What is the composition of SS 310 plate?

What is 310S stainless steel?

310S stainless steel (also known as 1.4845) is a high-alloy steel and a low-carbon version of 310 stainless steel. Its lower carbon content helps minimize the formation of carbide precipitation during welding and improves its resistance to intergranular corrosion. It also has improved resistance to stress corrosion cracking, making it more suitable for use in high-temperature applications, such as furnace components, heat exchangers, and heat treatment equipment.

 

Chemical Composition of 310S Stainless Steel (%)

Element	Content (%)
Chromium (Cr)	24.0 – 26.0
Nickel (Ni)	19.0 – 22.0
Silicon (Si)	0.5 – 1.5
Manganese (Mn)	≤ 2.0
Carbon (C)	≤ 0.08
Sulfur (S)	≤ 0.03
Phosphorus (P)	≤ 0.045
Iron (Fe)	Balance

Physical Properties of 310S Stainless Steel

Property	Value
Density	8.0 g/cm³
Melting Point	1402 – 1454 °C (2555 – 2650 °F)
Thermal Expansion	16.3 × 10⁻⁶ /°C (20–100°C)
Thermal Conductivity	14.2 W/m·K

Mechanical Properties of 310S Stainless Steel

Property	Value
Tensile Strength	515 – 655 MPa (75 – 95 ksi)
Yield Strength	205 – 310 MPa (30 – 45 ksi)
Elongation	40%
Hardness (Brinell)	217 HB
Modulus of Elasticity	193 GPa (28 × 10⁶ psi)

310S stainless steel has several variants to meet specific application needs:

1.310H: This is a high-carbon version of 310 with a carbon content of 0.04-0.10%, designed for use in high-temperature environments above 800°C.

2.310MoLN: This variant is designed for use in reducing environments, such as urea and ammonium nitrate production, and contains higher molybdenum and nitrogen content than standard 310, which improves its resistance to pitting and crevice corrosion.

3.310Si: This variant is designed for applications that require high silicon content, such as electric furnace steelmaking, continuous casting, and glass furnace linings.

4.310L: This is a low-carbon version of 310 with a maximum carbon content of 0.03% and is used in welding applications where the steel will be exposed to high temperatures above 800°C.

 

What is the difference between 310 and 310S?

The primary difference between 310 and 310S stainless steel is the carbon content. 310S is a low-carbon version of 310, with a maximum carbon content of 0.08% compared to 0.25% for 310. This lower carbon content in 310S improves its weldability and resistance to intergranular corrosion (especially in the sensitization range of 500-800°C). Both grades are known for their high temperature strength and oxidation resistance, but 310S is generally preferred for applications where welding is involved or where there's a risk of carbide precipitation at high temperatures.

 

What is the difference between SS 310 and 304?

Grade 310 has good oxidation resistance up to 1050°C and 1035°C in continuous and intermittent operations respectively. On the other hand, Grade 304 has also offered oxidation resistance up to 925°C and 870°C in continuous and intermittent operations respectively.