Sleipner carbon steel

SLEIPNER is a chrome-molybdenum-vanadium alloy tool steel. It has numerous outstanding properties:
• Good wear resistance
• Good resistance to spalling
• High compressive strength
• High hardness (> 60 HRC) even when tempered at high temperatures.
• Good hardenability
• Good dimensional stability during hardening
• High tempering resistance
• Good spark machinability
• Good machinability and grindability
• Excellent for surface treatment

HEAT TREATMENT

SOFTENING

The steel is heated to a temperature of 850°C, protected from oxidation. It is then cooled in a furnace at a rate of 10°C/hour to 650°C.

Cooling is then carried out in open air.

STRESS RELIEF

After rough machining, the tool is

heated to 650°C and then held at this temperature for

2 hours. Then it is slowly cooled

to 500°C and then further in open air.

TEMPERING

Preheating temperature: 700°C and 850°C

Austenitizing temperature: 950–1080°C,

usually 1030–1050°C. Holding time: 30 minutes.

The piece must be protected from oxidation

decarbonization during heat treatment.

TEMPERING

The tempering temperature is selected from the tempering curve based on the desired hardness.

Two temperings are required,

with cooling to room temperature in between. The lowest tempering temperature that can be used is 180°C, and the minimum holding time is 2 hours.