008Cr30Mo2 (00Cr30Mo2) Ferritic Stainless Steel
008Cr30Mo2 (00Cr30Mo2) Ferritic Stainless Steel - High Cr & Mo for Superior Corrosion Resistance
Comprehensive material data for 008Cr30Mo2 (formerly 00Cr30Mo2) ferritic stainless steel plate and coil according to GB/T 4237, including chemistry, mechanical and physical properties.
Hot rolling, cold rolling, welding, forming, machining, pickling
- Phone : +8618037372205
- Email : [email protected]
- WhatsApp: Contact via Whtsapp
- WeChat: +8618037372205
008Cr30Mo2 Ferritic Stainless Steel Introduction
008Cr30Mo2, also known as 00Cr30Mo2, is an ultra-low carbon, high-chromium ferritic stainless steel specified in GB/T 4237 for hot-rolled plates and coils. It contains approximately 30% Cr and 2% Mo, delivering outstanding resistance to pitting, crevice corrosion, and stress corrosion cracking in chloride-containing environments. The extremely low carbon and nitrogen levels minimize sensitization and intergranular corrosion, while the ferritic structure provides high thermal conductivity and a low thermal expansion coefficient compared to austenitic grades. This grade is commonly supplied in the annealed and pickled condition and is widely used in chemical processing, desalination, and power generation industries.
008Cr30Mo2 Ferritic Stainless Steel Chemical Composition
Chemical composition specified in GB/T 4237-2015 for 008Cr30Mo2. All values are maximum unless a range is indicated. Elements not listed must comply with the standard's general limits for impurities.
| Chemical Element | Standard Value (wt%) | Remarks |
|---|---|---|
| Carbon (C) | ≤0.010 | Ultra-low carbon for enhanced corrosion resistance |
| Silicon (Si) | ≤0.40 | Deoxidizer, improves oxidation resistance |
| Manganese (Mn) | ≤0.40 | Deoxidizer, balances austenite formers |
| Phosphorus (P) | ≤0.030 | Impurity, controlled for toughness |
| Sulfur (S) | ≤0.020 | Impurity, controlled for hot workability |
| Chromium (Cr) | 28.50 – 32.00 | Primary element for corrosion and oxidation resistance |
| Molybdenum (Mo) | 1.50 – 2.50 | Improves pitting and crevice corrosion resistance |
| Nitrogen (N) | ≤0.015 | Low nitrogen to avoid sensitization |
| Nickel (Ni) | ≤0.50 | Residual; kept low to maintain ferritic structure |
| Copper (Cu) | ≤0.20 | Residual; may slightly affect corrosion in some media |
008Cr30Mo2 Ferritic Stainless Steel Thermal and Electrical Physical Properties
Typical physical properties of 008Cr30Mo2 in the annealed condition. Values are indicative and may vary slightly depending on exact composition and processing.
- Density at room temperature.
- Elastic moduli measured dynamically.
- Thermal expansion and conductivity values for common temperature ranges.
| Property | Typical Value | Unit | Test Condition / Temperature |
|---|---|---|---|
| Density (ρ) | 7.64 | g/cm³ | At 20°C |
| Elastic Modulus (E) | 220 | GPa | At 20°C |
| Shear Modulus (G) | 84 | GPa | At 20°C |
| Poisson's Ratio (ν) | 0.28 | --- | At 20°C |
| Thermal Expansion Coefficient (α) | 10.4 | 10⁻⁶/K | 20 – 100°C |
| Thermal Expansion Coefficient (α) | 11.0 | 10⁻⁶/K | 20 – 300°C |
| Thermal Expansion Coefficient (α) | 11.5 | 10⁻⁶/K | 20 – 500°C |
| Thermal Conductivity (λ) | 17 | W/(m·K) | At 100°C |
| Thermal Conductivity (λ) | 20 | W/(m·K) | At 300°C |
| Thermal Conductivity (λ) | 22 | W/(m·K) | At 500°C |
| Specific Heat Capacity (cp) | 460 | J/(kg·K) | At 20°C |
| Electrical Resistivity (ρe) | 0.76 | μΩ·m | At 20°C |
008Cr30Mo2 Ferritic Stainless Steel Mechanical Properties
Mechanical properties for hot-rolled plate in the solution annealed condition according to GB/T 4237-2015. Tests are performed at room temperature.
- Yield strength (Rp0.2) is based on 0.2% offset method.
- Elongation is measured on a gauge length of 50 mm (A50) or proportional specimen.
- Bend test conducted with bend angle 180° and specified mandrel diameter.
| Property | Standard Requirement | Unit | Test Condition |
|---|---|---|---|
| Yield Strength (Rp0.2) | ≥450 | MPa | Room temperature |
| Tensile Strength (Rm) | ≥585 | MPa | Room temperature |
| Elongation (A) | ≥20 | % | Gauge length A50 |
| Hardness | ≤219 | HBW | --- |
| Bend Test (180°) | D=2a (no cracks) | --- | Mandrel diameter equals twice plate thickness (a) |
008Cr30Mo2 Ferritic Stainless Steel Completely Equivalent Material Standards & Substitutable Grades
| Country / Region | Standard | Grade | Remarks |
|---|---|---|---|
| China | GB/T 4237 | 008Cr30Mo2 | Hot-rolled plate/coil, the base specification |
| China | GB/T 3280 | 008Cr30Mo2 | Cold-rolled stainless steel plate/strip |
| China | GB (obsolete) | 00Cr30Mo2 | Former designation, chemically identical |
008Cr30Mo2 Ferritic Stainless Steel Application Introduction
008Cr30Mo2 super ferritic stainless steel is designed for demanding environments where chloride-induced stress corrosion cracking, pitting, and crevice corrosion are critical concerns. Its high chromium and molybdenum content, combined with ultra-low carbon and nitrogen, ensure long-term reliability in oxidizing media and under cyclic thermal conditions. The material is readily weldable with appropriate nickel-base fillers and can be cold formed using procedures for ferritic grades.
Product Applications: Shell-and-tube heat exchangers, Condenser tubes and tube sheets, Pressure vessels for corrosive chemicals, Storage tanks for acids and brines, Process piping systems, Seawater intake and brine handling pipes
Processed into products: Tube sheets for heat exchangers, Baffles and support plates, Reactor vessels, Evaporator bodies, Demisters and separators, Flanges and fittings for corrosive service, Valve bodies
Application industries: Chemical Processing, Seawater Desalination, Power Generation (condensers, heat exchangers), Oil & Gas (offshore platforms), Food & Beverage Equipment, Pharmaceutical Industry, Marine Engineering
008Cr30Mo2 Ferritic Stainless Steel Recommended Similar / Alternative Materials
| Country / Region | Standard | Grade | Remarks |
|---|---|---|---|
| USA | ASTM A240 | UNS S44735 (29-4C) | Higher Mo (3.5‑4.2%), better pitting resistance; slightly lower chromium (28‑30%) |
| Japan | JIS G4304 / G4305 | SUS447J1 | 28Cr‑3Mo‑Ti; titanium stabilized, good corrosion performance similar to S44735 |
| USA | ASTM A240 | UNS S44800 (29-4-2) | Contains 2% Ni, higher toughness but may affect ferritic stability |
Notes:
All data presented are based on GB/T 4237-2015 and publicly available reference materials for 008Cr30Mo2. Actual properties may vary with product thickness and manufacturing route. For critical applications, consult the material supplier and request a certified mill test report. This grade is not recommended for applications requiring high toughness at cryogenic temperatures due to the ductile-to-brittle transition inherent to ferritic stainless steels.
- Share
