SKD11 Cr12MoV Cold-work Tool Steel Bars and Plates
This is a high-carbon, high-chromium cold-work die steel belonging to the martensitic class. It exhibits excellent hardenability, allowing large-section dies to be uniformly hardened. It also boasts ultra-high hardness and wear resistance, with minimal dimensional changes during quenching. Compared to Cr12 steel, it features a more uniform carbide distribution and higher toughness.
Applications of SKD11
This grade delivers exceptional wear resistance and compressive strength, with stable dimensional accuracy under heavy loads. It is mainly applied to cold forming tooling, covering precision blanking dies and cold extrusion dies for electronic components, bearing races and fasteners.
- Cold working die: It is widely used for manufacturing all kinds of cold working dies such as cold punching dies, cold heading dies and cold extrusion dies. Among these dies, the high hardness, high strength and good wear resistance of Cr12MoV steel can ensure the service life and machining accuracy of these dies.
- Measuring and cutting tool: It can be used to manufacture all kinds of measuring and cutting tools, such as calipers, micrometers and cutting tools, etc. Its high hardness and good wear resistance can ensure the measurement accuracy and cutting performance of measuring and cutting tools.
- Wear-resistant parts: Because of its excellent wear resistance, it can also be used to manufacture all kinds of wear-resistant parts, such as guide pillars, guide sleeves and sliding blocks, etc. These parts need to withstand friction and wear during operation, and Cr12MoV steel can meet their usage requirements.
Equivalent Grades and Commonly Used Specifications of SKD11
| Steel Grade | Specification | Specification Name |
| Cr12MoV / T21319 | GB/T 1299 | Tool and Mould Steels |
| SKD11 | JIS G 4404 | Alloy tool steels |
| Products produced as per other specifications or technical agreements (if need) are available. | ||
Typical Chemical Composition of SKD11
|
Elements |
C | Si | Mn | P | S | Cr | Mo | V |
| Contents% | 1.45~1.70 | ≤0.40 | ≤0.40 | ≤0.030 | ≤0.020 | 11.00~12.50 | 0.40~0.60 |
0.15~0.30 |
| Products produced as per other specifications or technical agreements (if need) are available. | ||||||||
Typical Heat Treatment Condition and Mechanical Properties of SKD11
|
Delivery Condition |
Mechanical Properties and Hardness of Heat-Treated Specimens | ||||||
| Rp0.2/(N/mm2) | Rm/(N/mm2) | A/% | Zb/% | Aku2d/J | HBW |
HRC |
|
|
Annealed Condition |
/ | / | / | / | / | 207~255 | / |
| Quenched（950℃-1000℃, oil） | / | / | / | / | / | / |
≥58 |
Process Properties
It has good hot forging performance, and can improve the internal structure of steels and enhance its mechanical properties by forging process. The forging temperature range is generally 1050-1100℃.
It has good machinability, and can be used to manufacture various shapes of parts by machining. However, because of its high hardness, hard alloy cutting tools are required for cutting operations.
Quenching and Tempering Process
of Cr12MoV Steel
Isothermal Transformation Diagram of Undercooled
Austenite of Cr12MoV Steel
Effect of Quenching Temperature on Hardness and
Residual Austenite Content of Cr12MoV
Effect of Tempering Temperature on Hardness and
Residual Austenite Content of Cr12MoV Steel (1130℃)
Product Forms and Size Range of SKD11
|
Product forms |
Size range |
|
Bars |
Diameter or side length: 5.0mm~1000mm |
| Flats |
thickness: 4.0mm~1000mm width: 300mm~2200mm |
| Produce as other form and size according to technical requirements are available. | |
