SUS317J1 Stainless Steel
SUS317J1 Stainless Steel: High-Corrosion Resistance Austenitic Plate & Coil
Comprehensive material data for SUS317J1 stainless steel including composition, mechanical properties, thermal properties, equivalents, and application guidance.
Hot rolling, Cold rolling, Cutting, Bending, Welding, Forming
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SUS317J1 Stainless Steel Introduction
SUS317J1 is an austenitic stainless steel standardized under JIS G4304 and G4305 for hot-rolled and cold-rolled plates, sheets, and coils. It features a higher nickel content (15.00–17.00%) and molybdenum addition (3.00–4.00%) compared to standard 304/316 grades, providing enhanced resistance to pitting and crevice corrosion in chloride-containing environments. Its balanced composition delivers good mechanical strength, excellent formability, and weldability, making it suitable for a wide range of industrial applications in chemical processing, marine equipment, and heat exchangers. The grade is delivered in solution-annealed condition and offers a combination of moderate cost and superior corrosion resistance.
SUS317J1 Stainless Steel Chemical Composition
The chemical composition of SUS317J1 as specified in JIS G4304:2005 and JIS G4305:2005. All values are in weight percent. Niobium, titanium, or nitrogen may be present in trace amounts for stabilization but are not specified for this grade. The molybdenum content is the key element for enhanced chloride corrosion resistance.
| Chemical Element | Standard Value | Remarks |
|---|---|---|
| Carbon (C) | ≤0.040 | |
| Silicon (Si) | ≤1.00 | |
| Manganese (Mn) | ≤2.00 | |
| Phosphorus (P) | ≤0.045 | |
| Sulfur (S) | ≤0.030 | |
| Nickel (Ni) | 15.00 – 17.00 | |
| Chromium (Cr) | 18.00 – 20.00 | |
| Molybdenum (Mo) | 3.00 – 4.00 |
SUS317J1 Stainless Steel Thermal and Electrical Physical Properties
Typical physical properties for SUS317J1 austenitic stainless steel at room temperature unless noted. Thermal expansion and conductivity values are average over the indicated temperature range. Density is approximate; slight variations occur with actual composition.
| Property | Standard Value (Typical) | Unit | Test Condition |
|---|---|---|---|
| Density (ρ) | 8.0 | g/cm³ | 20°C |
| Elastic Modulus (E) | 193 | GPa | 20°C |
| Shear Modulus (G) | 74 | GPa | 20°C |
| Poisson's Ratio (ν) | 0.30 | – | 20°C |
| Thermal Expansion Coefficient (α) | 16.0 | 10⁻⁶/K | 0 to 100°C |
| Thermal Expansion Coefficient (α) | 16.6 | 10⁻⁶/K | 0 to 300°C |
| Thermal Expansion Coefficient (α) | 17.5 | 10⁻⁶/K | 0 to 500°C |
| Thermal Conductivity (λ) | 14.0 | W/(m·K) | 100°C |
| Thermal Conductivity (λ) | 16.0 | W/(m·K) | 300°C |
| Thermal Conductivity (λ) | 19.0 | W/(m·K) | 500°C |
| Specific Heat Capacity | 500 | J/(kg·K) | 20°C |
| Electrical Resistivity (ρ_e) | 0.74 | μΩ·m | 20°C |
SUS317J1 Stainless Steel Mechanical Properties
Mechanical properties for SUS317J1 plates/coils at room temperature per JIS G4304 (thickness ≤50 mm). Elongation values depend on thickness; typical minimum for sheet/strip is 40%. Impact toughness (Charpy V-notch) is not routinely specified in JIS but is generally >100 J at ambient temperature. Bending test requirements are commonly 180° bend without cracking for sheet thickness.
| Property | Standard Requirement (Typical) | Unit | Test Condition |
|---|---|---|---|
| Yield Strength (ReH) | ≥205 | MPa | Room temperature, 0.2% offset |
| Tensile Strength (Rm) | ≥520 | MPa | Room temperature |
| Elongation (A) | ≥40 | % | Gauge length 50 mm, sheet/strip thickness ≤6 mm |
| Elongation (A) | ≥40 | % | Gauge length 50 mm, plate thickness >6 mm to ≤50 mm |
| Bending Test | 180° bend, d = 2t | – | Bend diameter: 2 times thickness (t ≤10 mm) |
| Hardness | ≤187 | HBW | Brinell hardness or equivalent |
SUS317J1 Stainless Steel Direct Equivalent Material Standards and Substitution Grade Recommendations
| Country/Region | Standard | Grade | Remarks |
|---|---|---|---|
| Japan | JIS G4304/G4305 | SUS317J1 | Original grade, full compliance |
| No exact direct international equivalent exists | – | – | SUS317J1 has unique Ni range (15.00–17.00%) and C ≤0.040; closest alternatives are 317L grades |
SUS317J1 Stainless Steel Application Introduction
SUS317J1 is selected for environments requiring superior resistance to pitting and crevice corrosion, particularly where chlorides are present. Its higher nickel content also improves stress corrosion cracking resistance. The material is easily formed and welded by conventional methods.
- Excellent corrosion resistance in acidic and alkaline media.
- Good mechanical properties at elevated temperatures up to ~550°C.
- Commonly used in fabricated equipment such as tanks, piping, and heat exchangers.
Product Applications: Storage tanks and pressure vessels, Heat exchanger plates and tubes, Piping and flanges for corrosive media, Reactor vessels and agitators, Bleaching equipment in paper mills, Marine hardware and fasteners
Processed into products: Welded and seamless pipe fittings, Valve bodies and trim components, Pump casings and impellers, Column internals and trays, Flue gas scrubber internals, Fasteners exposed to saltwater spray
Application industries: Chemical Processing, Petrochemical and Refining, Marine Engineering, Pulp and Paper, Power Generation (flue gas desulfurization), Food and Beverage Processing
SUS317J1 Stainless Steel Close/Similar Alternative Material Recommendations
| Country/Region | Standard | Grade | Remarks |
|---|---|---|---|
| USA | ASTM A240 | 317L (UNS S31703) | Lower carbon (≤0.030) and slightly lower Ni (13.0–17.0); similar Mo and Cr; weldability enhanced |
| EU | EN 10088-2 | X2CrNiMo18-15-4 (1.4438) | C ≤0.030, Ni 14.5–16.5, Cr 17.5–19.5, Mo 3.0–4.0; very close in composition; common substitute |
| China | GB/T 3280 | 022Cr19Ni16Mo4 | C ≤0.030, Ni 15.0–17.0, Mo 3.0–4.0; near equivalent but lower C |
| Japan | JIS G4304/G4305 | SUS317L | C ≤0.030, Ni 13.00–17.00, Mo 3.00–4.00; often directly interchangeable in non-critical applications |
| Japan | JIS G4304/G4305 | SUS316L | Lower Mo (2.00–3.00), less resistant to chlorides; cheaper alternative for less demanding environments |
Notes:
SUS317J1 has limited availability compared to standard 317L or 1.4438; consult stockists for specific thickness and width. Post-weld annealing is recommended to restore full corrosion resistance if heavy forming or welding has been performed. For improved weldability, the matching filler metal AWS A5.9 ER317L can be used. The material is non-magnetic in annealed condition but may become slightly magnetic after cold working.
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