Stainless SteelOthers
Overview
ASTM A403 317L stub ends are wrought austenitic stainless steel butt-welded lap-joint fittings manufactured under ASTM A403 / A403M (Standard Specification for Wrought Austenitic Stainless Steel Piping Fittings). A stub end is butt-welded to the end of a pipe and used in combination with a free-floating lap joint flange (backing flange) to form a flanged connection. 317L (UNS S31703) is a low-carbon, high-molybdenum (3.0β4.0%) austenitic stainless steel that provides significantly enhanced corrosion resistance over 316L, particularly in sulfuric acid, chloride-containing, and high-temperature process environments. The low-carbon grade (L, β€0.030% C) ensures no intergranular corrosion after welding.
Size Range
- 1/2-24"
Grade Specification
| System | Value |
|---|---|
| πΊπΈ UNS | S31703 |
| ASTM / ASME | A403 WP317L, A182 F317L, A312 TP317L, A240 Type 317L |
| πͺπΊ EN | EN 1.4438 (X2CrNiMo18-14-4) |
| π©πͺ DIN | W-Nr. 1.4438, X2CrNiMo18-14-4, Werkstoff 1.4438 |
| π―π΅ JIS | SUS 317L, JIS G4303 (bars), JIS G4305 (sheet), JIS B2311 (butt-weld fittings) |
| π¨π³ GB | 00Cr19Ni13Mo3 (old) / 022Cr19Ni13Mo3 (new GB/T 20878) |
| π·πΊ GOST | 03Kh17N14M3, GOST 9941 (seamless pipe) |
| π¦πΊ AS | AS 1528, AS 3679 Grade 317L, AS 4041 butt-weld fittings |
| AWS | ER317L (TIG/MIG), E317L (SMAW), A5.9 / A5.4 |
Chemical Composition
| Element | Value |
|---|---|
| C | 0.030 |
| Mn | 2.00 |
| Si | 0.75 |
| P | 0.045 |
| S | 0.030 |
| Cr | 18-20 |
| Ni | 11-15 |
| Mo | 3-4 |
| Cu | 1 |
| Ni | 0.1 |
| Nickel + Copper (Ni + Cu) | 16 |
| Co | 0.2 |
| Ti | 0.1 |
| Nb | 0.1 |
| Fe | Remainder |
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength, ksi (MPa) | 70 ksi (485 MPa) |
| Yield Strength @ 0.2% Offset, ksi (MPa) | 25 ksi (170 MPa) |
| Elongation in 2 in / 50 mm (%) | 30 |
Physical Properties
| Property | Unit | Value |
|---|---|---|
| Density (g/cmΒ³) | g/cmΒ³ | 8.00 |
Applications
- Chemical Processing
- Pulp & Paper (Primary Market for 317L)
- Flue Gas Desulfurization (FGD)
- Petroleum Refining & Petrochemical
- Pharmaceutical & Biotech (Electropolished Variants)
- Marine & Desalination
- Food Processing
- Power Generation
- Mining & Hydrometallurgy