Cold Work Mold Steel

Name: China Cold Work Mold Steel Manufacturers Suppliers - Cold Work Mold Steel Made in China
Brand: Promisteel
SKU: 293295090

NAME: Cold Work Mold Steel
BRAND: PROMISTEEL
GRADES: D2, D3, Cr12MoV, SKD11, 1.2379, O1
SHAPES: Round Bar, Flat Bar, Plate, Block
DELIVERY CONDITION: EAF+LF+VD, Forged/Hot Rolled, Annealed, Machined
SURFACE: Black, Peeled, Milled, Grinded
HARDNESS: Annealed ≤255 HB; Quenched ≥58-62 HRC
APPLICATION: Stamping Dies, Punches, Shear Blades, Thread Rolling Dies
MOQ: 25 Tons

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Product Introduction

Cold Work Mold Steel is the backbone of the metal stamping and forming industry. Designed to operate at room temperature, these steels are engineered to withstand high stress, heavy impact, and abrasive wear during the deformation of metals.

Our Cold Work Steels, led by the industry-standard D2 (1.2379) and the cost-effective Cr12MoV, feature high carbon and high chromium content. Through precise heat treatment, they achieve a high hardness (typically 58-62 HRC) and a microstructure rich in hard carbides. This makes them the ideal material for manufacturing long-life blanking dies, punches, and shear blades.

Product Specifications & Grade Equivalents

We supply a wide range of Cold Work Steels, from general-purpose grades to high-performance high-chromium alloys.

Table-1

Find the exact grade equivalent for your tooling needs.

International Grade Comparison
GB (China)	ASTM / AISI (USA)	DIN (Germany)	JIS (Japan)	Type
Cr12Mo1V1	D2	1.2379 (X153CrMoV12)	SKD11	High Wear/High Carbon
Cr12	D3	1.2080 (X210Cr12)	SKD1	High Wear / Low Toughness
Cr12MoV	-	-	SKD11 (Similar)	Cost-Effective D2 Alternative
9Mn2V	O2	1.2842	SKS3	Oil Hardening
9SiCr	-	-	SKS2	Cutting & Measuring

Table-2

Precise control of Carbon and Chromium for optimal carbide formation.

Chemical Composition (Mass Fraction %)
Grade	C	Si	Mn	Cr	Mo	V
D2 / 1.2379	1.45~1.60	0.10~0.60	0.20~0.60	11.00~13.00	0.70~1.20	0.70~1.00
D3 / 1.2080	2.00~2.30	0.10~0.60	0.20~0.60	11.00~13.50	-	-
Cr12MoV	1.45~1.70	≤0.40	≤0.40	11.00~12.50	0.40~0.60	0.15~0.30
O1 / 1.2510	0.90~1.05	≤0.50	1.00~1.40	0.40~0.70	-	0.05~0.25

Table-3

Custom cutting services are available for blocks and plates.

Supply Range & Size Specifications
Product Form	Thickness/Diameter (mm)	Width (mm)	Length (mm)	Surface Finish
Round Bar	Φ 10 - 600 mm	-	3000 - 6000	Black / Peeled / Turned
Flat Bar	10 - 300 mm	40 - 1000	2000 - 5800	Black / Machined
Steel Plate	10 - 400 mm	200 - 2300	2000 - 5800	Hot Rolled / Milled
Steel Block	Custom Cut	Custom Cut	Custom Cut	6-Sides Sawn/Milled

Key Features and Advantages

Exceptional Wear Resistance: The high volume of chromium carbides in D2 and Cr12 grades protects the tool surface from sliding wear and abrasion.
High Compressive Strength: Designed to withstand heavy stamping loads without deforming or collapsing.
Deep Hardenability: Alloying elements ensure uniform hardness from the surface to the core, even in large cross-sections.
Dimensional Stability: Low deformation during heat treatment ensures that precision dies maintain their tolerances after quenching.
Machinability: Despite their hardness, our spheroidizing annealed condition ensures the steel is soft enough for complex machining before heat treatment.

Typical Applications

Cold Work Mold Steel is versatile and used wherever metal needs to be cut, bent, or formed:

Blanking & Punching Dies

For processing stainless steel sheets, silicon steel sheets, and high-strength automotive panels.

Thread Rolling Dies

High-wear tools used to form threads on screws and bolts.

Shear Blades

Industrial knives for cutting sheet metal (slitting lines).

Drawing & Forming Dies

Used in deep drawing processes for cans, cups, and automotive structural parts.

Cold Heading Dies

For producing nuts, bolts, and fasteners.

FAQ

Q1: What is the difference between D2 and Cr12MoV?

A1: Cr12MoV is widely considered the "Chinese equivalent" to D2, but there are differences. D2 (ASTM) typically has higher Molybdenum (Mo) and Vanadium (V) content than Cr12MoV. This gives D2 slightly better hardenability and wear resistance. However, Cr12MoV is more cost-effective and performs excellently for most standard stamping applications.

Q2: Which grade is best for stamping Stainless Steel?

A2: Stamping stainless steel is abrasive and generates heat. D2 (1.2379) or SKD11 is recommended due to its superior wear resistance. For even higher performance, specialized powder metallurgy steels or high-speed steels might be considered.

Q3: How hard can Cold Work Mold Steel get?

A3: Most cold work steels like D2 and Cr12MoV are typically used in the hardness range of 58-62 HRC. Going higher (e.g., >64 HRC) risks brittleness, while going lower reduces wear resistance.

Q4: Do you offer machining services?

A4: Yes. We can supply materials as Pre-machined (milled/ground) to your target dimensions, saving you processing time. We also offer standard "Milled Plates" ready for die sets.

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