Mar 4 2013
Topics Covered
Introduction
Chemical Composition
Mechanical Properties
Other Designations
Manufacturing Process
Applications
Introduction
Stainless steel grade 317L is a low carbon version of grade 317 stainless steel. It has the same high strength and corrosion resistance as 317 steel but can produce stronger welds due to the low carbon content.
The following datasheet provides an overview of stainless steel grade 317L.
Chemical Composition
The chemical composition of grade 317L stainless steel is outlined in the following table.
|
Element |
Content (%) |
|
Iron, Fe |
Balance |
|
Chromium, Cr |
18-20 |
|
Nickel, Ni |
11-15 |
|
Molybdenum, Mo |
3-4 |
|
Manganese, Mn |
2 |
|
Silicon, Si |
1 |
|
Phosphorous, P |
0.045 |
|
Carbon, C |
0.03 |
|
Sulfur, S |
0.03 |
Mechanical Properties
The mechanical properties of grade 317L stainless steel are displayed in the following table.
|
Properties |
Metric |
Imperial |
|
Tensile strength |
595 MPa |
86300 psi |
|
Yield strength |
260 MPa |
37700 psi |
|
Modulus of elasticity |
200 GPa |
29000 ksi |
|
Poisson's ratio |
0.27-0.30 |
0.27-0.30 |
|
Elongation at break (in 50 mm) |
55% |
55% |
|
Hardness, Rockwell B |
85 |
85 |
Other Designations
Equivalent materials to grade 317L stainless steel are given below.
|
AISI 317L |
ASTM A167 |
ASTM A182 |
ASTM A213 |
ASTM A240 |
|
ASTM A249 |
ASTM A312 |
ASTM A774 |
ASTM A778 |
ASTM A813 |
|
ASTM A814 |
DIN 1.4438 |
QQ S763 |
ASME SA240 |
SAE 30317L |
Manufacturing Process
Machining stainless steel grade 317L requires low speeds and constant feeds to reduce its tendency to work harden. This steel is tougher than grade 304 stainless steel with a long stringy chip; however, using chip breakers is recommended. Welding can be performed using most of the conventional fusion and resistance methods. Oxyacetylene welding should be avoided. AWS E/ER 317L filler metal is recommended.
Conventional hot working processes can be performed. The material should be heated to 1149-1260°C (2100-2300°F); however, it should not be heated below 927°C (1700°F). To optimize corrosion resistance, a post-work annealing is recommended.
Shearing, stamping, heading and drawing are possible with grade 317L stainless steel, and post-work annealing is recommended to eliminate internal stresses. Annealing is performed at 1010-1121°C (1850-2050°F), which should be followed by rapid cooling.
Grade 317L stainless steel does not respond to heat treatment.
Applications
Grade 317L stainless steel is widely used in the following applications:
-
Condensers in fossil
-
Pulp and paper manufacturing
-
Nuclear fueled power generation stations
-
Chemical and petrochemical process equipment.