The high quality Korea KS STS440A material is one of the more steel grades we supply, martensitic steel. STS440A is our main production grade, which has been approved by customers in many countries since its initial production, including our STS440A round bars, flat bar, forgings, fasteners, tubes, wires, strips, sheets & Plates, as well as a variety of profiles, professional high precision auto-lathe processing manufacturer of clinching fasteners, axes, standoffs, screws, studs, nuts, bolt, OEM parts and special shaped turning partsthe state of delivery includes quenched and tempered, annealed, machined semi-finished products, we also have strict management of the packaging, to avoid material damage from transportation. We are the best supplier of STS440A materials, and we are willing to develop together with customers from all over the world.
Also includes STS440A steel material norm, chemical composition, mechanical properties, datasheet, STS440A equivalent, heat treatment and temperature process of STS440A, The peak hardness can be achieved, Contains all of the specification, welding properties, let us in STS440A this steel grade have a more comprehensive understanding, Download the full STS440A PDF version of this datasheet.
| C(％) | Si(％) | Mn(％) | P(％) | S(％) | Cr(％) | Ni(％) | Mo(％) |
|---|---|---|---|---|---|---|---|
| 0.60-0.75 | Max 1.00 | Max 1.00 | Max 0.04 | Max 0.03 | 16.0-18.O | Max 0.60 | Max 0.75 |
| Rp0.2 (MPa) | Rm (MPa) | Impact KV (J) |
Elongation A (%) |
A Z (%) | Delivery | Hardness HB |
|---|---|---|---|---|---|---|
| 652 (≥) | 756 (≥) | 42 | 23 | 23 | Solution & Aging, Ann, Ausaging, Q+T | 213 |