JIS G4305 SUS304 Stainless Steel Pipe
JIS G4305 SUS304 Stainless Steel Pipe Material Properties
Comprehensive material data for SUS304 stainless steel pipe per JIS G4305 standard, including chemical composition, mechanical properties, thermal and physical characteristics, international equivalents, and application guide.
Cold rolling, bending, welding, deep drawing, machining (conventional), laser cutting
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JIS G4305 SUS304 Stainless Steel Pipe Introduction
SUS304 is an austenitic chromium-nickel stainless steel grade defined in JIS G4305 (Cold-rolled stainless steel plates, sheets and strip). It offers excellent corrosion resistance, good formability, and superior weldability. Typical applications include pipes and tubes in food processing, chemical equipment, and general engineering. The material is normally supplied in solution annealed condition, providing a balanced combination of strength and ductility.
JIS G4305 SUS304 Stainless Steel Pipe Chemical Composition
The chemical composition of SUS304 according to JIS G4305. The balance is iron (Fe). Residual elements are controlled to maintain austenitic structure and corrosion resistance.
| Chemical Element | Standard Value (wt%) | 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 | |
| Nitrogen (N) | ≤0.10 | usually residual |
| Iron (Fe) | Balance |
JIS G4305 SUS304 Stainless Steel Pipe Thermal and Electrical Physical Properties
Typical physical properties for SUS304 at room temperature unless otherwise stated. Values may vary slightly with processing history and temperature.
| Property | Standard Value | Unit | Test Condition |
|---|---|---|---|
| Density (ρ) | 7.93 | g/cm³ | At 20 °C |
| Elastic Modulus (E) | 193 | GPa | At 20 °C, longitudinal |
| Shear Modulus (G) | 73 | GPa | Calculated from E and ν |
| Poisson's Ratio (ν) | 0.30 | — | At 20 °C |
| Thermal Expansion (α) | 16.0 | 10⁻⁶/K | 20–100 °C |
| Thermal Expansion (α) | 17.2 | 10⁻⁶/K | 20–300 °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 | At 20 °C |
| Electrical Resistivity (ρₑ) | 0.72 | µΩ·m | At 20 °C |
JIS G4305 SUS304 Stainless Steel Pipe Mechanical Properties
Mechanical properties for SUS304 cold-rolled sheet/strip (material that would be formed into pipe) tested at room temperature after solution annealing, per JIS G4305. Values vary with thickness; multiple standard conditions are shown.
| Property | Standard Value | Unit | Test Condition |
|---|---|---|---|
| Yield Strength (ReH) | ≥205 | MPa | Solution annealed, RT, 0.2% offset |
| Tensile Strength (Rm) | ≥520 | MPa | Solution annealed, RT |
| Elongation (A50) | ≥40 | % | Thickness ≤8 mm, gauge length 50 mm |
| Elongation (A50) | ≥40 | % | Thickness >8 mm to 13 mm, gauge length 50 mm |
| Hardness (HBW) | ≤187 | HBW | Solution annealed condition |
| Hardness (HRB) | ≤90 | HRB | Solution annealed condition |
| Hardness (HV) | ≤200 | HV | Solution annealed condition |
JIS G4305 SUS304 Stainless Steel Pipe Complete Equivalent Material Standards and Replaceable Grades
| Country/Region | Standard | Grade | Remarks |
|---|---|---|---|
| Japan | JIS G4305 | SUS304 | Original specification for cold‑rolled plate/strip; also used for pipe base material |
| USA | ASTM A240/A240M | 304 (UNS S30400) | Flat products; identical composition and properties |
| EU | EN 10088-2 | 1.4301 (X5CrNi18-10) | Close match; very slightly different composition tolerances |
| China | GB/T 3280 | 06Cr19Ni10 | Equivalent stainless steel grade |
| International | ISO 15510 | X5CrNi18-10 | Equivalent to 304/1.4301 |
| EU | EN 10216-5 (pipe) | 1.4301 | Seamless stainless steel pipe grade |
| USA | ASTM A312/A312M | TP304 | Welded and seamless pipe; identical composition |
JIS G4305 SUS304 Stainless Steel Pipe Application Introduction
JIS G4305 SUS304 pipe material is widely used where a combination of corrosion resistance, hygiene, and mechanical reliability is required. Typical usage spans from food processing to chemical transport. The material can be fabricated into various components using standard metalworking techniques.
Product Applications: Seamless and welded stainless steel pipes, Heat exchanger tubes, Sanitary tubing for dairy, beverage, and pharmaceutical lines, Pressure vessels and storage tanks, Piping systems for chemical plants, Boiler and superheater tubes (moderate temperature)
Processed into products: Pipe fittings (elbows, tees, reducers, flanges), Valve bodies and stems, Pump casings and impellers, Heat exchanger baffles and tube sheets, Nozzles and vessel connections, Instrumentation tube and connectors, Structural hollow sections
Application industries: Food and Beverage Processing, Chemical and Petrochemical, Pharmaceutical and Biotechnology, Oil and Gas (non‑sour service, moderate temperatures), Power Generation (heat exchanger tubing), Architecture and Construction (decorative piping, handrails), Water Treatment and Desalination, Automotive (exhaust systems, fluid lines)
JIS G4305 SUS304 Stainless Steel Pipe Similar / Alternative Materials Recommendation
| Country/Region | Standard | Grade | Remarks |
|---|---|---|---|
| Japan | JIS G4305 | SUS304L | Lower carbon (≤0.030) for improved weld corrosion resistance |
| USA | ASTM A240/A240M | 304L (UNS S30403) | Extra-low carbon version of 304 |
| EU | EN 10088-2 | 1.4307 (X2CrNi18-9) | Low‑carbon equivalent to 304L, often direct substitute |
| Japan | JIS G4305 | SUS304J1 | Cu‑added variant for deep drawability |
| EU | EN 10088-2 | 1.4311 (X2CrNiN18-10) | Nitrogen‑strengthened, similar corrosion resistance with higher strength |
| China | GB/T 3280 | 022Cr19Ni10 | Equivalent to 304L |
Notes:
Note: JIS G4305 is originally a standard for flat products; for dedicated pipe standards, refer to JIS G3459 or JIS G3463 for stainless steel pipes. The chemical and general property data provided here are from JIS G4305 and represent the base material that can be formed into pipe. Actual pipe mechanical properties may be influenced by cold working during tube manufacturing. Always consult the relevant pipe standard for final product properties. Maximum service temperature in air is approximately 870 °C for intermittent and 925 °C for continuous service. For chloride-containing environments, susceptibility to stress corrosion cracking should be considered.
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