Stainless steels are known as high-alloy steels. They are classified into ferritic, austenitic, and martensitic steels based on their crystalline structure.
Grade 310S stainless steel is superior than 304 or 309 stainless steel in most environments, because it has high nickel and chromium content. It has high corrosion resistance and strength in temperatures up to 1149°C (2100°F). The following datasheet gives more details about grade 310S stainless steel.
The following table shows the chemical composition of grade 310S stainless steel.
|
Element |
Content (%) |
|
Iron, Fe |
54 |
|
Chromium, Cr |
24-26 |
|
Nickel, Ni |
19-22 |
|
Manganese, Mn |
2 |
|
Silicon, Si |
1.50 |
|
Carbon, C |
0.080 |
|
Phosphorous, P |
0.045 |
|
Sulfur, S |
0.030 |
Physical Properties
The physical properties of grade 310S stainless steel are displayed in the following table.
| Properties | Metric | Imperial |
| Density | 8 g/cm3 | 0.289 lb/in³ |
| Melting point | 1455°C | 2650°F |
Mechanical Properties
The following table outlines the mechanical properties of grade 310S stainless steel.
| Properties | Metric | Imperial |
| Tensile strength | 515 MPa | 74695 psi |
| Yield strength | 205 MPa | 29733 psi |
| Elastic modulus | 190-210 GPa | 27557-30458 ksi |
| Poisson’s ratio | 0.27-0.30 | 0.27-0.30 |
| Elongation | 40% | 40% |
| Reduction of area | 50% | 50% |
| Hardness | 95 | 95 |
Thermal Properties
The thermal properties of grade 310S stainless steel are given in the following table.
| Properties | Metric | Imperial |
| Thermal conductivity (for stainless 310) | 14.2 W/mK | 98.5 BTU in/hr ft².°F |
Other Designations
Other designations equivalent to grade 310S stainless steel are listed in the following table.
| AMS 5521 | ASTM A240 | ASTM A479 | DIN 1.4845 |
| AMS 5572 | ASTM A249 | ASTM A511 | QQ S763 |
| AMS 5577 | ASTM A276 | ASTM A554 | ASME SA240 |
| AMS 5651 | ASTM A312 | ASTM A580 | ASME SA479 |
| ASTM A167 | ASTM A314 | ASTM A813 | SAE 30310S |
| ASTM A213 | ASTM A473 | ASTM A814 | SAE J405 (30310S) |
Fabrication and Heat Treatment
Machinability
Grade 310S stainless steel can be machined similar to that of grade 304 stainless steel.
Welding
Grade 310S stainless steel can be welded using fusion or resistance welding techniques. Oxyacetylene welding method is not preferred for welding this alloy.
Hot Working
Grade 310S stainless steel can be hot worked after heating at 1177°C (2150°F). It should not be forged below 982°C (1800°F). It is rapidly cooled to increase the corrosion resistance.
Cold Working
Grade 310S stainless steel can be headed, upset, drawn, and stamped even though it has high work hardening rate. Annealing is performed after cold working in order to reduce internal stress.
Annealing
Grade 310S stainless steel is annealed at 1038-1121°C (1900-2050°F) followed by quenching in water.
Hardening
Grade 310S stainless steel does not react to heat treatment. Strength and hardness of this alloy can be increased by cold working.
Applications
Grade 310S stainless steel is used in the following applications:
Boiler baffles
Furnace components
Oven linings
Fire box sheets
Other high temperature containers.