- Soft-annealing 850°C – 900°C / 1560°F – 1650°F, slow
cooling 10°C / 18°F/h to 700°C / 1290°F, hardness max 270
Brinell.
- Stress relieving 600°C – 700°C / 1120°F – 1290°F,
approx. 2 hours at temperature, slow cooling to 500°C / 930°F.
- Hardening with preheating in two steps 450°C – 500°C / 840°F –
930°F,
850°C – 900°C / 1560°F – 1650°F and austenitizing at
1050°C – 1190°C / 1920°F – 2175°F. Quenching to about
550°C / 1022°F then cool in air to hand warm
- Tempering at 560°C / 1040°F or higher 3 times for at least 1
hour at full temperature is recommended.
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