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OHNS / O1 Cold Work Tool Steel

 

CHEMICAL COMPOSITION (Typical Analysis in %)

C Si Mn P S Cr W
0.85-1.00 0.15-0.35 1.00-1.20 0.030max 0.030max 0.50-0.70 0.50-0.70

OHNS O1 steel is a oil-hardening and non-shrinking cold work tool steel with properties such as good durability, excellent wear resistance and holds a good cutting edge. It is an excellent general purpose tool steel often used where the expense of a high carbon high chromium tool steel would not be justified. This grade is an oil hardening tool steel type supplied in the annealed condition.

 

STEEL PROPERTIES

OHNS O1 cold work steel is an equivalent of DIN 2510. The grade AISI O1 tool steel is an oil-hardening, non-shrinking tool steel and has a good cutting edge retention, high hardenability and dimensional stability during heat treatment.

 

APPLICATION

Being a general-purpose tool steel, it is typically used in applications where alloy steels cannot provide sufficient hardness, strength, and wear resistance. In blanking and stamping dies for cutting sheets up to 6 mm thickness, drills, shear blades, gauges, threading tools, broaches, measuring tools, plastic moulds, guide rails.

 

PHYSICAL PROPERTIES

Thermal Conductivity at °C W / (m*K)
20 33.4
350 32.1
700 31.1

 

HEAT TREATMENT

Soft Annealing °C 750-780
Cooling Furnace
Hardness HB max. 230
Stress-relief Annealing °C approx. 650
Hardening °C 780-820
Quenching Air, Oil, Salt Bath 180-220°C
Hardness after quenching HRC 65