NZ Clearance D2 Tool Steel (Bohler K110) 16.5x750mm Round Bar

Description

For sale in New Zealand Only!

This is K110 tool steel, Bohler’s equivalent of AISI D2 tool steel.

One round bar of steel 16.5x750mm approximate weight 1.25kg.

D2 is a wear resistant tool steel known for its excellent edge retention when used in knives. D2’s high chromium content also gives it good stain/rust resistance, which can be enhanced with the right heat treatment.

Nominal composition:

Carbon: 1.55%

Chromium: 11.3%

Vanadium: 0.75%

Molybdenum: 0.75%

Manganese: 0.30%

Silicon: 0.30%

Recommended heat treatment for D2 for use in fine cutting tools and to maximise stain resistance:

*Seal blade in double crimped high temperature stainless steel tool wrap

*Preheat to 850°C, hold for 5 minutes

*Austenitise at 1030°C for 30-60 minutes

*Plate quench

*Cold treatment; liquid nitrogen, dry ice slurry, domestic freezer – the colder the better

*Temper at 225-275°C for 2 hours, three times

*Alternatively, if not using cold treatment, temper at 540°C for 2 hours, three times, to take advantage of secondary hardening and improved dimensional stability when used in higher temperature tool applications

Recommended working hardness 58-61HRC