50NiCr13, 1.2721 - cold-working tool steel according to EN ISO 4957
Table of content:
| Standard | Steel Grade | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chemical Composition % | |||||||||||||||
| C: | Si: | Mn: | P: | S: | Cr: | Ni: | Mo: | V: | Ti: | Al: | B: | ||||
| DIN | 50NiCr13 / 1.2721 | ||||||||||||||
| 0,45-0,55 | 0,15-0,35 | 0,4-0,6 | <0,035 | <0,035 | 0,9-1,2 | 3,0-3,5 | - | - | - | - | - | ||||
| SS | 2550 | ||||||||||||||
| 0,52-0,60 | 0,2-0,4 | 0,3-0,5 | <0,03 | <0,02 | 0,9-1,1 | 2,8-3,2 | 0,25-0,35 | - | - | - | - | ||||
| GOST | 78ChN3FTR - 78ХН3ФТР | ||||||||||||||
| 0,73-0,81 | 0,15-0,25 | 0,25-0,50 | <0,025 | <0,02 | 0,9-1,2 | 2,7-3,2 | 0,2-0,3 | 0,10-0,18 | 0,05-0,08 | 0,01-0,04 | 0,001-0,003 | ||||
50NiCr13, 1.2721 – description
Cold working tool steel used for cold heading dies, hobbing punches and cutlery dies.
Physical and mechanical properties
The hardness after soft annealing: min 250 HBW.
The hardness after toughening depends on the tempering temperature:
- Tempering temperature: 100 °C - 59 HRC
- Tempering temperature: 200 °C - 56 HRC
- Tempering temperature: 300 °C - 52 HRC
- Tempering temperature: 400 °C - 48 HRC
Heat treatment and working
Recommended working and heat treatment parameters for 1.2721 alloy:
- Forging: 1050-850 °C
- Rolling: 1050-850 °C
- Stress-relieving: 610-650 °C
- Quenching: 840-870 °C
- Tempering: 160-300 °C
We deliver this steel alloy as:
- Round Bars, flat and square bars
- Forgings and forged blocks
Replacements, equivalents and other designations:
50NiCr13, 78ChN3FTR, 78ХН3ФТР, SS2550, 1.2721, UHB GRANE, Thyrodur 2721