Audited Supplier
round bar
Special Steel Bar
AISI, ASTM, DIN, JIS, GB, BS
Ferrous Steel Scrap
Forged
Bar
Polished
High-strength Steel Plate, Wear Resistant Steel, Free Cutting Steel, Mold Steel
Die Steel Bar
Smooth
Wooden or Bulk
6-400mm or (10-350)*(100-710)
China
7214100000
Product Description
1.2379/D2/SKD11
Brief DescriptionD2 Tool Steel is a versatile high-carbon, high-chromium, air-hardening tool steel that is characterized by a relatively high attainable hardness and numerous, large, chromium-rich alloy carbides in the microstructure. These carbides provide good resistance to wear from sliding contact with other metals and abrasive materials. Although other steels with improved toughness or improved wear resistance are available, D2 provides an effective combination of wear resistance and toughness, tool performance, price, and a wide variety of product forms.. The remelting process provides improved chemical homogeneity, refinement of carbide size, and the associated improvements in mechanical and fatigue properties.
1.Size Range for D2 Tool Steel
D2 Steel Round Bar: diameter 80mm~330mm
D2 Steel Plate: thickness 25mm~400mm x width 200mm~800mm
Delivery Condition:
Tured Round Bar,Milling Plate,Black,requiremts for customers.
Spheroidizing Annealing,ESR material.
2.D2 Tool Steel Equivalent Grades
| Country | USA | German | Japan | China | |
| Standard | ASTM A681 | W-nr. | DIN | JISG4404 | GB/T1299-2000 |
| Grades | D2 | 1.2379 | X155CrVMo121 | SKD11 | Cr12Mo1V1 |
| Grades | C% | Si% | Mn% | P% | S% | Cr% | Mo% | V% |
| D2 | 1.40~1.60 | 0.30~0.50 | 0.30~0.50 | ≤0.03 | ≤0.03 | 11.0~13. 0 | 0.70~1.20 | 0.80~1.10 |
| 1.2379/X155CrVMo121 | 1.50~1.60 | 0.10~0.40 | 0.15~0.45 | ≤0.03 | ≤0.03 | 11.0~12.0 | 0.60~0.80 | 0.90~1.10 |
| SKD11 | 1.40~1.60 | ≤0.40 | ≤0.60 | ≤0.030 | ≤0.030 | 11.0~13. 0 | 0.80~1.20 | 0.20~0.50 |
4.D2 Tool Steel Physical Properties
Physical properties of D2 Tool Steel are listed in the tables below.The elastic modulus is 207000MPa,and the specific heat at the constant pressure Cp is 461J/(kg·K).
Critical temperature of D2 Tool Steel
| Critical point | Ac1 | Acm | Arcm | Ar1 | Ms |
| Temp.(approximation) | 1490°F (810°C) | 1607°F (875°C) | 1382°F (750°C) | 1283°F (695°C) | 374°F (190°C) |
| Temperature | 68~212°F (20~100°C) | 68~392°F (20~200°C) | 68~572°F (20~300°C) | 68~752°F (20~400°C) |
| Coefficient | 10.5 x10-6 | 11.5 x10-6 | 11.9 x10-6 | 12.2 x10-6 |
| Items | Heating temperature | Starting forging temperature | Final forging temperature | Cooling |
| Ingot | 2048~2120°F (1120~1160°C) | 1922~1994°F (1050~1090°C) | ≥1562°F(850°C) | Hot charging annealing |
| billet | 2048~2084°F (1120~1140°C) | 1922~1958°F (1050~1070°C) | ≥1562°F(850°C) | Hot charging annealing,cooling in hole or dust |
Soft Annealing
Protect the steel and heat through to 1560°F (850°C). Then cool in the furnace at 20°F (10°C) per hour to 1200°F (650°C), then freely in air.
Stress relieving
After rough machining the tool should be heated through to 1200°F (650°C), holding time 2 hours. Cool slowly to 930°F (500°C), then freely in air.
Hardenging
Preheating temperature: 1110-1290°F (650-750°C). Austenitizing temperature: 1810-1920°F (990- 1050°C), but usually 1830-1905°F (1000-1040°C).
| Temperature | Soaking time (min) | Hardness before tempering | |
| °F | °C | ||
| 1815 | 990 | 60 | approx. 63 HRC |
| 1850 | 1010 | 45 | approx. 64 HRC |
| 1885 | 1030 | 30 | approx. 65 HRC |
Protect the part against decarburization and oxidation during hardening.
Quenching
Air or pressurized gas to 150-125ºF (66-51ºC). Sizes up to 4 inches (101.6 mm) in thickness will through harden when air cooled from 1575ºF (857ºC). Sizes up to 6 inches (152.4 mm) in thickness will through harden when air cooled from 1625ºF (885ºC).
Tempering
Temper immediately after quenching. Hold at temperature for 1 hour per inch (25.4 mm) of thickness, 2 hours minimum, then air cool to ambient temperature. The typical tempering range is 350 to 400ºF (177 to 204ºC).
For maximum wear resistance, temper between 300-350°F (149-177°C) for a hardness of 62-64 HRC. For the optimal balance between wear resistance and toughness, temper between 500-550°F (260-288°C). This will produce 58-60 HRC.
For maximum toughness, double temper, 2 hours plus 2 hours, at temperatures above 950°F (510°C). This will produce hardness of less than 58 HRC.
7.D2 Tool Steel Applications
Typical applications for D2 tool steel are blanking, forming, and trim dies, gages, slitting cutters, wear parts, lamination dies, thread rolling dies, drawing dies, rotary cutting dies, knurls, bending dies, gages, shear blades, burnishing tools, rolls, machine parts, master parts, injection screw and tip components, seaming rolls, extrusion dies, tire shredders, scrap choppers, etc.
We have been specializing in producing D2 Tool Steel for over ten years,in order to pursue higher quality standards,our D2 Tool Steels are all ESR products.D2 Tool Steel is our best-selling product,if you have any questions please contact us and we will do our best to help !
