The high quality China GBT K640 material is one of the more steel grades we supply, Age hardening type Nickel base alloy. K640 is our main production grade, which has been approved by customers in many countries since its initial production, including our K640 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 K640 materials, and we are willing to develop together with customers from all over the world.
Also includes K640 steel material norm, chemical composition, mechanical properties, datasheet, K640 equivalent, heat treatment and temperature process of K640, The peak hardness can be achieved, Contains all of the specification, welding properties, let us in K640 this steel grade have a more comprehensive understanding, Download the full K640 PDF version of this datasheet.
| C(％) | Si(％) | Mn(％) | P(％) | S(％) | Cr(％) | Ni(％) | W(%) |
|---|---|---|---|---|---|---|---|
| 0.45-0.55 | Max 1 | Max 1 | Max 0.04 | Max 0.04 | 24.5-26.5 | 9.50-11.5 | 7.00-8.00 |
| Co(%) | |||||||
| Balance |
| Rp0.2 (MPa) | Rm (MPa) | Impact KV (J) |
Elongation A (%) |
A Z (%) | Delivery | Hardness HB |
|---|---|---|---|---|---|---|
| 587 (≥) | 166 (≥) | 41 | 34 | 21 | Solution & Aging, Ann, Ausaging, Q+T | 313 |