JIS SUS317J2 Austenitic Stainless Steel Plate/Coil
JIS SUS317J2 Austenitic Stainless Steel Plate/Coil: Properties, Equivalents & Applications
Complete technical data for SUS317J2 stainless steel per JIS G4304/G4305, including chemical composition, mechanical and physical properties, international equivalents, and typical applications.
Hot rolling, cold rolling, solution annealing, pickling, welding, forming, machining
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JIS SUS317J2 Austenitic Stainless Steel Plate/Coil Introduction
SUS317J2 is a low-carbon, high-chromium austenitic stainless steel with additions of nickel and molybdenum. Designed for superior resistance to sulfuric acid and other aggressive environments, it offers excellent intergranular corrosion resistance in the as-welded condition due to its low carbon content (≤0.03%). Key attributes include:
- High chromium (23-26%) and nickel (13-16%) content for strong acid resistance
- Molybdenum (0.5-1.2%) enhances pitting and crevice corrosion performance
- Good mechanical strength and ductility, suitable for forming and welding
- Typical supply forms: hot-rolled or cold-rolled plates, coils, and sheets
JIS SUS317J2 Austenitic Stainless Steel Plate/Coil Chemical Composition
Chemical composition as specified in JIS G4304/G4305. All values are in weight percent. The low carbon content ensures resistance to sensitization during welding.
| Element | Content (wt%) | Notes |
|---|---|---|
| Carbon (C) | ≤0.03 | |
| Silicon (Si) | ≤1.00 | |
| Manganese (Mn) | ≤1.50 | |
| Phosphorus (P) | ≤0.045 | |
| Sulfur (S) | ≤0.030 | |
| Nickel (Ni) | 13.00–16.00 | |
| Chromium (Cr) | 23.00–26.00 | |
| Molybdenum (Mo) | 0.50–1.20 |
JIS SUS317J2 Austenitic Stainless Steel Plate/Coil Thermal and Electrical Physical Properties
Typical physical properties of SUS317J2 austenitic stainless steel. These values are not specified in the product standard but are representative for engineering calculations.
| Property | Typical Value | Unit | Temperature / Condition |
|---|---|---|---|
| Density (ρ) | 8.0 | g/cm³ | 20 °C |
| Modulus of Elasticity (E) | 193 | GPa | 20 °C |
| Shear Modulus (G) | 77 | GPa | 20 °C |
| Poisson's Ratio (ν) | 0.30 | — | 20 °C |
| Thermal Expansion Coefficient (α) | 16.0 | 10⁻⁶/K | 20–100 °C |
| Thermal Expansion Coefficient (α) | 16.5 | 10⁻⁶/K | 20–300 °C |
| Thermal Expansion Coefficient (α) | 17.5 | 10⁻⁶/K | 20–500 °C |
| Thermal Conductivity (λ) | 14.0 | W/(m·K) | at 100 °C |
| Thermal Conductivity (λ) | 16.0 | W/(m·K) | at 300 °C |
| Thermal Conductivity (λ) | 19.0 | W/(m·K) | at 500 °C |
| Specific Heat Capacity (cp) | 500 | J/(kg·K) | 20 °C |
| Electrical Resistivity (ρe) | 0.75 | μΩ·m | 20 °C |
JIS SUS317J2 Austenitic Stainless Steel Plate/Coil Mechanical Properties
Minimum mechanical properties per JIS G4304/G4305 for plates, sheets and strips in the solution-annealed condition. Elongation requirements vary with thickness.
| Property | Required Value | Unit | Test Condition |
|---|---|---|---|
| Tensile Strength (Rm) | ≥520 | MPa | All thicknesses, solution annealed |
| Yield Strength (Rp0.2) | ≥205 | MPa | All thicknesses, solution annealed |
| Elongation (A) | ≥35 | % | Thickness ≤3 mm |
| Elongation (A) | ≥40 | % | 3 mm ≤ thickness < 8 mm |
| Elongation (A) | ≥30 | % | Thickness ≥8 mm |
| Bend Test | No cracks, 180° bend, d=2a | — | Thickness ≤13 mm, solution annealed |
JIS SUS317J2 Austenitic Stainless Steel Plate/Coil Fully Equivalent Standards and Replaceable Grades
| Country/Region | Standard | Grade | Notes |
|---|---|---|---|
| USA | ASTM A240/A240M | UNS S31725 | Identical chemical composition and properties |
| International | ISO 15510 | X2CrNiMo25-14-2 | Matches SUS317J2 requirements |
JIS SUS317J2 Austenitic Stainless Steel Plate/Coil Application Introduction
SUS317J2 is optimized for severe acidic environments, particularly those containing sulfuric acid. Its low carbon and balanced alloy design minimize sensitization and ensure long service life in corrosive chemical processes. Typical applications include:
- Storage and transport of concentrated sulfuric acid
- Flue gas desulfurization scrubbers and ducting
- Pulp and paper bleach plants
- Pharmaceutical and food processing equipment
Product Applications: Sulfuric acid storage tanks, Pressure vessels and columns, Heat exchangers and condensers, Process piping and fittings, Ducting and stacks for FGD systems, Reactors and digesters
Processed into products: Flanges and gaskets, Valve bodies and trim, Pump casings and impellers, Fasteners (bolts, nuts), Expansion joints, Internal lining sheets and weld overlays
Application industries: Chemical Processing, Petrochemical, Flue Gas Desulfurization (FGD), Pulp & Paper, Pharmaceutical, Food Processing
JIS SUS317J2 Austenitic Stainless Steel Plate/Coil Similar Alternative Materials and Near-Equivalents
| Country/Region | Standard | Grade | Notes |
|---|---|---|---|
| Japan | JIS G4304/G4305 | SUS317J1 | Higher carbon content (≤0.08%), otherwise same composition; lower weld corrosion resistance |
| USA | ASTM A240/A240M | UNS S31700 | Different composition (Cr 18-20, Ni 11-15, Mo 3-4); only similar in being an austenitic stainless steel, not a direct substitute |
Notes:
Welding: Use low-carbon filler metals such as ER317L or ER385 to maintain corrosion resistance. Generally, post-weld heat treatment is not required, but stress relieving may be applied when risk of chloride stress corrosion cracking exists. Formability: Good cold formability, but higher strength than standard 304/316 requires appropriate force. Machinability: Similar to other austenitic stainless steels; work hardening tendency should be managed with sharp tools and adequate cooling.
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