Common Die Steel Model

The material selection of the mold is good or not, which directly affects the manufacturing cycle of the product, that is, the number of mold openings, and also affects the surface treatment process of the product. Some materials cannot be treated with specular highlights, while others have weak strength and are not suitable for insertion.

Therefore, the choice of mold materials is also related to the entire development cycle and quality of product design.

Steel Codes of Countries

1. American Standard AISI

　　Code:

　　P1-P19：LowCarbon Steel

　　P20-P39：Low Carbon, High Alloy Steel(塑胶模钢)

2XX,3XX,4XX,6XX:Stainless Steel (Stainless Steel)

H1-H19:Chromium base (chrome base-hot work steel)

　　Wx：Water Hardening Steel

　　Sx：Shock Resisting Steel

　　Ox：OilHardening Steel (油钢)

　　Ax：AirHardening Steel

　　Dx：High Carbon, High Chromium Steel(铬钢)

　　Mx：Molybdenum base (H.S.S.-高速钢)

2. German standard DIN

　　Code:

1.2738:Low carbon, high alloy (P20-Plastic Die Steel)

1.2311:Lowcarbon, high alloy (P20-plastic mold steel)

　　1.2312：Lowcarbon, high alloy, free Machine (P20-易切削)

1.2083:StainlessSteel (420-acid-resistant steel)

　　1.2316：Highperformance stainless Steel (420 - 高抗酸钢)

1.2343:Chromiumbase (chromium base-H11-hot work steel)

1.2344:Chromiumbase (chromium base-H13-hot work steel)

　　1.2510：Lowalloy steel (O1-油钢)

　　1.2379：Highcarbon, high chromium steel (D2 –铬钢)

3. Japanese Standard JIS

　　Code:

SxxC:Plain Carbon steel (yellow card-S55C)

　　SUSxx：Stainless Steel (抗酸钢- 420)

　　SCrx：Chromium Steel

SCMx:Chromium Molybdenum Steel(P20)

　　SKx：Carbon Tool Steel

　　SKSx：Low Alloy Steel (油钢 - O1)

　　SKD11：MediumHigh Alloy Steel(铬钢- D2)

SKD6:Medium High Alloy Steel-H11

SKD61:Medium High Alloy Steel-H13

　　SKHxx：High Speed Steel (高速钢- M 2)

　　SUMx：Free Cutting Steel (易切削钢)

　　SUJx：Bearing Steel

Mold steel performance classification

Die steel can be roughly divided into three categories, namely: cold die steel, hot die steel and plastic die steel. The commonly used die steel materials are mainly these three types of die steel.

A, cold work die steel

Cold work die steel is mainly used to manufacture a mold for pressing a workpiece in a cold state. Such as: cold blanking mold, cold stamping mold, cold drawing deep mold, stamping mold, cold extrusion mold, thread pressing mold and powder pressing mold. The range of cold work die steel is very wide,. From various carbon tool steels, alloy tool steels, high-speed tool steels to powder high-speed tool steels and powder high-alloy die steels. Cold working die steel is vacuum degassing refining steel, pure internal quality, good machinability, cutting significantly improved, good hardenability, air-cooled hardening is not easy to appear quenching crack, excellent wear resistance, good toughness, can be used as stainless steel and high hardness materials of the blanking die.

1. Wear-resistant cold work die steel

　　6Cr4W3MoVNb、6W6Mo5Cr4V、7Cr7Mo3V2Si、Cr4W2MoV、Cr5Mo1V、Cr6WV、Cr12、Cr12MoV、Cr12W、Cr12Mo1V1。

2. Impact resistant cold work die steel

　　4CrW2Si、5CrW2Si、6CrW2Si。

3. High carbon low alloy cold work die steel

　　9SiCr、9CrWMn、CrWMn、Cr2、9Cr2Mo、7CrSiMnMoV、8Cr2MnWMoVS、Cr2Mn2SiWMoV。

4. Steel for non-magnetic mould

　　7Mn15Cr2Ae3V2WMo、1Cr18Ni9Ti。

5. High speed steel for cold working die

　　W6Mo5Cr4V2、W12Mo3Cr4V3N、W18Cr4V、W9Mo3Cr4V。

6. Cold work die carbon tool steel

　　T7、T8、T9、T10、T11、T12。

B, hot work die steel

Hot work die steel is mainly used in the manufacture of high temperature state of the workpiece for pressure processing of the mold. Such as: hot forging die, hot extrusion die, die-casting die, hot upsetting forging die. Commonly used hot work die steels are: alloy die steels with medium and high carbon content adding Cr, W, Mo, V and other alloying elements; For hot work die steels with special requirements, high alloy austenitic heat-resistant die steels are sometimes used.

1. Low heat resistance hot work die steel

　　5CrMnMo、5CrNiMoVSi、4CrMnSiMoV、5Cr2NiMoVSi。

2. Medium heat resistance hot work die steel

　　4Cr5MoSiV、4Cr5MoSiV1、4Cr5W2VSi、8Cr3。

3. High heat resistance hot work die steel

　　3Cr2W8V、3Cr3Mo3W2V、5Cr4Mo4W2VSi、5Cr4Mo3SiMnVAe、5Cr4W5Mo2V、6Cr4Mo3Ni2W。

C, plastic mould steel

Because there are many varieties of plastics, the requirements for plastic products are also very different, and various performance requirements are also put forward for the materials used to make plastic molds. Therefore, many industrially developed countries have formed a wide range of plastic mold steel series. Including carbon structural steel, carburizing plastic mold steel, pre-hardened plastic mold steel, age hardening plastic mold steel, corrosion-resistant plastic mold steel, easy-to-cut plastic mold steel, overall hardened plastic mold steel, maraging steel and mirror polishing plastic mold steel.

1. Carburized plastic mold steel

　　20Cr、12CrNi3A。

2. Age hardening plastic mould steel

　　3Cr2Mo、3Cr2NiMnMo、5CrNiMnMoVSCa、40Cr、42CrMo、30CrMnSiNi2A。

3. Carbon plastic mould steel

　　SM45、SM50、SM55。

4. Corrosion resistant plastic mould steel

　　2Cr13、4Cr13、9Cr18、9Cr18Mo、Cr14Mo4V、1Cr17Ni2。