High Hardness 440A Stainless Steel Bars Hot Rolled SS Bar OD10 - 200mm Solid Solution & Aging Finishing
High Hardness 440A Stainless Steel Bars Hot Rolled SS Bar OD10 - 200mm Solid Solution & Aging Finishing
| Products | Stainless Steel Bar |
| Grade | 440A |
| Diameter | 5 - 350mm |
| Length | 6m or custom cutting any length as request |
| Finishing | Bright Bar / Black Surface |
| Heat Treatment | Solid Solution , ageing |
| Surface Process | Polishing , Peeling |
| Other Grade |
201 303 304 304L 309S 310S 316L 316Ti 317L 321 347 410 420 430 431 2205 2507 904L 254SMO 416 431 440A/B/C.etc |
| MOQ | 500 Kgs |
| Loading Port | Shanghai Port |
| Processing | Cutting |
| Packing | Wooden box or wrapping by PP bag |
Industry Names
- 440A Stainless Steel
- 440A Stainless
Material
- Stainless Steel
Specifications
- UNS S44002
Applications
- Aircraft Structural Parts
- Bearings
- Medical Instruments
- Molds
- Turbine Components
Features
- Corrosion Resistance
- Magnetic
- Martensitic
440A is a high carbon martensitic stainless steel that is AOD melted. This alloy can be heat treated to extremely high hardnesses. It has slightly less carbon than 440B and 440C giving it better machinability but less hardness. The combination of good wear resistance and high hardness makes this alloy an excellent candidate for cutting tools and knife blades. It also is often used for dental and surgical equipment.
Chemical Composition of 440A Stainless Steel
The chemical composition of grade 440A stainless steel is outlined in the following table.
| Element | Content (%) |
|---|---|
| Iron, Fe | Balance |
| Chromium, Cr | 16-18 |
| Manganese, Mn | 1 |
| Silicon, Si | 1 |
| Molybdenum, Mo | 0.75 |
| Carbon, C | 0.60-0.75 |
| Sulfur, S | 0.03 |
| Phosphorous, P | 0.04 |
Mechanical Properties of 440A Stainless Steel
The mechanical properties of grade 440A stainless steel are displayed in the following table.
| Properties | Metric | Imperial |
|---|---|---|
| Tensile strength | 725-1790 MPa | 105000 - 260000 psi |
| Yield strength (@strain 0.200 %) | 415-1650 MPa | 60200 - 239000 psi |
| Modulus of elasticity | 204 - 215 GPa | 29600 - 31200 ksi |
| Elongation at break (in 50 mm) | 5- 20% | 5- 20% |
| Hardness, Rockwell B | 95 | 95 |
440A Stainless Steel Equivalent
| AISI 440A | AMS 5631 | AMS 5632 | ASTM A276 | ASTM A314 |
| ASTM A473 | ASTM A511 | ASTM A580 | QQ S763 | SAE 51440A |
| FED QQ-S-763 | MIL-SPEC MIL-S-862 | SAE J405 (51440A) |
Applications
Grade 440A stainless steel is widely used in the following applications:
- Cutlery
- Bearings
- Gage blocks
- Molds and dies
- Valve components
- Turbine components
- Medical instruments
- Aircraft structural parts
- Knives and measuring instruments
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