DC53 Round Bar

DC53 is a high-strength, high-toughness, general-purpose cold-work die steel developed by Daido Steel (Japan). It was specifically engineered to improve upon and replace the traditional SKD11 (D2) steel.

1. Core Characteristics

• High Hardness and Toughness: It overcomes the weaknesses of SKD11 regarding insufficient hardness and toughness after high-temperature tempering. It can achieve a tempered hardness of 62-64 HRC, with toughness approximately twice that of SKD11.

• Excellent Wear Resistance: The uniform distribution of fine carbides significantly improves resistance to chipping and cracking, offering a service life far exceeding that of D2 steel.

• Superior Machinability: Its machinability and grindability are approximately 20%–40% higher than those of SKD11/D2, effectively extending the lifespan of machining tools.

• Heat Treatment Stability: It exhibits minimal quenching distortion, and residual stress after high-temperature tempering is extremely low, making it ideal for Wire Electrical Discharge Machining (Wire EDM).

2. Heat Treatment Specifications

• Quenching: Typically performed at 1030–1050°C with air or oil cooling.

• Tempering:

◦ Low-Temperature Tempering (180–200°C): Used for achieving maximum strength.

◦ High-Temperature Tempering (520–530°C): Used to obtain maximum hardness (62-63 HRC) and significantly enhanced toughness; recommended for Wire EDM dies.

• Annealed Hardness: Approximately 210–255 HBW.

3. Typical Applications

DC53 plate is widely used in fields requiring extreme toughness and wear resistance:

• Stamping Dies: Precision blanking dies, cold forging dies, deep drawing dies, and thread rolling dies.

• Cutting Tools: Slitting knives, rollers, and various types of punches.

• Specialized Molds: High-hardness plastic molds, complex precision molds, and forming tools for difficult-to-machine materials.