O7 Tool steel is a cold work steel belong to ASTM A681-1999 Steel Grade standard. O7 Steel China Supplier and factory Otai Special Steel Supply O7 Cold Work Tool steel in Round bar, Plate, Flat bar, Square, Forging Ring and others any shape. And provide cutting, sawing, milled, machining processing.
O7 Steel Round Bar: diameter 5mm – 400mm
O7 Steel Plate: thickness 10 –500mm x width 200– 1400mm
O7 Steel Block: 210mm x 500-810mm
Hardness, Rockwell C: 65 HRc, Density: 7.67kg/m3
Izod impact unnotched: .
Melting point:
Thermal expansion: 12.48 mm/m°C (25-250 ºC)
Elastic modulus: 190-210 GPa (at 25 ºC ).
Forged O7 tool steel at 820-1070 ºC. no forging when below 800 ºC.
Slowly heat to 790 ºC, keep enough time, ensure heat thoroughly. then cooling in furnace at 4-5 ºC per hour. After annealing, the hardness 217 HBS Max.
/ ℃ quenching temperature: 790~840
Quenching medium: oil
/ ℃ tempering temperature: 150 ~ 320
After tempering hardness HRC: 63-58
O7 tool steel used for cold work tool products. Like stamping die, paper cutter appliances.
Quality assured by Our ISO 9001:2008 quality management system. Our all O7 tool steel all had by SEP 1921-84 ultrasonic inspection (UT Test). Quality Grade: E/e, D/d, C/c.
If you have any O7 steel inquiry and question for Price, Application, hot treatment, please don’t hesitate to contact us.
Email: bonnie@yilametal.com
Tel: +86-13921113089
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