Ninthore Overseas is one of the Leading Manufacturer And Exporter Of High Quality Stainless Steel 317L Buttweld Fittings, which have somewhat higher thermal conductivities than the austenitic grades, which may be an advantage in certain applications. This expansion coefficient not only varies Stainless Steel 317L Elbow it also increases slightly with temperature. Stainless Steel 317L Reducer Butt Weld Pipe Fittings has a coefficient over the temperature range Zero Degree C to 100 Degree C, but increases above this temperature. The effect of thermal expansion in Stainless Steel 317L Tee Butt Weld Pipe Fittings is most noticeable where components are restrained, as the expansion results in buckling and bending.

Stainless Steel 317L Buttweld Fittings

Stainless Steel 317L Buttweld Fittings

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A problem can also arise if Stainless Steel 317L Cross Butt Weld Pipe Fittings are fabricated together and then heated, where dissimilar coefficients will again result in buckling or bending. In general, the quite high thermal expansion rates of the austenitic Stainless Steel 317L Bends mean that fabrications in these alloys may have more dimensional problems than similar fabrications in other alloy steels. Localized stresses from expansion during heating and cooling of Stainless Steel 317L Stub End Butt Weld Pipe Fittings can contribute to stress corrosion cracking in an environment which would not normally attack the metal.

These applications of Stainless Steel 317L End Cap require design to minimize the adverse effects of temperature differentials such as the use of expansion joints to permit movement without distortion and the avoidance of notches and abrupt changes of section.

Stainless Steel 317L Pipe Fittings Specifications
Specifications : ASTM A403 / ASME SA403
Size : 1/8” NB TO 48” NB. (Seamless & 100% X-Ray Welded, Fabricated)
: ASME/ANSI B16.9, ASME B16.28, MSS-SP-43
Thickness : 5s, 10s, 40s, 80s, 10, 20, 40, STD, 60, 80, XS, 100, 120, 140, 160, XXS available with NACE MR 01-75
Type : Seamless / Welded / Fabricated
SS 317L Pipe Fittings Chemical Composition
Grade C Mn Si P S Cr Mo Ni Fe
SS 317L 0.035 max 2.0 max 1.0 max 0.045 max 0.030 max 18.00 – 20.00 3.00 – 4.00 11.00 – 15.00 57.89 min
Stainless Steel 317L Butt weld Fittings Mechanical Properties
Density Melting Point Tensile Strength Yield Strength (0.2%Offset) Elongation
7.9 g/cm3 1400 °C (2550 °F) Psi – 75000 , MPa – 515 Psi – 30000 , MPa – 205 35 %
Equivalent Grades for 317L Stainless Steel Pipe Fitting
317L  1.4438 s31703      SUS 317L      –             –                –          X2CrNiMo18-15-4
SS WERKSTOFF NR.1.4438 Buttweld Pipe Fittings Application Industries
  • Off-Shore Oil Drilling Companies
  • Power Generation
  • Petrochemicals
  • Gas Processing
  • Specialty Chemicals
  • Pharmaceuticals
  • Pharmaceutical Equipment
  • Chemical Equipment
  • Sea Water Equipment
  • Heat Exchangers
  • Condensers
  • Pulp and Paper Industry
Stainless Steel 317L Buttweld Fitting Test Certificates

We at Ninthore Overseas provide Manufacturer TC (Test Certificate) in accordance to EN 10204/3.1B, Raw Materials Certificate, 100% Radiography Test Report, Third Party Inspection Report. We also provide Standard certificates like EN 10204 3.1 and additional requirement like. NACE MR 01075. FERRIT CONTENT as per norms if requested by clients.

• EN 10204/3.1B,
• Raw Materials Certificate
• 100% Radiography Test Report
• Third Party Inspection Report, etc

Material Testing
We at Ninthore Overseas ensure that all our materials go through strict quality tests before dispatching them to our clients.

• Mechanical Testing Such as Tensile of Area
• Hardness Test
• Chemical Analysis – Spectro Analysis
• Positive Material Identification – PMI Testing
• Flattening Test
• Micro and Macro Test
• Pitting Resistance Test
• Flaring Test
• Intergranular Corrosion (IGC) Test


• Commercial Invoice which includes HS Code
• Packing List including net weight and gross weight, number of boxes, Marks and Numbers
• Certificate of Origin legalized/attested by Chamber of Commerce or Embassy
• Fumigation Certificates
• Raw Material Test Reports
• Material Traceability Records
• Quality Assurance Plan (QAP)
• Heat Treatment Charts
• Test Certificates certifying NACE MR0103, NACE MR0175
• Material Test Certificates (MTC) as per EN 10204 3.1 and EN 10204 3.2
• Guarantee Letter
• NABL approved Laboratory Test Reports
• Welding Procedure Specification/Procedure Qualification Record, WPS/PQR
• Form A for the purposes of the Generalized System of Preferences (GSP)



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