Forged Cold Work Tool Steel Plate

• Type: Special Steel Bar
• Standard: AISI, ASTM, DIN, JIS, GB, BS
• Composition: Stainless Steel Scrap
• Technique: Forged
• Shape: Bar
• Surface Treatment: Polished
• Model NO.: round bar
• Special Use: High-strength Steel Plate, Wear Resistant Steel, Free Cutting Steel, Mold Steel
• Application: Die Steel Bar
• Transport Package: Wooden
• Specification: 6-400mm
• Trademark: Smooth
• Origin: China
• HS Code: 7214100000
• Production Capacity: 5000

Product Description

1.2379/D2/SKD11

Brief Description
D2 Tool SteelD2 Tool Steel is a remarkably versatile high-carbon, high-chromium, air-hardening tool steel renowned for its relatively high attainable hardness. It boasts numerous, large, chromium-rich alloy carbides within its microstructure, providing excellent resistance to wear from sliding contact with other metals and abrasive materials. While there are steels with enhanced toughness or wear resistance, D2 balances wear resistance, toughness, tool performance, price, and availability in various product forms. The remelting process enhances chemical homogeneity, refines carbide size, and delivers associated improvements in mechanical and fatigue properties.
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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:
Turned Round Bar, Milling Plate, Black, customized to customer requirements.
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

3. D2 Tool Steel Chemical Composition

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
The physical properties of D2 Tool Steel are detailed in the tables below. The elastic modulus stands at 207000 MPa, and the specific heat at constant pressure (Cp) is 461 J/(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)

Coefficient of Linear Thermal Expansion

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

5. Forging of D2 Tool Steel

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

6. Heat Treatment
Soft Annealing
Protect the steel and heat it through to 1560°F (850°C). Then, cool in the furnace at 20°F (10°C) per hour down to 1200°F (650°C), then allow it to cool freely in air.
Stress Relieving
After rough machining, heat the tool through to 1200°F (650°C), holding for 2 hours. Cool slowly to 930°F (500°C), then allow it to cool freely in air.
Hardening
Preheating Temperature: 1110-1290°F (650-750°C). Austenitizing Temperature: 1810-1920°F (990-1050°C), typically 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

* Soaking time = Time at the hardening temperature after the tool is fully heated through.
Protect the part against decarburization and oxidation during hardening.
Quenching
Use air or pressurized gas to cool 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).
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Tempering
Temper immediately after quenching. Maintain temperature for 1 hour per inch (25.4 mm) of thickness, with a minimum of 2 hours, then air-cool to ambient temperature. The typical tempering range is 350 to 400ºF (177 to 204ºC).
For unparalleled wear resistance, temper between 300-350°F (149-177°C) to achieve a hardness range of 62-64 HRC. To attain an optimal balance between wear resistance and toughness, temper between 500-550°F (260-288°C), resulting in a hardness range of 58-60 HRC.
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For exceptional toughness, perform a double temper for 2 hours plus an additional 2 hours at temperatures exceeding 950°F (510°C). This procedure yields a hardness of less than 58 HRC.
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7. D2 Tool Steel Applications
D2 tool steel is ideal for a multitude of applications, including 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, and more.

With over a decade of expertise in producing D2 Tool Steel, we are committed to achieving the highest quality standards. Our D2 Tool Steels are exclusively ESR products, making them our best-selling option. Should you have any questions, please do not hesitate to contact us; we are here to assist you in every way possible!