| Customization: | Available |
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| Type: | Alloy Steel Bar |
| Standard: | AISI, ASTM, DIN, JIS, GB, BS |
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1: AISI D3 steel introduction
AISI D3 cold work steel, also know as DIN 1.2080 (Werkstoff) and JIS SKD1, is a 12% chrome alloy steel. D3 cold work steelhas very high wear resistance against abrasive and adhesive wear due to the high volume of hard carbides in the steel matrix, medium toughness, dimensionally stable, high compressive strength, not secondary hardenable. Type AISI D3 cold works tool steel is oil-quenched; though small sections can be gas quenched after austenitization using vacuum. As a result, tools made with type D3 cold work tool steel tend to be brittle during hardening.
2: AISI D3 Steel equivalent
| Country | China | Japan | Germany | USA | UK |
| Standard | GB/T 1299 | JIS G4404 | DIN EN ISO4957 | ASTM A681 | BS 4659 |
| Grade | Cr12 | SKD1 | 1.2080/X210Cr12 | D3 |
| Grade | C | Mn | P | S | Si | Cr | V | T | Mo | |||||||
| D3 | 2.00 | 2.35 | 0.10 | 0.60 | 0.03 | 0.03 | 0.10 | 0.60 | 11.00 | 13.50 | . . . | 1.10 | . . . | 1.00 | . . . | . . . |
| 1.2080/X210Cr12 | 1.90 | 2.20 | 0.20 | 0.60 | 0.10 | 0.60 | 11.00 | 13.00 | - | - | - | - | - | - | ||
| SKD1 | 1.90 | 2.20 | 0.20 | 0.60 | 0.03 | 0.03 | 0.10 | 0.60 | 11.00 | 13.00 | - | - | - | - | - | - |
5: AISI D3 steel overviews
| Size | Round | Dia 6-1200mm |
| Plate/Flat/Block | Thickness 6mm-500mm |
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| Width 20mm-1000mm |
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| Process | EAF+LF+VD+Forged+Heat treatment(optional) | |
| Heat treatment | Normalized ; Annealed ; Quenched ; Tempered | |
| Surface condition | Black; Peeled; Polished; Machined; Grinded; Turned; Milled | |
| Delivery condition | Forged; Hot rolled; Cold drawn | |
| Test | Tensile strength, Yield strength, elongation, area of reduction, impact value, hardness, grain size, ultrasonic test, US inspection, magnetic particle testing, etc. | |
| Payment terms | T/T;L/C;/Money gram/ Paypal | |
| Trade terms | FOB; CIF; C&F; etc.. | |
| Packing | Standard Packages, or as Customers Request | |
| Delivery time | 30-45 days | |
| Application | D3 is suitable for applications such as complex blanking and forming tools for long runs and for hard and abrasive materials. | |
7.Heat treatment
Isothermal annealing:
- Heat to 800°Cand hold at temperature for 1/2 h to 1 h;
- Furnace cooling to 670°Cand hold at temperature for at least 10 hours;
- Cool by 10°C/h to 630°C;
- Cooling in air.
Maximum hardness:≤240 HB
Stress relieving:
To be carried out after maching before the final heat treatment.
- Heat to 600-650°C, hold for 4-6 hours;
- Cooling in furnace to 300-350°C;
- Cooling in air
Hardening:
- Initial preheating to 350-450°C;
- Second preheating to 650-750°C;
- Heat to hardening temperature 860-890°Cand hold at temperature;
- Cooling in hot oil (40-60°C); oil quenched hardness: 54-59HRC;
Tempering:
Tempering must be carried out within one hour from hardening(warm part) in the range 550-630°Cfor 4-6 hours according to hardness required, the dimensions of the parts and operating conditions.
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