06Cr19Ni10NbN (0Cr19Ni10NbN) Austenitic Stainless Steel Plate/Coil
06Cr19Ni10NbN (0Cr19Ni10NbN) Austenitic Stainless Steel Plate/Coil | GB/T 4237
Comprehensive material data for 06Cr19Ni10NbN (old designation 0Cr19Ni10NbN) austenitic stainless steel plate and coil per GB/T 4237, including chemical composition, mechanical properties, physical properties, and equivalent grades.
Hot rolling, cold rolling, welding, bending, deep drawing, machining
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06Cr19Ni10NbN Austenitic Stainless Steel Plate/Coil Introduction
06Cr19Ni10NbN (formerly designated 0Cr19Ni10NbN) is an austenitic stainless steel standardized under GB/T 4237 for hot-rolled plates, sheets, and coils. It is microalloyed with both niobium (Nb) and nitrogen (N), combining stabilizing and strengthening effects. Niobium effectively prevents intergranular corrosion, particularly in the heat-affected zone after welding, by forming stable NbC carbides. Nitrogen increases the yield and tensile strength without significantly compromising ductility or corrosion resistance. The material exhibits excellent weldability, good formability, and high toughness at cryogenic temperatures. Typical applications include chemical processing equipment, pressure vessels, and components requiring high strength and resistance to sensitization. The standard delivery condition is solution annealed and descaled, with mechanical properties verified at room temperature.
06Cr19Ni10NbN Austenitic Stainless Steel Plate/Coil Chemical Composition
Chemical composition specified in GB/T 4237 for grade 06Cr19Ni10NbN. The niobium content is linked to carbon to ensure full stabilization (Nb ≥10×%C) up to a maximum of 1.10%. Nitrogen is added for strengthening. All values are weight percent.
| Element | Standard Value | Notes |
|---|---|---|
| Carbon (C) | ≤0.08 | |
| Silicon (Si) | ≤1.00 | |
| Manganese (Mn) | ≤2.00 | |
| Phosphorus (P) | ≤0.045 | |
| Sulfur (S) | ≤0.030 | |
| Chromium (Cr) | 18.00 - 20.00 | |
| Nickel (Ni) | 8.00 - 11.00 | |
| Niobium (Nb) | 10×%C - 1.10 | Stabilizing element, minimum 10 times carbon content |
| Nitrogen (N) | 0.15 - 0.30 | Strength enhancement |
| Iron (Fe) | Balance | Remaining element |
06Cr19Ni10NbN Austenitic Stainless Steel Plate/Coil Physical Properties
Typical physical properties for 06Cr19Ni10NbN austenitic stainless steel. These values are representative of the Nb+N stabilized grade at room temperature and elevated temperatures, based on common industry references and comparable to standard 304-type stainless steels.
| Property | Typical Value | Unit | Test Condition / Temperature |
|---|---|---|---|
| Density (ρ) | 7.93 | g/cm³ | At 20°C |
| Elastic Modulus (E) | 193 | GPa | At 20°C |
| Shear Modulus (G) | 78 | GPa | At 20°C |
| Poisson's Ratio (ν) | 0.30 | - | At 20°C |
| Thermal Expansion Coefficient (α) | 16.0 | 10⁻⁶/K | 20°C to 100°C |
| Thermal Expansion Coefficient (α) | 16.5 | 10⁻⁶/K | 20°C to 200°C |
| Thermal Expansion Coefficient (α) | 17.0 | 10⁻⁶/K | 20°C to 300°C |
| Thermal Expansion Coefficient (α) | 17.5 | 10⁻⁶/K | 20°C to 400°C |
| Thermal Conductivity (λ) | 15.0 | W/(m·K) | At 20°C |
| Thermal Conductivity (λ) | 16.2 | W/(m·K) | At 100°C |
| Thermal Conductivity (λ) | 18.0 | W/(m·K) | At 200°C |
| Thermal Conductivity (λ) | 19.5 | W/(m·K) | At 300°C |
| Specific Heat Capacity | 500 | J/(kg·K) | At 20°C |
| Electrical Resistivity (ρ_e) | 0.75 | μΩ·m | At 20°C |
06Cr19Ni10NbN Austenitic Stainless Steel Plate/Coil Mechanical Properties
Minimum mechanical properties for 06Cr19Ni10NbN plates and coils in solution annealed condition as per GB/T 4237. Properties are guaranteed for longitudinal and transverse directions for thicknesses up to 60 mm. Hardness values are maximum limits. Bending test mandates no cracks after 180° bending.
| Property | Standard Required Value | Unit | Test Condition |
|---|---|---|---|
| Yield Strength (Rp0.2) | ≥275 | MPa | Plate thickness ≤60 mm, room temperature |
| Tensile Strength (Rm) | ≥550 | MPa | Plate thickness ≤60 mm, room temperature |
| Elongation (A) | ≥35 | % | Plate thickness ≤3 mm, gauge length 50 mm |
| Elongation (A) | ≥40 | % | Plate thickness >3 mm to 60 mm, gauge length 50 mm |
| Hardness (HBW) | ≤217 | HB | As delivered, solution annealed |
| Hardness (HRB) | ≤95 | HRB | As delivered, solution annealed |
| Hardness (HV) | ≤220 | HV | As delivered, solution annealed |
| Bending Test | 180° d=2a (no cracks) | - | Thickness ≤6 mm, bending mandrel diameter=2×plate thickness |
| Bending Test | 180° d=3a (no cracks) | - | Thickness >6 mm, bending mandrel diameter=3×plate thickness |
06Cr19Ni10NbN Austenitic Stainless Steel Plate/Coil Exact International Equivalents
| Country/Region | Standard | Grade | Remarks |
|---|---|---|---|
| China | GB/T 4237 | 06Cr19Ni10NbN (new), 0Cr19Ni10NbN (old) | Stabilized and nitrogen strengthened, plate and coil |
06Cr19Ni10NbN Austenitic Stainless Steel Plate/Coil Application Introduction
06Cr19Ni10NbN is ideally suited for environments demanding both high mechanical strength and protection against intergranular corrosion, especially after welding. Its dual stabilization and strengthening enable thinner gauge designs, reducing weight and cost while maintaining integrity in aggressive chemical media.
Product Applications: Pressure vessels and reactors, Heat exchangers and condensers, Storage tanks for corrosive chemicals, Piping and tubing systems, Food processing machinery, Cryogenic tanks and transport vessels, Distillation columns
Processed into products: Flanges and gaskets, Valve bodies and seats, Pump casings and impellers, Welded pipe fittings (elbows, tees, reducers), Fasteners (bolts, nuts, studs), Dished heads for pressure vessels, Expansion joints, Filter housings
Application industries: Chemical Processing, Petrochemical & Refinery, Food & Beverage Processing, Pharmaceutical Manufacturing, Cryogenic Engineering, Power Generation (Nuclear & Thermal), Marine & Offshore Structures
06Cr19Ni10NbN Austenitic Stainless Steel Plate/Coil Similar Alternative Materials
| Country/Region | Standard | Grade | Remarks |
|---|---|---|---|
| Europe | EN 10088-2 | 1.4550 – X6CrNiNb18-10 | Niobium stabilized but without nitrogen; lower strength, similar intergranular corrosion resistance. |
| USA / ASTM | ASTM A240 | 347 (S34700) | Niobium stabilized austenitic stainless steel; no deliberate nitrogen addition; comparable corrosion resistance but lower yield strength. |
| USA / ASTM | ASTM A240 | 304N (S30451) | Nitrogen strengthened, no niobium; higher strength than 304 but lower pitting and intergranular corrosion resistance in welded condition. |
| Europe | EN 10088-2 | 1.4315 – X5CrNiN19-9 | Nitrogen alloyed, no niobium; similar strength but susceptible to sensitization. |
| China | GB/T 4237 | 06Cr19Ni10 (new) / 0Cr18Ni9 (old) – equivalent to AISI 304 | Standard 304 without Nb or N; used where high strength and weld zone corrosion resistance are not critical. |
Notes:
Heat treatment: Solution annealing at 1050°C to 1100°C followed by rapid cooling (water or air) is essential to dissolve chromium carbides and achieve optimum corrosion resistance. Welding: This grade is readily weldable by all common methods (TIG, MIG, SMAW, SAW) using filler metals with similar composition, such as ER347 or ER308L. No post-weld heat treatment is normally required due to niobium stabilization. Service temperature: Suitable for continuous use up to approximately 400°C; nitrogen addition improves high-temperature strength compared to standard 304. Corrosion resistance: Excellent resistance to a wide range of organic and inorganic chemicals, superior to standard 304 in environments causing sensitization. Resists intergranular corrosion and stress corrosion cracking in chloride-free media.
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