1.4301 Austenitic Stainless Steel Pipe per DIN 17400
1.4301 Austenitic Stainless Steel Pipe per DIN 17400: Composition, Properties, and Equivalents
Comprehensive material data for 1.4301 (X5CrNi18-10) stainless steel pipe under DIN 17400, including chemical composition, mechanical and thermal properties, international equivalents, and application guide.
Welding, cold drawing, bending, forming, machining (with appropriate tooling), solution annealing
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1.4301 Austenitic Stainless Steel Pipe per DIN 17400 Introduction
1.4301 (X5CrNi18-10) stainless steel pipe according to DIN 17400 is an austenitic chromium-nickel stainless steel with excellent corrosion resistance, good formability, and weldability. Its typical composition of 18% Cr and 10% Ni provides a stable austenitic structure at ambient temperature. This grade is widely used in food processing, chemical equipment, and architectural applications. It is non-magnetic in the annealed condition and can be easily cold-worked to increase strength. The pipe is typically supplied in solution-annealed and pickled condition.
1.4301 Austenitic Stainless Steel Pipe per DIN 17400 Chemical Composition
The chemical composition conforms to DIN 17400 for grade 1.4301. Values are maximum unless a range is specified. Alloying elements such as chromium and nickel provide corrosion resistance and austenitic structure. Note: Other elements may be present as residual impurities.
| Element | Standard Value | Remarks |
|---|---|---|
| C | ≤0.07 | |
| Si | ≤1.00 | |
| Mn | ≤2.00 | |
| P | ≤0.045 | |
| S | ≤0.030 | |
| Cr | 17.5 - 19.5 | |
| Ni | 8.0 - 10.5 | |
| N | ≤0.11 | |
| Fe | Balance |
1.4301 Austenitic Stainless Steel Pipe per DIN 17400 Thermal and Electrical Physical Properties
Physical properties of 1.4301 stainless steel at room temperature and at elevated temperatures. Data are typical and can slightly vary due to processing history.
| Property | Typical Value | Unit | Test Condition |
|---|---|---|---|
| Density (ρ) | 7.9 | g/cm³ | At 20 °C |
| Modulus of Elasticity (E) | 200 | GPa | At 20 °C |
| Shear Modulus (G) | 77 | GPa | At 20 °C |
| Poisson's Ratio (ν) | 0.30 | – | At 20 °C |
| Thermal Expansion (α) | 16.5 | 10⁻⁶ K⁻¹ | 20–100 °C |
| Thermal Expansion (α) | 17.5 | 10⁻⁶ K⁻¹ | 20–300 °C |
| Thermal Expansion (α) | 18.0 | 10⁻⁶ K⁻¹ | 20–500 °C |
| Thermal Conductivity (λ) | 15 | W/(m·K) | At 20 °C |
| Thermal Conductivity (λ) | 21 | W/(m·K) | At 500 °C |
| Specific Heat Capacity | 500 | J/(kg·K) | At 20 °C |
| Electrical Resistivity (ρ_e) | 0.73 | μΩ·m | At 20 °C |
1.4301 Austenitic Stainless Steel Pipe per DIN 17400 Mechanical Properties
The mechanical properties are given for solution-annealed condition (1000–1100 °C water quench). Values are minimum unless ranges are indicated. Properties vary with wall thickness; typical data for pipe products are presented.
| Property | Required Value | Unit | Test Condition |
|---|---|---|---|
| Yield Strength (Rp0.2) | ≥190 | MPa | Transverse direction at room temperature |
| Tensile Strength (Rm) | 500 - 700 | MPa | Transverse direction |
| Elongation (A) | ≥45 | % | Gauge length 5.65√S (wall thickness >3 mm); for thickness ≤3 mm: ≥40% (transverse) |
| Impact Energy (KV) | ≥100 | J | At 20 °C (typical, not mandatory for pipe) |
| Hardness (Brinell) | ≤215 | HBW | Annealed condition |
1.4301 Austenitic Stainless Steel Pipe per DIN 17400 Completely Equivalent Material Standards & Grade Replacements
| Country/Region | Standard | Grade | Remarks |
|---|---|---|---|
| Germany/Europe | EN 10088-2/-3 | 1.4301 (X5CrNi18-10) | Identical composition and mechanical properties |
| USA | ASTM A276/A312 | 304 (UNS S30400) | Minor variations in sulfur content |
| Japan | JIS G4303/G3459 | SUS304 | Direct equivalent |
| China | GB/T 20878 | 06Cr19Ni10 | Equivalent new GB grade |
| International | ISO 15510 | X5CrNi18-10 | Same designation |
1.4301 Austenitic Stainless Steel Pipe per DIN 17400 Application Introduction
1.4301 pipes are ideal for applications requiring good corrosion resistance in mildly corrosive environments. They are not suitable for seawater or strong reducing acids.
- Excellent formability and deep drawing capability.
- Good weldability by all standard methods except oxyacetylene.
- Can be used from cryogenic to moderately elevated temperatures (up to ~300°C continuously, 800°C for intermittent service).
- Not hardenable by heat treatment; work hardening can increase strength.
Product Applications: Stainless steel pipes and tubes for process lines, Heat exchanger tubes, Sanitary tubing, Structural hollow sections, Exhaust systems, Brewing and dairy equipment, Kitchen sinks and equipment
Processed into products: Pipe fittings (elbows, tees, flanges), Tubular heat exchanger bundles, Condenser pipes, Handrails and balustrades, Piping systems in food plants, Fermentation tanks and vessels (using welded pipe), Instrumentation tubes
Application industries: Food and Beverage, Pharmaceutical, Chemical Processing, Architecture and Construction, Heat Exchangers, Sanitary Ware, Water Treatment
1.4301 Austenitic Stainless Steel Pipe per DIN 17400 Similar / Alternative Grades Recommendation
| Country/Region | Standard | Grade | Remarks |
|---|---|---|---|
| Germany/Europe | EN 10088-2/-3 | 1.4307 (X2CrNi18-9) / 304L | Lower carbon for improved weldability and intergranular corrosion resistance |
| Germany/Europe | EN 10088-2/-3 | 1.4306 (X2CrNi19-11) / 304L | Low-carbon variant, similar corrosion resistance |
| USA | ASTM A276/A312 | 304L (UNS S30403) | Low-carbon alternative |
| Europe | EN 10088-3 | 1.4305 (X8CrNiS18-9) / 303 | Sulfur added for improved machinability, reduced corrosion resistance |
| Germany/Europe | EN 10088-2/-3 | 1.4401 (X5CrNiMo17-12-2) / 316 | Molybdenum addition for better pitting resistance in chloride environments |
Notes:
For specific pipe dimensions and tolerances, refer to product standards such as EN 10216-5 (seamless) or EN 10217-7 (welded). This material is often certified as 1.4301 by EN 10204 Type 3.1. The material may become slightly magnetic after cold working.
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