GB/T 4237 06Cr19Ni10 (S30408) Austenitic Stainless Steel Plate/Coil
06Cr19Ni10 (S30408) - Austenitic Stainless Steel Plate/Coil per GB/T 4237
Comprehensive material data for 06Cr19Ni10 (formerly 0Cr18Ni9) austenitic stainless steel according to GB/T 4237, including chemical composition, mechanical and physical properties, international equivalents, and typical applications.
Hot rolling, cold rolling, solution annealing, pickling, bending, deep drawing, welding, machining (with suitable tools)
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GB/T 4237 06Cr19Ni10 Austenitic Stainless Steel Plate/Coil Introduction
06Cr19Ni10, designated by unified number S30408, is a widely used austenitic stainless steel corresponding to the classic 304 grade. It offers excellent corrosion resistance in a variety of environments, good formability and weldability, and non-magnetic properties in the annealed condition. The material is typically supplied as hot-rolled plate, sheet or coil in solution-annealed and pickled condition. Its balanced chromium (18–20%) and nickel (8–11%) content provides a stable austenitic structure, making it suitable for applications ranging from food processing and architectural trim to chemical equipment and nuclear plant components.
GB/T 4237 06Cr19Ni10 Austenitic Stainless Steel Plate/Coil Chemical Composition
The composition conforms to GB/T 4237-2015 and the steel designation S30408 per GB/T 20878. All values are ladle analysis. Elements not listed are present as residuals and controlled to avoid detrimental effects on properties.
| Element | Specified Value (%) | Remarks |
|---|---|---|
| C | ≤ 0.08 | |
| Si | ≤ 1.00 | |
| Mn | ≤ 2.00 | |
| P | ≤ 0.045 | |
| S | ≤ 0.030 | |
| Cr | 18.00 – 20.00 | |
| Ni | 8.00 – 11.00 | |
| N | usually ≤ 0.10 (not specified) | Incidental element; may be present |
GB/T 4237 06Cr19Ni10 Austenitic Stainless Steel Plate/Coil Thermal and Electrical Physical Properties
Typical physical properties for 06Cr19Ni10 (304 type) at room temperature and elevated temperatures. These values are not mandatory in GB/T 4237 but are useful for design purposes. Variations may occur due to exact processing conditions.
| Property | Typical Value | Unit | Test Condition / Temperature |
|---|---|---|---|
| Density (ρ) | 7.93 | g/cm³ | 20°C |
| Elastic Modulus (E) | 193 | GPa | 20°C |
| Elastic Modulus (E) | 172 | GPa | 400°C |
| Shear Modulus (G) | 77 | GPa | 20°C (calculated) |
| Poisson's Ratio (ν) | 0.30 | 20°C | |
| Thermal Expansion Coefficient (α) – mean between 20°C and T | 16.0 | 10⁻⁶/K | 20–100°C |
| Thermal Expansion Coefficient (α) – mean between 20°C and T | 17.2 | 10⁻⁶/K | 20–300°C |
| Thermal Expansion Coefficient (α) – mean between 20°C and T | 18.4 | 10⁻⁶/K | 20–500°C |
| Thermal Conductivity (λ) | 16.3 | W/(m·K) | 100°C |
| Thermal Conductivity (λ) | 21.5 | W/(m·K) | 500°C |
| Specific Heat Capacity | 500 | J/(kg·K) | 20°C |
| Electrical Resistivity (ρ_e) | 0.73 | µΩ·m | 20°C |
GB/T 4237 06Cr19Ni10 Austenitic Stainless Steel Plate/Coil Mechanical Properties
Mechanical property requirements according to GB/T 4237-2015 for hot-rolled plate/coil in solution-annealed condition. Testing at room temperature. For elongation, transverse specimen values are given. Hardness values are for reference; they are not mandatory but included in the standard.
| Property | Required Value | Unit | Test Condition |
|---|---|---|---|
| 0.2% Proof Strength (Rp0.2) | ≥ 205 | MPa | Solution annealed, room temperature |
| Tensile Strength (Rm) | ≥ 515 | MPa | Solution annealed, room temperature |
| Elongation (A) – transverse, thickness ≤ 3 mm | ≥ 40 | % | Gauge length 50 mm or proportional |
| Elongation (A) – transverse, thickness > 3 mm | ≥ 40 | % | Gauge length 50 mm or proportional |
| Bend test – thickness ≤ 12.7 mm | 180°, d = a | Bend test, no cracks | |
| Bend test – thickness > 12.7 mm | 180°, d = 2a | Bend test, no cracks | |
| Hardness – Brinell (HBW) | ≤ 201 | HBW | For reference |
| Hardness – Rockwell B (HRB) | ≤ 92 | HRB | For reference |
| Hardness – Vickers (HV) | ≤ 210 | HV | For reference |
GB/T 4237 06Cr19Ni10 Austenitic Stainless Steel Plate/Coil Fully Equivalent Material Standards and Replaceable Grades
| Country/Region | Standard | Grade | Remarks |
|---|---|---|---|
| China | GB/T 4237, GB/T 20878 | 06Cr19Ni10 (S30408) | Original grade 0Cr18Ni9; identical composition and properties |
| USA | ASTM A240/A240M | 304 (UNS S30400) | Widely used; carbon max 0.08%, similar tensile/elongation |
| Japan | JIS G4304 / G4305 | SUS304 | SUS304 is the basic 18Cr-8Ni austenitic stainless steel |
| European Union | EN 10088-2 | 1.4301 (X5CrNi18-10) | C ≤ 0.07% slightly lower, otherwise fully interchangeable for most uses |
| International | ISO 15510 | X5CrNi18-10 | Equivalent to EN 1.4301, broadly matching 304 |
| South Korea | KS D 3698 / D 3705 | STS304 | Same as SUS304 in practice |
GB/T 4237 06Cr19Ni10 Austenitic Stainless Steel Plate/Coil Application Introduction
06Cr19Ni10 is a versatile austenitic stainless steel. Its balance of strength, ductility and corrosion resistance makes it suitable for a wide range of industries. It is typically used in mildly corrosive environments and applications where good formability and weldability are required. Key advantages:
- Excellent corrosion resistance in atmospheric, aqueous and many chemical media
- Non-magnetic in the solution-annealed condition
- Good deep drawing and stretch forming ability
- Outstanding toughness even at cryogenic temperatures
- Easily welded by common methods (TIG, MIG, resistance welding)
Product Applications: Storage tanks, pressure vessels, reactors, Piping systems, fittings, valves, Architectural panels, elevator cabins, handrails, Commercial kitchen equipment (sinks, work tables), Surgical instruments, implants, hospital furniture, Automotive trim, exhaust components, Brewery kettles, dairy processing lines, Nuclear fuel racks, spent fuel storage
Processed into products: Deep-drawn sinks and bowls, Welded tubes and pipes, Heat exchanger plates and shells, Expansion bellows, Fasteners (bolts, nuts) and springs (cold-worked), Flanges, gaskets, sealing rings, Structural sections – angles, channels, beams, Cabinet housings for electronic equipment
Application industries: Food & Beverage Processing, Chemical & Petrochemical Equipment, Architecture & Construction, Medical & Pharmaceutical Devices, Automotive & Transportation, Household Appliances & Kitchenware, Nuclear Power Generation, Heat Exchanger Manufacturing
GB/T 4237 06Cr19Ni10 Austenitic Stainless Steel Plate/Coil Closely Related or Alternative Material Grades
| Country/Region | Standard | Grade | Remarks |
|---|---|---|---|
| China | GB/T 4237 | 022Cr19Ni10 (S30403) | 304L – extra-low carbon (≤0.03%) for improved weld decay resistance |
| China | GB/T 4237 | 06Cr18Ni11Ti (S32168) | 321 – stabilized with Ti; used at elevated temperatures |
| USA | ASTM A240 | 304L (S30403) | Low-carbon variant, excellent as-welded corrosion resistance |
| EU | EN 10088-2 | 1.4306 or 1.4307 (X2CrNi19-11) | 304L type; C ≤ 0.03%, a direct substitute when welding without PWHT |
| EU | EN 10088-2 | 1.4541 (X6CrNiTi18-10) | 321 equivalent, stabilized with Ti for high-temperature service |
Notes:
Processing advice: Solution annealing at 1010–1150°C followed by rapid cooling is essential for optimum corrosion resistance. Avoid exposure to 450–850°C to prevent sensitization. Surface finish: Available as pickled (No.1), skin-passed, bright annealed, polished (No.4, BA, etc.) for plate and coil. Welding: Fillers like ER308/ER308L are recommended. For severe corrosion services, post-weld heat treatment or use of the low-carbon variant (304L) is advised. Machinability: Work hardening tendency requires rigid setups, sharp tools and positive feed rates.
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