AISI 310 vs 310S stainless steel: heat resistance
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What is AISI 310 stainless steel?
Stainless steel is a high-carbon, high-chromium-nickel austenitic stainless steel. It possesses excellent mechanical properties, high-temperature oxidation resistance, and heat resistance. Type 310S is a low-carbon version of SS 310, while 310H is designed for optimal creep strength and creep rupture strength. Niobium is added to 310Cb to maximize carbide stability, prevent sensitization, and improve weldability and high-temperature creep strength.
What is the difference between 310 and 310S stainless steel?
The main difference lies in the carbon content; the maximum carbon content of 310S (0.08%) is lower than that of 310 (0.25%). This makes 310S more suitable for welding applications because the lower carbon content reduces the risk of carbide precipitation and improves its resistance to intergranular corrosion.
AISI 310 vs 310S stainless steel: chemical composition
The table below highlights the main differences in chemical composition between stainless steel 310 and stainless steel 310s:
| Element | Stainless Steel 310 | Stainless Steel 310S |
|---|---|---|
| Carbon (C) | Up to 0.25% | Up to 0.08% |
| Chromium (Cr) | 24–26% | 24–26% |
| Nickel (Ni) | 19–22% | 19–22% |
| Manganese (Mn) | Up to 2% | Up to 2% |
| Silicon (Si) | Up to 1.5% | Up to 1.5% |
| Phosphorus (P) | Up to 0.045% | Up to 0.045% |
| Sulfur (S) | Up to 0.03% | Up to 0.03% |
| Iron (Fe) | Balance | Balance |
AISI 310 vs 310S stainless steel: Mechanical properties
| Property | Stainless Steel 310 | Stainless Steel 310S |
|---|---|---|
| Ultimate Tensile Strength | 92.7 ksi | ~80-85 ksi |
| Yield Tensile Strength | 43.5 ksi | ~35-40 ksi |
| Elongation | 40% | 45% |
| Hardness | 225 HV | 217 HV |
AISI 310 vs 310S stainless steel:Physical properties
310 and 310S stainless steels possess similar physical and thermal properties. Both have a density of 0.289 psi, ensuring structural stability in high-temperature applications. The thermal conductivity of these alloys increases with temperature, reaching 31.7 W/m·K at 1500 K. Specific heat capacity also increases with temperature.
| Temperature (K) | Specific Heat (kJ/kg·K) | Thermal Conductivity (W/m·K) |
|---|---|---|
| 100 | 0.272 | 9.2 |
| 300 | 0.477 | 14.9 |
| 600 | 0.557 | 19.8 |
| 1000 | 0.611 | 25.4 |
| 1500 | 0.682 | 31.7 |
AISI 310 vs 310S stainless steel: heat resistance
The main difference between AISI 310 and 310S lies in their carbon content, which directly affects their high-temperature resistance and corrosion resistance. Due to its lower carbon content, 310S stainless steel is less prone to carbide precipitation at high temperatures, thus exhibiting better oxidation resistance, creep strength, and high-temperature corrosion resistance. Therefore, it is more suitable for long-term use in oxidizing environments up to 1100°C. In contrast, standard 310 is more prone to corrosion at high temperatures and is more suitable for short-term or intermittent high-temperature applications.
Weldability of 310 and 310S Stainless Steel
Both 310 and 310S stainless steels possess good weldability and corrosion resistance, but their properties differ due to their varying carbon content. 310 stainless steel has a higher carbon content, which increases the risk of carbide formation during welding. 310S stainless steel has a lower carbon content, resulting in less carbide formation. This characteristic improves weldability and post-weld corrosion resistance. Manufacturers typically choose 310S stainless steel for welded structures because it reduces the risk of weld-related failures.
As a leading supplier and manufacturer of 310/310S austenitic stainless steel in China, 310/310S stainless steel is widely used in heat treatment equipment, industrial furnace tubes, chemical equipment, and other fields due to its excellent high-temperature strength and oxidation resistance. We have sufficient inventory to ensure fast delivery and offer competitive prices. Whether you need bulk purchases or customized solutions, our 310/310S stainless steel can meet your needs.
Product Forms: Shapes: Plate, Strip, Coil, Tube, Foil, etc.
Surface Finishes: No.1, 2D, 2B, BA, HL, No.4, Mirror, SB, Embossed, Etched, etc.
If you want to purchase 310S stainless steel products, please contact the appropriate supplier-GNEE-for the latest 310S stainless steel prices.
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