317L Stainless Steel Seamless Pipes & Tubes |
317L Stainless Steel Welded Pipes & Tubes |
Chemical Composition in Weight Percent per ASTM A240 for Cited Alloys |
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Element |
Type 317L |
Type 317LMN |
Carbon |
0.03 max |
0.03 max |
Manganese |
2.00 |
2.00 |
Silicon |
0.75 max |
0.75 max |
Chromium |
18.00 - 20.00 |
17.00 - 20.00 |
Nickel |
11.00 - 15.00 |
13.50 - 17.50 |
Molybdenum |
3.00 - 4.00 |
4.00 - 5.00 |
Phosphorus |
0.04 max |
0.04 max |
Sulfur |
0.03 max |
0.03 max |
Nitrogen |
0.10 max |
0.10 - 0.20 |
Iron |
Balance |
Balance |
UNS No. |
S31703 |
S31726 |
Corrosion Resistance in Boiling Solutions and ASTM Tests | ||||
Test |
Corrosion Rate in Mils per Year (mm/y) |
|||
Alloy |
Alloy |
Alloy |
Alloy |
|
20% |
0.12 |
0.48 |
0.12 |
0.48 |
45% |
23.41 |
18.37 |
11.76 |
2.76 |
10% |
48.03 |
44.90 |
35.76 |
11.24 |
20% |
0.06 |
0.72 |
0.24 |
0.36 |
10% |
635.7 |
298.28 |
157.80 |
13.93 |
10% |
71.57 |
55.76 |
15.60 |
2.64 |
50% |
77.69 |
32.78 |
85.68 |
17.77 |
ASTM A262 |
26.04 |
20.76 |
17.28 |
264.5 |
ASTM A262 |
22.31 |
19.68 |
16.32 |
908.0 |
ASTM A262 |
Pass |
Pass |
Pass |
Pass |
The low carbon (less than 0.03%) of these alloys effectively prevents sensitization to intergranular corrosion during thermal processes such as welding or forging. The higher chromium contents of 317LMN and Alloy 317L stainless steels also provide superior resistance to intergranular attack. It should be noted that prolonged exposure in the range 800 to 1400°F (427-816°C) can be detrimental to intergranular corrosion resistance and may also cause embrittlement due to precipitation of sigma phase. The higher nitrogen content of the 317LMN alloy retards the precipitation of sigma phase as well as carbides.
Pitting Resistance Equivalents |
|
Alloy |
PRE |
Alloy 316 |
25 |
Alloy 317L |
30 |
Alloy 317LMN |
38 |
Alloy 625 |
52 |
Alloy C276 |
69 |
High molybdenum and nitrogen contents can significantly improve pitting resistance as illustrated in the preceding table of Pitting Resistance Equivalents (PRE). The PRE is based on the results of corrosion tests in which it was found that nitrogen was 30 times more effective than chromium and approximately 9 times more effective than molybdenum in enhancing chloride pitting resistance.
The temperature of the onset of crevice corrosion as determined in a modified AST G-48B test is a useful means of ranking the relative resistance of stainless and nickel-base alloys. The Critical Crevice Corrosion Temperatures table that follows demonstrates that crevice corrosion resistance for austenitic stainless steels increases with the alloy’s molybdenum and nitrogen content.
Crevice Corrosion in a Simulated FGD System Environment |
|||
Alloy |
Weight Loss (g/cm2) |
||
24°C |
50°C |
70°C |
|
Alloy 317L |
0.0007 |
0.0377 |
0.0500 |
Alloy 317LMN |
0.0000 |
0.0129 |
0.0462 |
Alloy 625 |
0.0000 |
0.0000 |
0.0149 |
Alloy C276 |
0.0000 |
0.0001 |
0.0004 |
*72-hour exposure based on ASTM G-48B procedure using the following solution:
7 vol.%H2SO4, 3 vol%HCI, 1 wt% CuCl2, 1 wt%FeCl3
Oxidation Resistance
The chromium-nickel-molybdenum steels all have excellent resistance to oxidation and a low rate of scaling in ordinary atmospheres at temperatures up to 1600-1650°F (871-899°C).
Fabrication
The physical and mechanical properties of 317LMN and Alloy 317L stainless steels are similar to those of more conventional austenitic stainless steels and can, therefore, be fabricated in a manner similar to Alloys 304 and 316.
Mechanical Properties
The ASTM specified minimum tensile properties and maximum hardness for annealed plate, sheet, and strip products are shown in the following table.
Minimum Mechanical Properties per ASTM A-240 for Cited Alloys |
||
Property |
Alloy 317L |
Alloy 317LMN |
Ultimate Tensile Strength, ksi (MPa) |
75 |
80 |
0.2% Yield Strength, ksi (MPa) |
30 |
35 |
% Elongation in 2″ (5.1 cm) |
40 |
40 |
Hardness, Maximum |
217BHN |
- |
UNS No. |
S31703 |
S31726 |
Physical Properties
The physical property data which follows represent the iron-chromium-nickel-molybdenum class of stainless steels. For all practical purposes, the data are applicable to 317LMN and Alloy 317L stainless steels. All properties are at room temperature (68°F, 20°C) unless stated otherwise.
Density |
0.29 |
lb/in3 |
Modulus of Elasticity |
29•106 |
psi |
Melting Range |
2410 to 2550 |
° F |
Thermal Conductivity |
100.8 |
Btu/ft2-hr-°F-in |
Coefficient of Thermal Expansion |
9.2 (16.5) |
10-6/°F (10-6/°C) |
Specific Heat |
0.11 |
Btu/lb-°F |
Electrical Resistivity |
31.1 |
µ-ohm-in |
Magnetic Permeability |
1.0028 |
µ at H = 200 oe |
Utmost care is taken towards Packing of the finished products so as to ensure that the resultant Coils, Foils, Tubes, Pipes and Fittings reach in the same condition as desired by our valued customers.
Packing specifications for various products are:
317L Stainless Steel Seamless Tube Packaging |
317L Stainless Steel Seamless Tube Packed |
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List of Countries where Advance Steel & Tube Mills supply 317L Stainless Steel Seamless Pipes & Tubes :- |
List of Countries where Advance Steel & Tube Mills supply Pipes / Tubes :- |
Mumbai, Bengaluru, Chennai, New Delhi, Pimpri-Chinchwad, Hyderabad, Pune, Kolkata, Navi Mumbai, Ahmedabad, Noida, Vadodara, Coimbatore, Thane, Chandigarh, Indore, Dammam, Surat, Bhopal, Faridabad, Rajkot, Ernakulam, Secunderabad, Thiruvananthapuram, Howrah, Visakhapatnam, Ludhiana, Haryana, Houston, Dubai, Seoul, Singapore, Abu Dhabi, Tehran, Calgary, Riyadh, London, Jakarta, Istanbul, Bangkok, Kuwait City, Sharjah, Muscat, Edmonton, Busan, Mexico City, Doha, Jeddah, Aberdeen, Cairo, Geoje-si, Perth, Santiago, Kuala Lumpur, Rio de Janeiro, Melbourne, Madrid, Ulsan, La Victoria, Bogota, Lahore, Los Angeles, Algiers, Chiyoda, Ankara, Ho Chi Minh City, Toronto, Moscow, Dallas, Colombo, Hong Kong, Brisbane, Petaling Jaya, Gimhae-si, Al Jubail, Port-of-Spain, Milan, Lagos, Hanoi, Ahvaz, Karachi, New York, Caracas, Vung Tau, Al Khobar, Manama, Montreal, Granada, Courbevoie, Sydney
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