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Introduction
DC-53 is a general purpose cold work tool steel with exceptional Toughness, Wear Resistance, Compressive Strength and Temper Resistance. DC53, is an improvement over alloy tool steel D-2. It eliminates the disadvantages of insufficient hardness and toughness.
Smelting method : EAF+LF+VD+ESR
Main Characteristics : Relatively high tenacity, high abrasion performance, little heat treatment dimension deformation, improved coarse carbides and excellent processing performance.
Major Applications : Mainly used for precision cold pressure molds: precision punching and cutting of line cutting processing, stamping dies of various applications, etc.
Long-life automobile covered piece molds: inlaid molds of key parts.
Cut-off dies, edge rolling dies, wire drawing dies and screw dies.
Chemical Composition : (%)
| C | Si | Mn | Cr |
| 0.90-1.05 | 0.80-1.10 | 1.10-0.45 | 7.50-8.50 |
| Mo | V | W | P | S |
| 1.80-2.10 | 0.20-0.35 | - | ≤ 0.025 | ≤ 0.020 |
Physical Property : (%)
| Room temperature density (kg/m³) | Specific heat of room temperature (J/Kg.K) | 200°C thermal conductivity (W/m.K) |
| 7.85 | 0.45 | 20.5 |
| Elastic mouldsus (N/nm²) | Linear Expensivity (x10-6K) 20 ~ 200°C
20 ~ 400°C
|
| 218,000 |
11.9
12.3
|
Ultrasonic flaw detection :
Electric furnace steel: flaw detection standard: as per SEP1921 - D/d flaw detection or GB/T4162 Class B, or as per customer requirements.
Electroslag steel: flaw detection standard: as per SEP1921 - E/e flaw detection or GB/T4162 Class A, or as per customer requirements.
Purity :
Electric furnace steel :
| Class A | Class B | ||
| Fine | Coarse | Fine | Coarse |
| 1.5 | 1.0 | 2.0 | 1.5 |
| Class C | Class D | ||
| Fine | Coarse | Fine | Coarse |
| 1.5 | 1.0 | 1.5 | 1.5 |
Electroslag steel :
| Class A | Class B | ||
| Fine | Coarse | Fine | Coarse |
| 1.0 | 0.5 | 1.5 | 1.0 |
| Class C | Class D | ||
| Fine | Coarse | Fine | Coarse |
| 1.0 | 1.0 | 1.5 | 1.0 |
Delivery State :
(1) Delivery hardness: delivery under annealing state, ≤255HB;
(2) Unevenness of eutectic carbide shall comply with Bole criteria;
Supply Specifications :
| Round Steel | Flat Steel | Module |
| Φ 1~310mm | 12~120 x 200~600mm | 120~150 x 300~600mm |
Thermal Treatment :
| Softening annealing | Quenching |
| Heating to 850°C for heat insulation; cooling to 650°C at 10°C C/h air cooling. | 1,030~1,050 quenching gas cooling and oil cooling (simple shape) |
| Tempering |
| Low temperature tempering; 180~200, tempering for twice High temperature tempering: 500~550, tempering for twice. |
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