Grade 431 stainless steels are martensitic, heat-treatable grades with excellent corrosion resistance, torque
strength, high toughness and tensile properties. All these properties make them ideal for bolt and shaft
applications. These steels, however, cannot be cold-worked owing to their high yield strength, hence they are
suitable for operations such as spinning, deep drawing, bending or cold heading.
Fabrication of martensitic steels is generally carried out using techniques that allow hardening and tempering
treatments and poor weldability. The corrosion resistance properties of grade 431 steels are lower than that
of austenitic grades. The operations of grade 431 are limited by their loss of strength at high temperatures,
due to over-tempering, and loss of ductility at negative temperatures.
Element | Content(%) |
---|---|
Chromium, Cr | 15 - 17 |
Nickel, Ni | 1.25 - 2.50 |
Manganese, Mn | 1 |
Silicon, Si | 1 |
Carbon, C | 0.20 |
Phosphorous, P | 0.04 |
Sulfur, S | 0.03 |
Properties | Metric | Imperial |
---|---|
Tempering Temperature (°C) | Annealed * |
Tensile strength, ultimate | 862 |
Tensile strength, yield (@0.2%) | 655 |
Elongation at break (in 50 mm) | 20 |
Hardness, Brinell (HB) | 285 max |
Impact Charpy V (J) | - |
Production Route | Hot Rolled, Cold Rolled |
---|---|
Material Standard | AISI, ASTM, ASME, DIN, BS, EN, ISO, JIS, GOST, SAE, IS & Custom Chemistry |
Size | Width from 100mm to 3000mm ; Length from 500mm to 12000mm |
Thickness | 0.1mm to 400mm |
Delivery Condition | As Rolled, Annealed, Quenched and Tempered, Normalized |
Surface Finish | Plain, Brushed, Cladded |
1) Structures in Buildings, bridges, railway stations.
2) Fabrication of pipeline components & Industrial equipment.
3) Construction of automotive bodies, warehouses, shipping containers.
4) Commercial appliances, etc.