What is 1.4310 material?
1.4310 is a European (EN) designation for a stainless steel, commonly known as AISI 301 or 302. It's an austenitic stainless steel known for its high strength, good corrosion resistance, and ability to be strengthened through cold working. This material is often used in applications requiring spring properties and is also suitable for welding.
What is stainless steel 1.4305?
Stainless steel type 1.4305 is popularly known as grade 303 stainless steel. Grade 303 is the most readily machineable of all the austenitic grades of stainless steel. The machineable nature of grade 303 is due to the presence of Sulphur in the steel composition.
Key Differences in Composition
| Element | 1.4310 (AISI 301) | 1.4305 (AISI 303) |
|---|---|---|
| Carbon (C) | 0.12 – 0.15% | 0.15% max |
| Chromium (Cr) | 16.0 – 18.0% | 16.0 – 18.0% |
| Nickel (Ni) | 6.0 – 8.0% | 9.0 – 11.0% |
| Manganese (Mn) | 2.0 – 3.0% | 2.0 – 3.0% |
| Silicon (Si) | 0.75% max | 0.75% max |
| Phosphorus (P) | 0.045% max | 0.045% max |
| Sulfur (S) | 0.30% max | 0.30% max |
Mechanical Properties of 1.4310 vs. 1.4305 Stainless Steel
| Property | 1.4310 (AISI 301) | 1.4305 (AISI 303) |
|---|---|---|
| Tensile Strength (MPa) | 650 – 1100 | 500 – 750 |
| Yield Strength (MPa) | ≥ 310 | ≥ 205 |
| Elongation (%) | ≥ 40 | ≥ 40 |
| Hardness (HB) | 200 – 250 | 200 – 240 |
| Modulus of Elasticity (GPa) | 190 – 200 | 190 – 200 |
| Poisson's Ratio | 0.29 | 0.29 |
| Density (g/cm³) | 8.0 | 8.0 |
| Thermal Conductivity (W/m·K) | 16.2 | 16.2 |
Corrosion Resistance
Both 1.4310 and 1.4305 are austenitic stainless steels with comparable basic corrosion resistance (e.g., in atmospheric, freshwater, and weak acidic environments). However, 1.4305, with its higher nickel content, exhibits slightly better pitting/crevice corrosion resistance in chloride-containing (e.g., seawater) or weakly acidic environments. 1.4310, due to its slightly higher carbon content, requires attention to the risk of sensitization caused by carbide precipitation during long-term use at high temperatures (e.g., 400-800°C); solution treatment is necessary after welding.
is EN 1.4310 stainless steel magnetic?
EN 1.4310 stainless steel, also known as AISI 301, is not inherently magnetic but can become magnetic through cold working.
Do 1.4310 and 1.4301 have good corrosion resistance?
1.4310 stainless steel offers moderate corrosion resistance, similar to 1.4301, but is susceptible to intergranular corrosion, especially after welding or at elevated temperatures. It is generally resistant to water, humidity, and some acids, but should be avoided in chloride-containing environments
Heat treatment
The following is material 1.4310 heat treatment, such as hot forming, solution annealing.
Hot forming: 1200 – 900 ℃ (cooling: air)
Solution annealing: 1000 – 1100 ℃ (cooling: water, air)
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