Flat steel M50C
M50C General cold work die steel with good machinability,to be made die casting mold,extrusion and injection mold and ejector pins,ejector sleeve,punches,block gauge,measuring tools.
High wear resistance,high toughness,small deformation caused by heat treatment.
Have a high and uniform hardness after heat treatment,heat resisting,resistance to high temperature oxidation,good toughness,machinability and weldability.
Annealing ≤HB255,pre-hardened HRC 40-46/HRC50-55.
Chemical Composition
Sort | Steel Grade | Chemical Composition,% | |||||||
C | Si | Mn | P | S | Cr | Ni | Mo | ||
Plastic Mold Steel | M50C | 0.47-0.53 | 0.17-0.37 | 0.5-0.8 | ≤0.03 | ≤0.03 | —— | —— | —— |
P20 | 0.36-0.42 | 0.2-0.8 | 0.6-1.2 | ≤0.025 | ≤0.015 | 1.4-2 | —— | 0.3-0.55 | |
P768R | 0.36-0.42 | 0.2-0.8 | 1-1.5 | ≤0.025 | ≤0.015 | 1.4-2 | 0.8-1.2 | 0.3-0.55 | |
P166R | 0.35-0.45 | ≤1 | ≤0.8 | ≤0.025 | ≤0.015 | 12-14 | —— | —— | |
Cold Work Steel | D2 | 1.4-1.6 | 0.1-0.6 | 0.1-0.6 | ≤0.03 | ≤0.03 | 11-13 | —— | 0.7-1.2 |
SKD11 | 1.4-1.6 | ≤0.4 | ≤0.6 | ≤0.03 | ≤0.03 | 11-13 | —— | 0.8-1.2 | |
O1 | 0.85-1 | 0.1-0.5 | 1-1.4 | ≤0.03 | ≤0.03 | 0.4-0.7 | —— | —— | |
Hot Work Steel | H13 | 0.32-0.45 | 0.8-1.25 | 0.2-0.6 | ≤0.03 | ≤0.03 | 4.75-5.5 | —— | 1.1-1.75 |
High Speed Tool Steel | M2 | 0.8-0.9 | 0.2-0.45 | 0.15-0.4 | ≤0.03 | ≤0.015 | 3.8-4.4 | —— | 4.5-5.5 |
V | W | Cu | Cu+Ni |
—— | —— | ≤0.3 | ≤0.55 |
—— | —— | ≤0.3 | ≤0.55 |
—— | —— | ≤0.3 | —— |
—— | —— | ≤0.3 | ≤0.55 |
0.5-1.1 | —— | —— | ≤0.75 |
0.2-0.5 | —— | ≤0.3 | ≤0.55 |
≤0.3 | 0.4-0.6 | —— | ≤0.75 |
0.8-1.2 | —— | —— | ≤0.75 |
1.75-2.2 | 5.5-6.75 | ≤0.3 | ≤0.55 |
Delivery Hardness
Steel Grade | Hardness HB(HRC) | |
Quenched and Tempered Condition | Annealed Condition(Normal ized) | |
M50C | —— | 200-245HB |
P20 | 285-330HB(30-36HRC) | ≤235HB |
P768R | 285-330HB(30-36HRC) | ≤235HB |
P166R | 285-330HB(30-36HRC) | ≤229HB |