Nickel: 11.00-15.00
Molybdenum: 3.00-4.00
Phosphorus: 0.045 max
Iron: Balance

Physical Properties

Density 0.29 lbs/in3,7.99 g/cm3
 
Electrical Resistivity, microhm-in (microhm-cm):
68°F (20°C):  31.19 (79.0)
 
Specific Heat: BTU/lb/°F (kJ/kg•K):
32-212°F (0-100°C):  0.12 (0.50)
 
Thermal Conductivity:  BTU/hr/ft2/ft/°F (W/m•K)
At 212°F (100°C): 9.4 (16.2)
At 932°F (500C): 12.4 (21.4)
 
Mean Coefficient of Thermal Expansion:in/in/°F (μm/m•K)
32 - 212°F (0 -100°C): 8.9 x 10-6(16.0)
32 - 600°F (0 -315°C): 9.0 x 10-6(16.2)
32 -1000°F (0 -538°C): 9.7 x 10-6 (17.5)
32 -1200°F (0 -649°C): 10.3 x 10-6 (18.5)
32 -1500ºF (0 -871ºC): 11.1 x 10-6 (18.5)
 
Modulus of Elasticity: ksi (MPa)
28.0 x 103 (193 x 103) in tension
11.2 x 103 (77 x 103) in torsion
 
Magnetic Permeability: H = 200 Oersteds: Annealed < 1.02 max.
Creep Strength: 1% Flow in 10,000hrs. At 1000°F : 24,000psi
 
Melting Range: °F (°C) 2500 - 2590 (1371 - 1421)

Forms

Stainless Steel Flanges - Slip on flanges, Blind flanges, Lap joint flanges, Welding neck flanges, Spectacle flanges, TG flanges, Socket welding flanges and Threaded flanges, Square flanges.
Stainless Steel Pipe Fittings - Butt Welding Fittings, Forged Fittings, 180 Degree Elbows, 90 Degree Elbows, 45 Degree Elbows, 30 Degree Elbows, Equal Tee, Reducing Tee, Concentric Reducer, Eccentric Reducer, Lap Joint Stub End, Cap, Cross.
Stainless Steel Pipes.

Mechanical Properties at Room Temperature

Properties: Annealed
Ultimate Tensile Strength: 75 KSI min (515 MPa min)
Yield Strength: (0.2% Offset) 30 KSI min (205 MPa min)
Elongation: 35% min
Hardness:  Rb 95 max

Properties: Tempered
Type 317L Stainless Steel can be cold rolled to tempers.  Contact Ulbrich Technical Services for more details.

AdditonalProperties

Corrosion Resistance 
See NACE (National Association of Corrosion Engineers) for recommendations.

Finishes

# 1 –Hot rolled annealed and descaled. It is available in strip, foil and ribbon. It is used for applications where a smooth decorative finish is not required.
# 2D  – Dull finish produced by cold rolling, annealing and descaling. Used for deep drawn parts and those parts that need to retain lubricants in the forming process. 
# 2B  –Smooth finish produced by cold rolling, annealing and descaling.  A light cold rolling pass is added after anneal with polished rolls giving it a brighter finish than 2D.
#BA  Bright annealed cold rolled and bright annealed
#CBA Course bright annealed  cold rolled matte finish and bright anneal
#2 Cold Rolled
# 2BA – Smooth finish produced by cold rolling and bright annealing. A light pass using highly polished rolls produces a glossy finish. A 2BA finish may be used for lightly formed applications where a glossy finish is desired in the formed part. 
Polished - Various grit finish for specific polish finished requirements

Wire Finishes

XC - Extra clean bright annealed or bright annealed and cold rolled
Grease - Ultra bright finish for decorative applications
Soap - Soap is not removed from tempered wire to act as a lubricant.

 

Cold Forming
Type 317L Stainless Steel can be readily formed and drawn.

Heat Treatment
Type 317L Stainless Steel is non hardenable by heat treatment and can only be hardened by cold working.

Welding
For best results refer to: SSINA's "Welding of Stainless Steel and Other Joining Methods".

Applications

Chemical Processing, Food Processing, Oil Refineries, Paper Mills, Gas Scrubbers, Photographic Handling, and Marine Parts.

Source: Yaang

For more information on this source please visit: Yaang Pipe Industry .

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