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UNS S31703 Stainless steel
Stainless steel
317L Stainless steel
UNS S31703 Stainless steel

UNS S31703 stainless

317L is molybdenum-bearing austenitic stainless steel with greatly increased resistance to chemical attack as compared to the conventional chromium-nickel austenitic stainless steels such as Type 304. 317L alloy also offers higher creep, stress-to-rupture, and tensile strength at elevated temperatures than conventional stainless steels.
Product information

317L is molybdenum-bearing austenitic stainless steel with greatly increased resistance to chemical attack as compared to the conventional chromium-nickel austenitic stainless steels such as Type 304. 317L alloy also offers higher creep, stress-to-rupture, and tensile strength at elevated temperatures than conventional stainless steels. The alloy has low carbon to provide resistance to sensitization during welding and other thermal processes. This alloy is intended for severe service conditions such as flue gas desulfurization (FGD) systems.
 

Technical data
Chemical Composition - Stainless Steel 317/317L
Grade 317 317L
UNS Designation S31700 S31703
Carbon (C) Max. 0.08 0.035*
Manganese (Mn) Max. 2.00 2.00
Phosphorous (P) Max. 0.040 0.04
Sulphur (S) Max. 0.03 0.03
Silicon (Si) Max. 1.00 1.00
Chromium (Cr) 18.0–20.0 18.0–20.0
Nickel (Ni) 11.0–14.0 11.0–15.0
Molybdenum (Mo) 3.0–4.0 3.0–4.0
Nitrogen (N)
Iron (Fe) Bal. Bal.
Other Elements

Typical Mechanical Properties- Stainless Steel 317L
Material Ultimate Tensile Strength (Mpa) 0.2 % Yield Strength (Mpa) % Elongation in 2" Rockwell B Hardness
Alloy 317 515 205 35 95
Alloy 317L 515 205 40 95
Minimum Mechanical Properties by ASTM A240 and ASME SA 240
Physical Properties Metric English Comments
Density 8 g/cc 0.289 lb/in³  
Mechanical Properties
Hardness, Brinell Max 217 Max 217 ASTM A240
Tensile Strength, Ultimate Min 515 MPa Min 74700 psi ASTM A240
Tensile Strength, Yield Min 205 MPa Min 29700 psi ASTM A240
Elongation at Break Min 40 % Min 40 % ASTM A240
Modulus of Elasticity 200 GPa 29000 ksi  
Electrical Properties
Electrical Resistivity 7.9e-005 ohm-cm 7.9e-005 ohm-cm  
Magnetic Permeability 1.0028 1.0028 fully annealed 0.5″ plate; 1.0028 65% cold-worked 0.5″ plate
 
317L(1.4438) General Property
Alloy 317LMN and 317L are molybdenum-bearing austenitic stainless steel tube with greatly increased resistance to chemical attack as compared to the conventional chromium-nickel austenitic stainless steel pipe such as Alloy 304. In addition, 317LMN and 317L alloys offer higher creep, stress-to-rupture, and tensile strengths at elevated temperatures than conventional stainless steels. All are low carbon or "L" grades to provide resistance to sensitization during welding and other thermal processes.

The "M" and "N" designations indicate that the compositions contain increased levels of molybdenum and nitrogen respectively. The combination of molybdenum and nitrogen is particularly effective in enhancing resistance to pitting and crevice corrosion, especially in process streams containing acids, chlorides, and sulfur compounds at elevated temperatures. Nitrogen also serves to increase the strength of these alloys. Both alloys are intended for severe service conditions such as flue gas desulfurization (FGD) systems.

In addition to excellent corrosion resistance and strength properties, the Alloys 316, 316L, and 317L Cr-Ni-Mo alloys also provide the excellent fabricability and formability which are typical of the austenitic stainless steel tubing .

317L (1.4438) Heat Treatment
Annealing
The austenitic stainless steel pipe are provided in the mill annealed condition ready for use. Heat treatment may be necessary during or after fabrication to remove the effects of cold forming or to dissolve precipitated chromium carbides resulting from thermal exposures. For the Alloys 316 and 317L the solution anneal is accomplished by heating in the 1900 to 2150°F (1040 to 1175°C) temperature range followed by air cooling or a water quench, depending on section thickness. Cooling should be sufficiently rapid through the 1500 to 800°F (816 to 427°C) range to avoid reprecipitation of chromium carbides and provide optimum corrosion resistance. In every case, the metal should be cooled from the annealing temperature to black heat in less than three minutes.

Forging
The recommended initial temperature range is 2100-2200°F (1150-1205°C) with a finishing range of 1700-1750°F (927-955°C).

Annealing
317LMN and Alloy 317L stainless steels can be annealed in the temperature range 1975-2150°F (1080-1175°C) followed by an air cool or water quench, depending on thickness. Plates should be annealed between 2100°F (1150°C) and 2150°F (1175°C). The metal should be cooled from the annealing temperature (from red/white to black) in less than three minutes.

Hardenability
  • These grades are not hardenable by heat treatment.
  • Alloys 316 and 317L stainless steel tube cannot be hardened by heat treatment.

FAQ
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Q:Do you provide samples?is it free or extra?
A:The sample could can provide for customer with free,but the courier freight will be covered by customer account.
Q:Do you accept the third party inspection?
A:Yes absolutely we accept.
Q:What are your main products?
A:Carbon steel,alloy steel,stainless steel plate/coil,pipe and fittings,sections etc.
Q:Can you accept the order of customzied?
A:Yes,we assure.
 

  
  

 

  
  

 

  

 

  

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