Super stainless steel round bar

Super stainless steel is a type of stainless steel with excellent corrosion resistance and mechanical properties. Here is an introduction to some common super stainless steel materials in American (ASTM), German (DIN), and European (EN) standards, including their chemical composition, mechanical properties, and application fields:

1. American Standard (ASTM):

- N08904 (UNS S39042) - 904L Super Austenitic Stainless Steel:

- Chemical Composition:

- Nickel (Ni): 23% - 28%

- Chromium (Cr): 19% - 23%

- Molybdenum (Mo): 4% - 5%

- Copper (Cu): 1% - 2%

- Iron (Fe): balance

- Carbon (C): ≤ 0.02%

- Manganese (Mn): ≤ 2.0%

- Silicon (Si): ≤ 0.7%

- Phosphorus (P): ≤ 0.045%

- Sulfur (S): ≤ 0.035%

- Mechanical Properties:

- Tensile Strength: ≥ 490 MPa

- Yield Strength: ≥ 220 MPa

- Elongation: ≥ 35%

- Application Fields: Widely used in the chemical industry, petrochemical industry, such as reactors, heat exchangers, and sulfuric acid storage and transportation equipment. It is also used in power plant flue gas desulfurization devices, paper industry equipment, and other fields that require high corrosion resistance.

- N08020 (UNS S32750) - Super Austenitic Stainless Steel:

- Chemical Composition:

- Nickel (Ni): 32% - 38%

- Chromium (Cr): 22% - 26%

- Molybdenum (Mo): 3% - 5%

- Copper (Cu): 3% - 5%

- Iron (Fe): balance

- Carbon (C): ≤ 0.03%

- Manganese (Mn): ≤ 2.0%

- Silicon (Si): ≤ 1.0%

- Phosphorus (P): ≤ 0.045%

- Sulfur (S): ≤ 0.035%

- Mechanical Properties:

- Tensile Strength: ≥ 620 MPa

- Yield Strength: ≥ 300 MPa

- Elongation: ≥ 30%

- Application Fields: Applied in sulfuric acid environments, phosphoric acid production equipment, petrochemical equipment, and other industries with harsh corrosive environments.

2. German Standard (DIN):

- 1.4529 (X1NiCrMoCuN25-20-7) - Super Austenitic Stainless Steel:

- Chemical Composition:

- Nickel (Ni): 24% - 26%

- Chromium (Cr): 19% - 21%

- Molybdenum (Mo): 6% - 7%

- Copper (Cu): 0.5% - 1.5%

- Iron (Fe): balance

- Carbon (C): ≤ 0.02%

- Manganese (Mn): ≤ 2.0%

- Silicon (Si): ≤ 0.5%

- Nitrogen (N): 0.15% - 0.25%

- Titanium (Ti): 0.6% - 1.2%

- Phosphorus (P): ≤ 0.03%

- Mechanical Properties:

- Tensile Strength: ≥ 650 MPa

- Yield Strength: ≥ 295 MPa

- Elongation: ≥ 35%

- Application Fields: Used in fire protection systems, seawater purification systems, hydraulic and infusion pipeline systems in ocean engineering, and other fields that require high corrosion resistance and good mechanical properties.

3. European Standard (EN):

- EN 1.4462 (X2CrNiMoN22-5-3) - Duplex Stainless Steel:

- Chemical Composition:

- Nickel (Ni): 4.5% - 6.5%

- Chromium (Cr): 21% - 23%

- Molybdenum (Mo): 2.5% - 3.5%

- Nitrogen (N): 0.1% - 0.22%

- Iron (Fe): balance

- Carbon (C): ≤ 0.03%

- Manganese (Mn): ≤ 2.0%

- Silicon (Si): ≤ 1.0%

- Phosphorus (P): ≤ 0.035%

- Sulfur (S): ≤ 0.02%

- Mechanical Properties:

- Tensile Strength: ≥ 620 MPa

- Yield Strength: ≥ 450 MPa

- Elongation: ≥ 25%

- Application Fields: Suitable for applications in the chemical industry, oil and gas industry, and marine engineering, such as pipelines, valves, and pressure vessels.

It should be noted that the above are just some common super stainless steel materials in different standards, and there are other types of super stainless steel materials with different compositions and properties in these standards, which are used in various specific application scenarios according to different requirements.

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