O1 Tool Steel

1.2510

EN1.2510
EN100MnCrW4
AISIO1

Oil-hardening general-purpose cold work tool steel with easy machining and low distortion. Widely used for small and medium-size cutting tools and gauges.

01Material Properties

Oil hardening; low hardening temperature
Easy machinability
Good edge retention
Low distortion
Heat treated to 58–64 HRC

02Applications

Cutting and punching dies
Reamers, taps and hand tools
Woodworking knives
Gauges and measuring instruments
Small plastic molds and mold pins

03Delivery Condition

Max. 229 HB, soft annealed.

04Heat Treatment

Typical values

Soft annealing: 710–750 °C; max. 229 HB
Stress relieving: 600–650 °C
Preheating: 600–650 °C
Hardening: 790–830 °C; 15–30 min
Quenching medium: Oil or 180–220 °C salt bath
As-quenched hardness: ≈ 63–65 HRC
Tempering: 150–300 °C, once or twice
Working hardness: 58–63 HRC

Heat treatment cycle (schematic)

Stages and temperatures are typical values; soaking times depend on section size.

Tempering diagram (approximate)

Approximate hardness versus tempering temperature after hardening from the typical austenitising temperature.

Values are approximate and for information only; they vary with section size, heat and furnace conditions. Binding values are determined from the manufacturer’s data under laboratory conditions.

Have a material requirement?

Send us your specification, drawing or RFQ. Our team will review the requirement and identify a suitable supply option.

Request O1 Quotation Sell Your Scrap