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Special Alloy

GBT GB 70

The high quality China GBT GB 70 material is one of the more steel grades we supply, China structural steel and alloy steel. GB 70 is our main production grade, which has been approved by customers in many countries since its initial production, including our GB 70 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 GB 70 materials, and we are willing to develop together with customers from all over the world.

Also includes GB 70 steel material norm, chemical composition, mechanical properties, datasheet, GB 70 equivalent, heat treatment and temperature process of GB 70, The peak hardness can be achieved, Contains all of the specification, welding properties, let us in GB 70 this steel grade have a more comprehensive understanding, Download the full GB 70 PDF version of this datasheet.

2015-08-10 15:58:57 Print this page

Chemical composition (wt.%)

C(%) Si(%) Mn(%) P(%) S(%) Cr(%) Ni(%)
0.62-0.70 0.17-0.37 0.50-0.80 0.035 0.035 Max 0.25 Max 0.25

Mechanical Properties

Rp0.2 (MPa) Rm (MPa) Impact
KV (J)
Elongation
A (%)
A Z (%) Delivery Hardness HB
536 (≥) 784 (≥) 34 43 24 Solution & Aging, Ann, Ausaging, Q+T 424

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