Stainless Steel 317 / 317L Sheets & Plates
High molybdenum austenitic stainless steels, such as 317 and 317L, are designed for use in extremely corrosive chemical conditions that most other stainless steels, like 304 and 316, are unable to handle. Aashish Metal & Alloys offers all SS 317/317L Sheets, Plates, Coils, and Shims that conform to international technical standards like ASTM A240, ASME SA240 and DIN. We manufacture our stocks from reputed mills from around the world so that each stock has a consistent mechanical performance, dimensional accuracy and surface finish.
We have the technical expertise to help you from start to finish, whether you’re looking for standard stock sizes or custom-cut profiles to suit your project needs. Aashish Metal & Alloys supplies SS 317/317L sheets and plates to EPC contractors and fabricators in the petrochemical, pharmaceutical, pulp & paper, and offshore sectors across India and over 40 export markets.
What is Stainless Steel 317 / 317L?
317 and 317L stainless steel are 300 series molybdenum alloyed austenitic stainless steels. Grade 317 has a higher molybdenum content (3-4%) than SS 316, giving it improved resistance to pitting, crevice corrosion and chloride induced stress corrosion cracking. The low carbon form of SS 317 is known as Grade 317L (where the carbon is ≤ 0.035%). This is a useful grade for welded fabrications where sensitization and intergranular corrosion are not desired.
They are extremely resistant to sulfuric acid, phosphoric acid, hydrochloric acid and other corrosive solutions and are essential in chemical processes, pharmaceutical production and marine use.
Differentiators of SS 317 vs 317L
| Property | SS 317 | SS 317L |
|---|---|---|
| UNS Designation | S31700 | S31703 |
| Werkstoff Nr. | 1.4449 | 1.4438 |
| JIS Grade | SUS 317 | SUS 317L |
| Carbon Content (max) | 0.08% | 0.035% |
| Weldability | Good | Excellent (No sensitization) |
| Primary Advantage | Higher tensile strength | Better corrosion resistance post-weld |
- Chemical Composition of SS 317 / 317L Sheets & Plates
- Mechanical Properties of SS 317 / 317L Sheets & Plates
- Specifications of SS 317 / 317L Sheets, Plates & Coils
- Types of Stainless Steel 317 / 317L Products We Supply
- SS 317 / 317L Equivalent Grades — International Standards
- Industrial Applications of SS 317 / 317L Sheets & Plates
- SS 317L vs SS 316L — Grade Comparison
- Manufacturing Process & Quality Assurance
- Certifications & Standards Compliance
- SS 317 / 317L Sheet & Plate Price Indicator
- Frequently Asked Questions — SS 317 / 317L Sheets & Plates
Chemical Composition of SS 317 / 317L Sheets & Plates
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni |
|---|---|---|---|---|---|---|---|---|
| SS 317 (min) | — | — | — | — | — | 18.0 | 3.0 | 11.0 |
| SS 317 (max) | 0.08 | 2.0 | 1.00 | 0.040 | 0.030 | 20.0 | 4.0 | 14.0 |
| SS 317L (min) | — | — | — | — | — | 18.0 | 3.0 | 11.0 |
| SS 317L (max) | 0.035 | 2.0 | 0.75 | 0.040 | 0.030 | 20.0 | 4.0 | 15.0 |
Mechanical Properties of SS 317 / 317L Sheets & Plates
| Grade | Tensile Strength | Yield Strength | Elongation | Hardness (RB) | Density |
|---|---|---|---|---|---|
| SS 317 | 515–620 MPa | 205 MPa min | 35% min | ≤95 | 7.9 g/cm³ |
| SS 317L | 515–620 MPa | 205 MPa min | 35% min | ≤95 | 7.9 g/cm³ |
| 317L (Imperial) | 75,000 psi | 30,000 psi | 35% | 85 RB | 0.285 lb/in³ |
Specifications of SS 317 / 317L Sheets, Plates & Coils
| Parameter | Details |
|---|---|
| Standard | ASTM A240 / ASME SA240 |
| Thickness (Sheet/Coil) | Cold Rolled: 0.1 mm to 6.35 mm | Hot Rolled: 3.0 mm to 100 mm |
| Thickness (Plate) | 3.0 mm to 200 mm |
| Sheet / Plate Size | 1000×2000 mm | 1220×2440 mm | 1500×3000 mm | 2000×2000 mm | 2000×4000 mm | Custom |
| Coil Width | 1000 mm | 1219 mm | 1500 mm | 1800 mm | 2000 mm | 2500 mm | 3000 mm | 3500 mm |
| Coil Length | 2000 mm | 2440 mm | 3000 mm | 5800 mm | 6000 mm | As required |
| Surface Finish | 2B | 2D | BA | No.1 | No.4 | No.8 | Mirror | Hairline | Sandblast | Brush | Etching | Checkered |
| Forms Available | Sheet, Plate, Strip, Flat, Clad Plate, Coil, Foil, Shim, Blank, Circle, Perforated Sheet |
| Temper / Condition: | Soft (Annealed) | Quarter Hard | Half Hard | Hard | Spring Hard |
| Finish Process | Hot Rolled (HR) | Cold Rolled (CR) | SATIN (MPC) | Galvanized |
| Dimensional Standards | MSRR | AMS | BS | JIS | AISI | ASTM | DIN | EN | API |
Types of Stainless Steel 317 / 317L Products We Supply
SS 317 / 317L Shim Sheet
SS 317 / 317L Perforated Sheet
SS 317 / 317L Chequered Plate
SS 317 / 317L Hot Rolled Sheet
SS 317 / 317LCold Rolled Plate
SS 317 / 317L Strips
SS 317 / 317L Foils
SS 317 / 317L Coils
SS 317 / 317L Equivalent Grades — International Standards
| Grade | ASTM/UNS | Werkstoff Nr. | JIS | EN | AISI | BS |
|---|---|---|---|---|---|---|
| 317 | S31700 | 1.4449 | SUS 317 | — | 317 | — |
| 317L | S31703 | 1.4438 | SUS 317L | X2CrNiMo18-15-4 | 317L | — |
Industrial Applications of SS 317 / 317L Sheets & Plates
| Industry | Application Details |
|---|---|
| Chemical Processing | Reactor vessels, heat exchangers, condensers, storage tanks handling sulfuric & phosphoric acids |
| Petrochemical & Refining | Process columns, piping, valves, and fittings in crude oil refining and gas processing plants |
| Pharmaceutical | Process equipment, mixing tanks, clean-room paneling requiring superior hygiene and chemical inertness |
| Oil & Gas / Offshore | Subsea pipelines, offshore platforms, and equipment exposed to chloride-rich marine environments |
| Pulp & Paper | Digesters, bleaching tanks, washers, and thickeners exposed to harsh pulping chemicals |
| Food & Beverage | Food processing equipment, dairy machinery, and brewery tanks requiring non-reactive surfaces |
| Power Generation | Nuclear and thermal power plant condensers, heat exchanger tubes, and auxiliary process piping |
| Textile Industry | Dyeing machinery and acid treatment tanks in fabric processing |
| Shipbuilding | Hull components, deck fittings, and sea-water cooling systems |
| Construction | Architectural cladding, structural components in corrosive coastal environments |
SS 317L vs SS 316L — Grade Comparison
| Property | SS 317L | SS 316L |
|---|---|---|
| Molybdenum Content | 3.0–4.0% | 2.0–3.0% |
| Chromium Content | 18.0–20.0% | 16.0–18.0% |
| Nickel Content | 11.0–15.0% | 10.0–14.0% |
| Pitting Resistance | Superior | Good |
| Resistance to H2SO4 | Excellent | Good |
| Weldability | Excellent | Excellent |
| Cost | Higher | Lower |
| Best For | Aggressive chemical environments | General corrosive environments |
Manufacturing Process & Quality Assurance
- Reheating Furnace — Billets/slabs heated to precise rolling temperatures
- Scale Breaker — Surface descaling for clean base metal
- Hot Rolling / Finish Rolling — Achieving target thickness and width
- Cooling & Annealing — Controlled cooling to optimize grain structure
- Skin Pass Mill — Final cold reduction for surface finish and flatness
- Slitting, Shearing & Cutting — Custom dimensions to customer specifications
- Marking & Packing — Laser marking, wooden case, plywood box, or shrink-wrap packing
| Test Type | Purpose |
|---|---|
| PMI (Positive Material Identification) Test | Confirms alloy composition on-site |
| Hardness Test (Rockwell/Vickers) | Verifies mechanical strength compliance |
| Tensile & Yield Strength Test | Validates load-bearing capacity |
| IGC (Intergranular Corrosion) Test | Confirms low-carbon grade immunity to sensitization |
| Flattening & Flaring Test | Checks ductility and forming behavior |
| Micro & Macro Analysis | Internal grain structure evaluation |
| Third Party Inspection (TPI) | SGS, Bureau Veritas, or as per client requirement |
Certifications & Standards Compliance
- ASTM A240 / ASME SA240 — Standard specification for chromium and chromium-nickel stainless steel plate, sheet, and strip
- ISO 9001:2015 — Quality Management System certified facility
- EN 10088-2 — European standard for stainless steel flat products
- DIN 17440 — German standard for stainless steel sheet and strip
- JIS G4304/G4305 — Japanese Industrial Standard for stainless steel hot/cold rolled strips
- Mill Test Certificate (MTC) available per EN 10204 3.1 / 3.2 as required
- NABL / SGS / Bureau Veritas / TUV third-party certifications available on request
SS 317 / 317L Sheet & Plate Price Indicator
| Thickness Range | Form | Surface Finish | Approx. Price Range (INR/kg) |
|---|---|---|---|
| 0.5–2.0 mm | Cold Rolled Sheet | 2B / BA | ₹350–₹600 |
| 2.0–6.0 mm | Cold Rolled Sheet / Plate | 2B / No.1 | ₹320–₹550 |
| 6.0–25 mm | Hot Rolled Plate | No.1 / Pickled | ₹280–₹480 |
| >25 mm | Heavy Plate | As Rolled | ₹260–₹450 |
| 0.1–0.5 mm | Shim Sheet | 2B / BA | ₹600–₹900 |
Frequently Asked Questions — SS 317 / 317L Sheets & Plates
SS 317 and 317L are both molybdenum-alloyed austenitic stainless steels with the same base composition, but 317L has a maximum carbon content of 0.035% compared to 0.08% in standard 317. This lower carbon in 317L prevents sensitization during welding, making it the preferred grade for any application involving welded joints or heat-affected zones.
Yes, in aggressive chemical environments. SS 317L contains 3–4% molybdenum versus 2–3% in 316L, giving it superior resistance to pitting corrosion, sulfuric acid, and chloride attack. For moderate-corrosion environments, 316L is cost-effective, but for harsh acid services, 317L outperforms 316L significantly.
Standard sheet sizes include 1000×2000 mm, 1220×2440 mm, 1500×3000 mm, and 2000×4000 mm. Thickness ranges from 0.1 mm (shim) to over 100 mm (heavy plate). Aashish Metal & Alloys can supply custom-cut sizes as per your project drawings.
We supply SS 317L plates in 2B, 2D, BA (Bright Annealed), No.1 (Hot Rolled Annealed Pickled), No.4, No.8 (Mirror), Hairline, Checkered, Sandblasted, and Brushed finishes. Surface finish selection depends on the application — industrial grades typically use No.1 or 2B, while decorative and food-grade applications prefer BA or Mirror finishes.
The price of SS 317L sheets in India typically ranges from ₹280 to ₹600 per kg depending on thickness, surface finish, mill brand, and order quantity. Thinner cold-rolled grades with special finishes are priced higher. Contact Aashish Metal & Alloys for a current, quantity-specific quotation.
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