Stockist & supplier ASTM A240 · ASME SA-240 · ASTM A480
SS 317L Plates — ASTM A240 UNS S31703
SS 317L plate is a low-carbon austenitic stainless steel plate with 3–4% molybdenum. Teshi Group stocks and supplies ASTM A240 / ASME SA-240 317L (UNS S31703) plate and sheet. Quotes are sent in 24–48 hours.
Also called: 317L plate, UNS S31703 plate, 1.4438 plate, SS 317 plate
What is an SS 317L Plate?
Type 317L is similar to 316L but with higher chromium, nickel and molybdenum (3.0–4.0%). The extra molybdenum gives better resistance to pitting and crevice corrosion in chlorides and to sulphuric, acetic and other acids. The low carbon limit (0.030%) protects welds against intergranular corrosion. 317L is used in flue gas desulphurisation scrubbers, pulp and paper bleach plants, chemical process vessels and condensers where 316L is marginal and a nickel alloy or super-austenitic grade is not justified.
Key features
- Stockist and supplier — sourced from stainless mills; Teshi does not manufacture plate
- ASTM A240 / ASME SA-240 Type 317L (UNS S31703)
- 3.0–4.0% molybdenum for chloride and acid resistance
- Low carbon for welded construction
- Plate and sheet; other sizes supplied against order
- Can be ordered together with flanges, fittings and fabrications manufactured by Teshi
Specification
| Supply | Stockist & supplier — Teshi Group, India |
|---|---|
| Standard | ASTM A240 / ASME SA-240; general requirements ASTM A480 |
| Grades | 317L (S31703) |
| Product forms | Plate (3/16 in / 4.76 mm and thicker per ASTM A480), sheet and coil; other sizes supplied against order |
| Condition | Solution annealed and descaled (pickled) |
| Finish | No.1 (hot rolled, annealed, pickled) for plate; 2B, BA or No. 4 for sheet |
| Other plate grades stocked | Carbon / boiler: IS 2062 E250–E450, ASTM A36, A516 Gr 60 / 70, A537; Cr-Mo: ASTM A387 Gr 11, 12, 22, 91; stainless: ASTM A240 304 / 304L / 304H, 309S, 310S, 316 / 316L / 316H / 316Ti, 317L, 321 / 321H, 347 / 347H, 410, 430, 904L, 254 SMO; duplex S31803 / S32205; super duplex S32750 / S32760; nickel: Monel 400 (B127), Inconel 600 (B168), Inconel 625 (B443), Incoloy 800 / 800H / 800HT (B409), Incoloy 825 (B424), Hastelloy C276 / C22 (B575), Hastelloy B2 / B3 (B333), Alloy 20 (B463), Nickel 200 / 201 (B162); titanium Gr 1, 2, 5, 7, 12 (B265); Cu-Ni 90/10, 70/30 (B171) |
| Testing | Chemical and tensile tests per A240; intergranular corrosion test (ASTM A262) when specified |
| Documents | Mill test certificate to EN 10204 3.1; EN 10204 3.2 / third-party inspection when the order specifies |
Applications
- Flue gas desulphurisation scrubbers
- Pulp and paper bleach plant
- Chemical process vessels
- Condensers and heat exchangers
- Textile and dye equipment
Chemical composition — 317L (ASTM A240)
| UNS | C | Mn | P | S | Si | Cr | Ni | Mo | N |
|---|---|---|---|---|---|---|---|---|---|
| S31703 (317L) | 0.030 | 2.00 | 0.045 | 0.030 | 0.75 | 18.0–20.0 | 11.0–15.0 | 3.0–4.0 | 0.10 |
Maximum unless a range is shown; % by weight. Per ASTM A240 Table 1.
Mechanical properties
| UNS | Tensile, min (MPa) | Yield 0.2%, min (MPa) | Elongation in 50 mm, min (%) | Hardness, max |
|---|---|---|---|---|
| S31703 | 515 | 205 | 40 | 217 HBW / 95 HRB |
Per ASTM A240 Table 2.
Technical data sheets
Dimensions & weights
FAQ
SS 317L Plate: common questions
What is the difference between 317L and 316L?
317L has more molybdenum (3.0–4.0% against 2.0–3.0%) and higher chromium and nickel, giving better pitting and acid resistance. Both have 0.030% maximum carbon. 317L is a step up where 316L is marginal.
Is 317L the same as 317?
No. 317L limits carbon to 0.030% for welded construction. Plate is generally supplied as 317L. The higher-carbon 317 is rarely stocked as plate today, because most welded equipment calls for the low-carbon grade.
When is 904L preferred over 317L?
904L has much higher nickel and copper and is used for stronger sulphuric acid and more aggressive chloride service. 317L is a lower-cost step up from 316L.
Does Teshi manufacture stainless plate?
No. Teshi Group is a stockist and supplier of SS 317L Plate, sourced from established mills and supplied with the original mill test certificate. Teshi is an OEM manufacturer of flanges, fittings, fasteners, valves and custom fabrications, which can be ordered with it.
Need a size or grade not listed here?
We source against your specification from approved mills, with mill test certificates and inspection before dispatch.
Send us your specificationTraceability
From mill heat to your site
- 01
Approved mill material
Received against the mill certificate; heat number registered.
- 02
Forging & machining
Heat number carried through every stage in our Indian works.
- 03
PMI, dimensional & NDT
Every lot inspected to the governing standard; TPI witness on request.
- 04
Stamped & certified dispatch
Hard-stamped pieces with EN 10204 3.1 / 3.2 certificates.
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Quote for SS 317L Plate in 24–48 hours
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