1.2162 21MnCr5 20ХГ Cold Work Tool Steel
1.2162 21MnCr5 20ХГ Cold Work Tool Steel
Grade : 21MnCr5 Number: 1.2162
Classification
Alloy cold-work tool steel
Standard:
EN ISO 4957: 2000 Tool steels
Characteristics
Manganese-chrome steel for case-hardening with the middle hardenability, with the hardness of case-hardened layer and with the high hardness in the core. Further the steel is characterized by a good ductility at the heat, good workability in the annealed state and it is easy to polish.
We can provide more services:
1、Hardening and tempering
2、Vacuum heat treatment
3、Polished bright surface
4、Milling bright surface
5、CNC machine
6、Deep drilling
7、Cut into small pieces
8、Make it closer to the mold
Welcome to inquiry price from drawing
APPLICATION:
machine parts and moulding plates with a high surface hardness;
synthetic resin press moulds for the processing of thermoplastics and thermosetting plastics.
Suitability
For small and middle-size cemented molds for mechanical working of plastic materials and rubber with the demand on higher hardness in the core.
Chemical composition%of the ladle analysis of grade 1.2162
C(％) Si(％) Mn(％) P(％) S(％) Cr(％)
0.18-0.24 0.15-0.35 1.10-1.40 Max 0.030 Max 0.030 1.00-1.30
Product range
Round bars: D10 – D615
Blocks: 510×1010
Metal sheets: s.5 – s.150
We will deliver any semi-finished products from the above mentioned dimensions. Other dimensions, except for given stock supplies, have to be consulted with us.
HEAT TREATMENT:
Soft annealing:
670 to 710 °C for about 2 to 5 hours
slow controlled cooling, further cooling in air, max. 205 HB
Carburising:
900 to 950 °C. The choice of the carburising means and carburising temperature depends on the desired surface carbon content, the carburising graph and the required case depth.
Application:
870 to 930 °C in powder/salt bath, cooling in oil/warm bath at 160 to 250 °C
Intermediate stress-relieving heat treatment:
630 to 650 °C, about 2 to 4 hours with slow furnace cooling
Preheating:
350 °C depending on dimensions
Hardening:
curing temperature 810 to 840 °C in oil of ~ 60 °C warmth
Cooling:
down to about 100 °C in oil, then in air to about 50 °C
Tempering:
1 hour per 20 mm part thickness, at least 2 hours
