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Steel Heat Treatment Guide

1.2842 steel has high dimensional stability, cracking resistance, machinability, wear resistance, and toughness. It is suitable for measuring tools, machine knives, cold cutting shear blades, and thread cutting tools. 2. The steel has a carbon content of 0.9% and contains manganese, chromium, and vanadium. It exhibits a hardness of up to 229 HB after soft annealing and 63-65 HRC after hardening and quenching. 3. Heat treatment involves soft annealing at 690-720°C, hardening from 790-820°C followed by quenching in oil or salt baths at 180-220°C, and tempering from 100-

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60 views1 page

Steel Heat Treatment Guide

1.2842 steel has high dimensional stability, cracking resistance, machinability, wear resistance, and toughness. It is suitable for measuring tools, machine knives, cold cutting shear blades, and thread cutting tools. 2. The steel has a carbon content of 0.9% and contains manganese, chromium, and vanadium. It exhibits a hardness of up to 229 HB after soft annealing and 63-65 HRC after hardening and quenching. 3. Heat treatment involves soft annealing at 690-720°C, hardening from 790-820°C followed by quenching in oil or salt baths at 180-220°C, and tempering from 100-

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pedja
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SIHARD 2842

MERILO
DIN - Material - No. 1.2842
Code 90MnCrV8
Comparable standards AISI: O2, EU: 90MnV8
Chemical composition C Si Mn Cr V
(Typical analysis %) 0.90 0.25 2.00 0.35 0.10
Steel properties High dimensional stability at heat treatment. Very high
resistance to cracking. High machinability, wear resistant and
toughness. Good cutting edge retention.

Physical properties Thermal conductivity W/(m.K) 20oC


30
3
Density g/cm 20oC
7.85
Coefficient of linear thermal expansion
20-100 20-200 20-300 20-400 20-500 20-600 20-700oC
10-6 oC-1 12.1 13.3 13.8 14.3 14.1 14.2 14.6

Applications Measuring tools, machine knives for the wood, paper and metal
industry, cold cutting shear blades, thread cutting tools.

Stress Relieving Holding at approx 6500C for one hour.

Heat treatment Soft annealingoC Cooling Hardness HB


690 - 720 furnace max. 229
Hardening fromoC in Hardness after quenching HRC
790 - 820 oil, thermal bath 63 - 65
180 - 220oC
o
Tempering C 100 200 300 400 500 600
HRC 63 60 56 50 42 38

Time - Temperature - Transformation - Diagram Tempering Diagram

USBCO STEELS PVT LTD

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