ASTM A240 316 stainless steel sheets belong to the austenitic stainless steel family, which is characterized by its high levels of chromium and nickel. The addition of molybdenum in grade 316 further enhances its corrosion resistance, especially in environments where pitting and crevice corrosion are concerns, such as coastal and marine environments, and exposure to chloride solutions like seawater. In terms of mechanical properties, ASTM A240 316 sheets typically have a minimum tensile strength of around 515 MPa (75,000 psi) and a minimum yield strength of 205 MPa (30,000 psi). This combination of strength and corrosion resistance makes these sheets suitable for applications in aggressive environments where both mechanical integrity and resistance to degradation are vital.
The sheets might also undergo various heat treatment processes such as annealing, which involves heating the material to a specific temperature and then cooling it slowly to relieve stresses and improve its mechanical properties. This treatment also helps restore corrosion resistance that may have been affected during welding or other fabrication processes. When it comes to fabrication, ASTM A240 316 sheets are generally easy to work with using standard methods like cutting, forming, and machining. However, they can work-harden quickly, so proper tooling and techniques are important to maintain efficiency and prevent excessive tool wear.
In terms of certifications and testing, manufacturers and suppliers of ASTM A240 316 sheets often provide material certifications and testing reports that detail the chemical composition, mechanical properties, and any additional testing such as corrosion resistance testing, hardness testing, and more. This information is crucial for quality assurance and ensuring that the sheets meet the required specifications. It's important to emphasize that while ASTM A240 316 stainless steel sheets offer excellent corrosion resistance, they are not immune to corrosion under all circumstances. Proper maintenance and periodic cleaning are still necessary, especially in aggressive environments, to maximize their longevity and performance. Overall, ASTM A240 316 stainless steel sheets are versatile and widely used due to their exceptional combination of corrosion resistance, mechanical properties, and suitability for
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Specification:
| Property | Value |
| Grade | ASTM A240 316 |
| Material Composition | Chromium (Cr): 16-18% Nickel (Ni): 10-14% Molybdenum (Mo): 2-3% Iron (Fe): Balance Other Elements: Trace amounts |
| Tensile Strength | ≥ 515 MPa (75,000 psi) |
| Yield Strength (0.2% offset) | ≥ 205 MPa (30,000 psi) |
| Elongation | ≥ 40% |
| Hardness | ≤ 217 Brinell (HB) |
| Corrosion Resistance | Excellent in chloride-rich environments, pitting and crevice corrosion resistance |
| Heat Treatment | Annealing at temperatures around 1010-1150°C (1850-2100°F), followed by slow cooling |
| Surface Finish | Common finishes include 2B (cold-rolled, annealed, descaled), #4 (brushed), and #8 (mirror) |
| Weldability | Good weldability using standard methods, post-weld annealing may be required for optimal corrosion resistance |
| Applications | Chemical processing, marine engineering, food production, medical devices, architecture, etc. |
| Dimensions | Thickness: Typically available from 0.4 mm (0.0157 inches) to 12.7 mm (0.5 inches), and more, as per manufacturer specifications |
| Certifications | Material certifications, testing reports for chemical composition, mechanical properties, and more |
| Maintenance | Regular cleaning and maintenance required for optimal corrosion resistance |
Chemical Composition of ASTM A240 316 SHEETS
| Element | Composition Range |
| Chromium (Cr) | 16.0 - 18.0% |
| Nickel (Ni) | 10.0 - 14.0% |
| Molybdenum (Mo) | 2.0 - 3.0% |
| Iron (Fe) | Balance |
| Carbon (C) | ≤ 0.08% |
| Manganese (Mn) | ≤ 2.0% |
| Silicon (Si) | ≤ 0.75% |
| Phosphorus (P) | ≤ 0.045% |
| Sulfur (S) | ≤ 0.03% |
| Nitrogen (N) | ≤ 0.10% |
Mechanical Properties of ASTM A240 316 SHEETS
| Property | Value |
| Tensile Strength | ≥ 515 MPa (75,000 psi) |
| Yield Strength (0.2% offset) | ≥ 205 MPa (30,000 psi) |
| Elongation | ≥ 40% |
| Hardness | ≤ 217 Brinell (HB) |
| Modulus of Elasticity | 193 GPa (28 x 10^6 psi) |
| Poisson's Ratio | 0.27 |
Advantages of ASTM A240 316 SHEETS
- Good general corrosion resistance and high strength
- Good sulfide stress corrosion resistance
- Resistance to chloride pitting and crevice corrosion
- Higher resistance to chloride stress corrosion cracking
- Easy to weld and conform
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