TOBO STEEL GROUP CHINA
TOBO GROUP TOBO International Trading(Shanghia)Co.,Ltd Tianda Oil Pipe Co., Ltd TOBO Pipeline Equipment Co.,Ltd TPCO & TISCO Pipe(Tianjin)Co.,Ltd.
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Astm A403 Wp317/ 317 But Weld Fittings Short / Long Pipe Stub End , Lap Joint Stub End 1” To 60” Sch10s To Sch160s
317L is a molybdenum containing austenitic stainless steel, with improved corrosion resistance over 304/304L and 316/316L stainless steel. The increased levels of chromium, nickel and molybdenum over 316L stainless steel improve chloride pitting resistance and general corrosion. Through the controlled addition of nitrogen it is common for 317L to meet the mechanical properties of 317 straight grade, while maintaining a low carbon content.
| Ni | Cr | Mo | Mn | Si | C | N | S | P | Fe | |
|---|---|---|---|---|---|---|---|---|---|---|
| MIN | 11.0 | 18.0 | 3.0 | - | - | - | - | - | - | - |
| MAX | 15.0 | 20.0 | 4.0 | 2.0 | 0.75 | 0.03 | 0.1 | 0.03 | 0.045 | Balance |
ASME SA 240
ASTM A 240
UNS S31703
W. NR./EN 1.4438
317L Coil, 317L Plate, 317L Welding Products
Density: 0.285 lb/inch3
Melting Point: 2540 - 2630°F
Poisson's Ratio: 0.3
Electrical Resistivity: 475 Ohm-circ mil/ft
Physical Properties of 317/317L Alloys in the Annealed Condition at -20°F to +100°F
| Tensile Strength | Yield | |||||||||||||
| Alloy | UNS Desig | Spec. | psi | MPa | ksi | psi | MPa | ksi | Elongation in 2 inches (min.) % | Grain Size Req. | Max. Har | Modulus of Elasticity (x106 psi) | Mean Coefficient of Thermal Expansion (IN./IN./°F x 10-6) | Thermal Conductivity (BTU-in/ |
| 317 | S31700 | A249, A312 | 75,000 | 515 | 75 | 30,000 | 205 | 30 | 35 | — | 90 Rb | 28.0 | 9.2 | 116 |
| 317L | S31703 | A249, A312 | 70,000 | 485 | 70 | 25,000 | 170 | 25 | 35 | — | 90 Rb | 28.0 | 9.2 | 116 |
Composition of 317/317L tubing and pipe
| 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 | — | — |
* Maximum carbon content of 0.04% acceptable for drawn tubes
| Alloy | UNS Designation | Werkstoff NR. | Specifications* |
| 317 | S31700 | — | A269, A/SA249, A/SA312 |
| 317L | S31703 | 1.4438 | A269, A/SA249, A/SA312 |
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| Product name : lap joint stub end | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Item : buttweld-Lap Joint Stub End | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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