The high quality China GBT 40B material is one of the more steel grades we supply, China structural steel and alloy steel. 40B is our main production grade, which has been approved by customers in many countries since its initial production, including our 40B 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 40B materials, and we are willing to develop together with customers from all over the world.
Also includes 40B steel material norm, chemical composition, mechanical properties, datasheet, 40B equivalent, heat treatment and temperature process of 40B, The peak hardness can be achieved, Contains all of the specification, welding properties, let us in 40B this steel grade have a more comprehensive understanding, Download the full 40B PDF version of this datasheet.
| C(％) | Si(％) | Mn(％) |
|---|---|---|
| 0.37-0.44 | 0.17-0.37 | 0.60-0.90 |
| B(%) | ||
| 0.0005-0.0035 |
| Rp0.2 (MPa) | Rm (MPa) | Impact KV (J) |
Elongation A (%) |
A Z (%) | Delivery | Hardness HB |
|---|---|---|---|---|---|---|
| 182 (≥) | 614 (≥) | 43 | 13 | 34 | Solution & Aging, Ann, Ausaging, Q+T | 124 |