JIS G3459 SUS304 TP Stainless Steel Pipe
JIS G3459 SUS304 TP Stainless Steel Pipe – Complete Material Data and Global Equivalents
In-depth material analysis of SUS304 TP stainless steel pipe per JIS G3459: chemical composition, mechanical and physical properties, international equivalent grades, and application guidance for engineers and specifiers.
Welding, cold bending, hot bending, flaring, flanging, machining, cutting, threading
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JIS G3459 SUS304 TP Stainless Steel Pipe Introduction
SUS304 TP is an austenitic stainless steel pipe grade specified in JIS G3459, designed for general corrosion-resistant service. It corresponds to the widely used 18Cr-8Ni (304) family and offers an excellent combination of strength, ductility, and fabrication properties. Key attributes:
- Good resistance to a wide range of atmospheric, chemical, and food-processing environments.
- Non-magnetic in the annealed condition; slightly magnetic after cold working.
- Excellent weldability by all common fusion and resistance processes.
- Readily formed, bent, and machined with proper tooling.
- Supplied in the solution-annealed condition, free from harmful carbide precipitation.
The material finds extensive use in piping systems for chemical plants, food and beverage processing, pharmaceuticals, architecture, and water treatment.
JIS G3459 SUS304 TP Stainless Steel Pipe Chemical Composition
Chemical requirements as per the SUS304 grade underlying JIS G3459 pipe. Values are taken from JIS G4304/G4305 (the base standard for SUS304). All values are maximum unless a range is shown.
- The limits guarantee stable austenitic structure and corrosion resistance.
- Low carbon content reduces the risk of intergranular corrosion after welding.
| Chemical Element | Specification (mass %) | Remarks |
|---|---|---|
| Carbon (C) | ≤0.08 | |
| Silicon (Si) | ≤1.00 | |
| Manganese (Mn) | ≤2.00 | |
| Phosphorus (P) | ≤0.045 | |
| Sulfur (S) | ≤0.030 | |
| Nickel (Ni) | 8.00 – 10.50 | |
| Chromium (Cr) | 18.00 – 20.00 | |
| Iron (Fe) | Balance |
JIS G3459 SUS304 TP Stainless Steel Pipe Thermal and Electrical Physical Properties
Physical properties for SUS304 (304) stainless steel in the annealed condition. These values are not part of the JIS G3459 specification but are well-established engineering references. Note:
- Properties are influenced by temperature and slight variations due to product form may occur.
- Density, elastic modulus, and thermal expansion are essential for piping system design.
| Property | Typical Value | Unit | Condition / Temperature |
|---|---|---|---|
| Density (ρ) | 7.93 | g/cm³ | At 20°C |
| Elastic Modulus (E) | 193 | GPa | At 20°C |
| Shear Modulus (G) | 74 | GPa | At 20°C |
| Poisson's Ratio (ν) | 0.30 | – | At 20°C |
| Thermal Expansion Coefficient (α) | 17.3 | 10⁻⁶/K | 0–100°C |
| Thermal Expansion Coefficient (α) | 17.8 | 10⁻⁶/K | 0–315°C |
| Thermal Expansion Coefficient (α) | 18.4 | 10⁻⁶/K | 0–538°C |
| Thermal Conductivity (λ) | 16.2 | W/(m·K) | At 100°C |
| Thermal Conductivity (λ) | 21.5 | W/(m·K) | At 500°C |
| Specific Heat Capacity (c) | 500 | J/(kg·K) | 0–100°C |
| Electrical Resistivity (ρe) | 0.72 | µΩ·m | At 20°C |
JIS G3459 SUS304 TP Stainless Steel Pipe Mechanical Properties
Tensile properties at room temperature measured on a longitudinal test piece taken from the pipe wall. Test conditions:
- Specimen orientation: longitudinal (strip or full-section for small diameters).
- Gauge length for elongation: 50 mm (JIS Z2241).
- Elongation thresholds vary with wall thickness (t).
Values represent minimum requirements; actual material often exceeds these figures.
| Property | Requirement | Unit | Test Condition |
|---|---|---|---|
| Tensile Strength (Rm) | ≥520 | MPa | Room temperature |
| Yield Strength (0.2% offset, Rp0.2) | ≥205 | MPa | Room temperature |
| Elongation (A) | ≥35 | % | Wall thickness ≤8 mm, G.L. 50 mm |
| Elongation (A) | ≥30 | % | Wall thickness 8–20 mm, G.L. 50 mm |
| Elongation (A) | ≥25 | % | Wall thickness >20 mm, G.L. 50 mm |
JIS G3459 SUS304 TP Stainless Steel Pipe Fully Equivalent International Standards and Replaceable Grades
| Country/Region | Standard | Grade | Remarks |
|---|---|---|---|
| United States | ASTM A312 / ASME SA312 | TP304 | Seamless and welded pipe for corrosive service; same nominal composition. |
| European Union | EN 10217-7 | 1.4301 (X5CrNi18-10) | Welded tube for pressure purposes; fully interchangeable with SUS304 TP. |
| China | GB/T 14976 | 06Cr19Ni10 (S30408) | Seamless stainless steel pipe for fluid transport; composition and properties match. |
| International (ISO) | ISO 2604-2 | TS47 | Steel products for pressure purposes; corresponds to 304 type. |
| South Korea | KS D 3576 | STS304 TP | Korean standard pipe grade identical to SUS304 TP. |
JIS G3459 SUS304 TP Stainless Steel Pipe Application Introduction
SUS304 TP pipe is a versatile material suited to a wide range of industries requiring corrosion resistance, good cleanability, and reliable mechanical properties. Its austenitic structure provides excellent toughness even at cryogenic temperatures, and it withstands many organic and inorganic chemicals, foods, and sterilizing solutions. The material is also 100% recyclable. Typical applications are:
Product Applications: Process piping systems for acids, alkalis, and solvents, Heat exchanger tubes and shells, Sanitary tubing for breweries, dairies, and pharmaceuticals, Instrumentation and hydraulic tubing, Structural hollow sections in corrosive atmospheres, Water distribution and fire suppression piping, Steam tracing lines (below 550°C), Exhaust stacks and flue gas ducts
Processed into products: Straight pipe spools and nipples, Seamless and welded elbows (45°, 90°, 180°), Concentric and eccentric reducers, Equal and reducing tees, Lap joint, slip-on, and weld neck flanges, Stub ends and pipe caps, Valve bodies, discs, and stems (for general corrosion service), Expansion bellows and flexible joints, Tube inserts and ferrules, Nozzles and couplings for pressure vessels
Application industries: Chemical Processing, Petrochemical and Refining, Food and Beverage Production, Pharmaceutical Manufacturing, Water Purification and Desalination, Architectural and Structural, Oil & Gas (upstream and midstream), Power Generation (including nuclear), Marine (topsides and non-immersion parts), Pulp and Paper
JIS G3459 SUS304 TP Stainless Steel Pipe Alternative Materials with Similar Performance
| Country/Region | Standard | Grade | Remarks |
|---|---|---|---|
| Japan | JIS G3459 | SUS304L TP | Low-carbon (≤0.030% C) variant; better intergranular corrosion resistance after welding; slightly lower strength. |
| Japan | JIS G3459 | SUS304H TP | Higher carbon (0.04–0.10% C) for improved elevated-temperature strength; suitable for heat exchanger tubes. |
| Japan | JIS G3459 | SUS321 TP | Titanium-stabilized 18Cr-8Ni; immune to sensitization during welding; excellent for high-temperature oxidation service. |
| Japan | JIS G3459 | SUS316 TP | Molybdenum-containing (2–3% Mo) for enhanced pitting/crevice corrosion resistance in chlorides; commonly substituted in marine or chemical environments. |
Notes:
Corrosion resistance: Excellent in rural, urban, and mild industrial atmospheres. Resistant to many organic chemicals and oxidizing acids (e.g., nitric acid below 50% concentration). Susceptible to pitting and crevice corrosion in stagnant chloride environments (e.g., seawater). Stress corrosion cracking may occur in warm (>60°C) chloride solutions. Weldability: Readily welded by TIG, MIG, and plasma processes. For maximum corrosion resistance in severe environments, post-weld solution annealing is recommended. Machining: Work hardens rapidly; use rigid setups, positive feed, and sufficient coolant. Heat treatment: Cannot be hardened by heat treatment; annealing range 1010–1120°C followed by rapid quench. For elevated-temperature applications, refer to the creep and stress rupture data of 304H or 321 if temperatures exceed 500°C continuously. Codes and approvals: Often approved for ASME B31.3 and B31.1 process piping, pressure vessel codes (ASME BPVC Section VIII Div.1), and food-contact regulations (FDA, EU 1935/2004).
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