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Description: 317L is molybdenum-bearing austenitic stainless steels with greatly increased resistance to chemical attack as compared to the conventional chromium-nickel austenitic stainless steels such as SS304. 317L offers higher creep, stress-to-rupture, and tensile strengths at elevated temperatures than conventional stainless steels.

Composition:

Carbon	Manganese	Silicon	Chromium	Nickel
0.03	2.00	0.75	18 ~ 20	11 ~ 15
Molybdenum	Phosphorus	Sulfur	Nitrogen	Iron
3 ~ 4	0.04	0.03	0.1	Balance

Resistance to Corrosion:
317L is more resistant to atmospheric and other mild types of corrosion than conventional chromium-nickel stainless steels;
317L is considerably more resistant than conventional chromium-nickel types to solutions of sulfuric acid;
At the temperature under 38oC, Alloy 317L have excellent resistance to solution of higher concentration;
317L also provide superior resistance to intergranular attack.
317L is less susceptible than 316 and lower alloy stainless steel to pitting or crevice corrosion in acidic solutions containing chlorides or other halide ions.

Oxidation Resistance:
317L have excellent resistance to oxidation and a low rate of scaling in ordinary atmospheres at temperature up to 1600oC

Fabrication:
The physical and mechanical properties of 317L is similar to those of more conventional austenitic stainless steel and can , therefore, be fabricated in a manner similar to 304 and 316.

Mechanical Properties:

0.2% Yield Strength Mpa	Ultimate Tensile Strength MPa	Elongation %	Hardness, Max
205	515	40	217 BHN

Physical Properties:
Density: 8.0 g/cm3
Melting Range: 1320 ~ 1400 ^oC