SUS316J1 Austenitic Stainless Steel Plate/Coil per JIS G4304 & G4305
SUS316J1 Austenitic Stainless Steel Plate/Coil per JIS G4304 & G4305 - Composition, Properties & Equivalents
Detailed technical data for SUS316J1, a copper-enhanced austenitic stainless steel for plate and coil, covering chemistry, mechanical, thermal and electrical properties.
Hot rolling, cold rolling, deep drawing, bending, welding, machining
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SUS316J1 Austenitic Stainless Steel Plate/Coil per JIS G4304 & G4305 Introduction
SUS316J1 is an austenitic stainless steel alloyed with copper, offering improved corrosion resistance in reducing acids (e.g., sulfuric acid) and enhanced deep drawability compared to standard SUS316. Main features:
- Excellent corrosion resistance in moderate reducing environments and organic acids
- Superior cold formability due to copper addition
- Non-magnetic in solution-annealed condition
- Good weldability by conventional processes
Commonly supplied as plate, sheet and coil under JIS G4304 (hot-rolled) and JIS G4305 (cold-rolled).
SUS316J1 Austenitic Stainless Steel Plate/Coil per JIS G4304 & G4305 Chemical Composition
Chemical composition according to JIS G4304/G4305 standards. Copper is the key alloying addition to improve formability and corrosion resistance in reducing media.
- C: limited to preserve corrosion resistance
- Cr-Ni-Mo: provide pitting and crevice corrosion resistance
- Cu: enhances resistance to sulfuric acid and improves cold heading
| Element | Content (%) | Remarks |
|---|---|---|
| C | ≤ 0.08 | Standard limit |
| Si | ≤ 1.00 | |
| Mn | ≤ 2.00 | |
| P | ≤ 0.045 | |
| S | ≤ 0.030 | |
| Ni | 10.00 – 14.00 | |
| Cr | 17.00 – 19.00 | |
| Mo | 1.20 – 2.75 | |
| Cu | 1.00 – 2.50 | Key element for sulfuric acid resistance |
SUS316J1 Austenitic Stainless Steel Plate/Coil per JIS G4304 & G4305 Thermal and Electrical Physical Properties
Physical properties at various temperatures in solution-annealed condition. Values are typical for Cu-modified 17Cr-11Ni-2Mo alloys.
- Density slightly increases with copper content
- Thermal expansion similar to standard austenitic grades
- Thermal conductivity is relatively low, enhancing heat retention in process applications
| Property | Typical Value | Unit | Temperature / Condition |
|---|---|---|---|
| Density (ρ) | 8.0 | g/cm³ | 20 °C |
| Elastic modulus (E) | 193 | GPa | 20 °C |
| Shear modulus (G) | 77 | GPa | 20 °C (calculated) |
| 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 | 20–200 °C |
| Thermal expansion coefficient (α) | 17.0 | 10⁻⁶/K | 20–300 °C |
| Thermal expansion coefficient (α) | 17.5 | 10⁻⁶/K | 20–400 °C |
| Thermal conductivity (λ) | 14.0 | W/(m·K) | 20 °C |
| Thermal conductivity (λ) | 15.0 | W/(m·K) | 100 °C |
| Thermal conductivity (λ) | 16.0 | W/(m·K) | 200 °C |
| Thermal conductivity (λ) | 17.0 | W/(m·K) | 300 °C |
| Specific heat capacity (c) | 500 | J/(kg·K) | 20 °C |
| Electrical resistivity (ρₑ) | 0.75 | µΩ·m | 20 °C |
SUS316J1 Austenitic Stainless Steel Plate/Coil per JIS G4304 & G4305 Mechanical Properties
Minimum mechanical properties at room temperature for solution-annealed condition as per JIS G4304/G4305. Actual values may be higher depending on thickness and rolling process.
- Tensile properties are specified for standard thickness ranges
- Hardness is controlled to ensure ductility
- No impact test requirement for austenitic grades in plate standards; values are for reference
| Property | Minimum Value | Unit | Test Condition |
|---|---|---|---|
| Tensile strength (Rm) | 520 | MPa | Room temperature, solution annealed |
| Yield strength (Rp0.2) | 205 | MPa | Room temperature, solution annealed |
| Elongation (A50) for thickness ≤ 3 mm | 40 | % | Gauge length 50 mm |
| Elongation (A50) for thickness 3 < t ≤ 8 mm | 40 | % | Gauge length 50 mm |
| Hardness | ≤ 90 | HRB | Solution annealed, typical |
| Hardness | ≤ 187 | HBW | Alternative |
SUS316J1 Austenitic Stainless Steel Plate/Coil per JIS G4304 & G4305 Equivalent Materials by Global Standards
| Country/Region | Standard | Grade | Remarks |
|---|---|---|---|
| Europe | EN 10088-2 / EN 10088-3 | X3CrNiCuMo17-11-3-2 (1.4578) | Identical chemical composition |
| China | GB/T 20878 / GB/T 3280 | 06Cr17Ni12Mo2Cu2 (S31688) | Equivalent Chinese designation |
| International | ISO 15510 | X3CrNiCuMo17-11-3-2 | ISO harmonized grade |
| USA (UNS) | ASTM A240 (non-standard) | UNS S31625 (informal) | Similar chemistry, not directly listed in ASTM |
SUS316J1 Austenitic Stainless Steel Plate/Coil per JIS G4304 & G4305 Application Introduction
SUS316J1 is primarily used where enhanced resistance to sulfuric acid and good deep drawability are required. It is often chosen for complex-shaped components that are difficult to fabricate with standard 316.
- Typical industries: chemical processing, food & beverage, pharmaceutical, automotive
- Common products: deep-drawn sinks and containers, heat exchanger plates, fasteners for aggressive environments
Product Applications: Deep-drawn kitchen sinks and countertops, Heat exchanger plates and shells, Fasteners (bolts, nuts, screws) for corrosive service, Chemical storage tanks and mixing vessels, Flexible metal hoses and bellows
Processed into products: Dished heads and flanges, Valve bodies and internals, Pump casings and impellers, Automotive fuel system components, Cold-headed rivets and pins
Application industries: Chemical & petrochemical processing, Food and beverage equipment, Pharmaceutical production, Automotive exhaust components, Appliance manufacturing
SUS316J1 Austenitic Stainless Steel Plate/Coil per JIS G4304 & G4305 Similar Materials for Cross Reference
| Country/Region | Standard | Grade | Remarks |
|---|---|---|---|
| Japan | JIS G4304/G4305 | SUS316 | Standard 316 without Cu; less formability |
| Japan | JIS G4304/G4305 | SUS316L | Low-carbon 316 without Cu; better weldability |
| Europe | EN 10088-2 | X5CrNiMo17-12-2 (1.4401) | Standard 316 equivalent, no Cu addition |
| USA | ASTM A240 | UNS S31600 (Type 316) | Standard 316, similar corrosion base but lower formability |
| China | GB/T 3280 | 06Cr17Ni12Mo2 (S31608) | Chinese 316 without Cu |
Notes:
Heat treatment: Solution anneal at 1010–1150 °C followed by rapid cooling (water or air). Avoid slow cooling between 500–900 °C to prevent sigma phase and chromium carbide precipitation.
Welding: Can be welded by TIG, MIG, and resistance methods. Post-weld annealing is not always necessary but may be applied to restore optimal corrosion resistance.
Forming: Excellent cold formability; copper reduces work hardening rate compared to SUS316. Deep drawing limits are improved by approximately 10–15%.
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