1.2378, X220CrVMo12-2, Cold Work Tool Steel
1.2378 X220CrVMo12-2 Cold Work Tool Steel
1.2378 is Cold working steel. Ledeburitic chromium steel with high durability and cutting performance.
1.2738 High-Polish Pre-Hardened Mirror-Finish Plastic Mold Steel
Applications
A) Molds for injection molding and plastic compression molding
B) Molds for automotive bumpers, dashboards, TV cabinets, washing machine drums, etc.
Characteristics
A) Good weldability of pre-hardened blocks
B) Excellent hardness uniformity, cross-sectional hardness variation ≤1.5HRC
C) Superior machinability
D) High polishability
E) Working hardness 30-34HRC
1.2738 Extra-Large Cross-Section Pre-Hardened Plastic Mold Steel
Applications
– Injection and compression molding plastic molds
Automotive bumpers,
Automotive dashboards,
TV cabinets,
washing machine drum molds, etc
Characteristics
High Hardness Uniformity
– Cross-sectional hardness variation ≤2HRC
Extra-Large Cross-Section
– Maximum cross-section dimensions up to 1200mm x 1300mm
– Finished block unit weight up to 40 tons
Working Hardness
– 32-36HRC (controllable range)
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
Applications
Tools for cutting of dynamo and transformer sheet, measuring instruments, tools for processing
of plastics.
Equivalent
Mat.No.: 1.2378
DIN: X220CrVMo12-2
Chemical composition(mass fraction)(wt.%) of the 1.2378
| C(％) | Si(％) | Mn(％) | P(％) | S(％) | Cr(％) | Mo(％) | V(%) |
| 2.15-2.30 | 0.15-0.30 | 0.25-0.40 | Max 0.035 | Max 0.035 | 12.0-13.0 | 0.80-1.00 | 2.00-2.30 |
Smelting Option
1 EAF: Electric Arc Furnace
2 EAF+LF+VD: Refined-smelting and vacuum degassing
3 EAF+ESR: Electro Slag Remelting
4 EAF+PESR: protective atmosphere Electro Slag Remelting
5 VIM+PESR: Vacuum induction melting
Forming Option
1 Hot rolling process
2 Hot Forging: Electro-hydraulic; High-speed-hydraulic; Oil-hydraulic; Precision-forging
Heat-treatment Option
1 +A: Annealed (full/soft/spheroidizing)
2 +N: Normalized
3 +NT: Normalized and tempered
4 +QT: Quenched and tempered (water/oil)
Suface Option
1 Black Surface
2 Grounded: Bright but rough ; Not precision
3 Machining for plate: Bright and precision; Little turning scar
4 Peeled/Turned: Bright and precision; Little turning scar
5 Polished: Very Bright and precision size; Not turning scar
Other Services
1 Cutting: Small pieces
2 CNC Machine: Produce as your drawing
3 Package: Bare/Nylon/Canvas/Wooden
4 Payment:T/T, L/C, O/A(request credit)
5 Transport:FOB/CFR/CIF/DDU/DDP (train/ship/Air)
Physical properties (average values) at ambient temperature
Modulus of elasticity [103 x N/mm2]:210
Density [g/cm3]:7.63
Thermal conductivity [W/m.K]:20.0
Electric resistivity[Ohmmm2/m]:0.65
Specific heat capacity[J/g.K]:0.46
Soft Annealing
Heat to 820-850 C , cool slowly in furnace . This will produce a maximum Brinell hardness of 260 .
Stress Relieving
Stress relieving to remove machining stresses should be carried out by heating to 650 C, holding
for one hour at heat, followed by air cooling. This operation is performed to reduce distortion
during heat treatment .
Hardening
Harden from a temperature of 1070-1100 C followed by air quenching or warm bath quenching
350-450C. Hardness after quenching is 63-64 HRC.
Forging
Hot forming temperature: 1050-900°C.
Machinability
The machinability rating of 1.2378 is roughly 25 % that of free machining carbon steel 1018.
Due to its abrasion resistant nature, machining in the hardened condition should be limited to
finish grinding.
