classification

Material

Japan

Japan Standard

America Standard

Germany Standard

DAIDO

JIS

AISI

Buderus

Medium Carbon

Steel

S45C

S45C

S45C

1045

CK45

S50C

S50C

S50C

1050

CK50

High Carbon

Steel

SUJ2

-

SUJ2

52100

3505

Plastic Injection Mold

Steel

P1

PDS-1

S55C  series

1055

-

P3

PDS-3

SCM445 series

4140

7225 MOD

P20

PDS-5

-

P-20

2311 ISO-BM

P20+Ni

-

-

P20+Ni

2738 ISO-BM

NAK80

NAK80

-

P21

2711 ISO-BM

-

SUS420

-

SUS420

420F

4028

STAVAX

S-SATR

SUS420J2mod

420mod

2083 ISO-BM

RAMAX

PD742

420-H

420m

2316 ISO-BM MOD

Cold-Work Mold

Steel

SKD11

DC11

SKD-11

D2

2379 ISO-BM

SKS3

GOA

SKS-3

-

2843

Hot-work Mold

Steel

SKD61

DHA1

SKD-61

H-13

2344 ISO-BM

SKT4

GFA

SKT-4

L6

2714

Hardened:

11-

Unhardened:

3-18

Structural steel

Hardened:

13-29
Unhardened:

6-18

Structural steel

Hardened:

59 -64

It is suitable for manufacturing bearings, roller shafts, molds, guide posts, guide sleeves, rollers, balls and various mechanical parts. Mold guide pin and guide sleeve

SUJ2 is a high carbon and high chromium alloy steel with good overall performance, high and uniform hardness after quenching and tempering, high wear resistance and strength. High-carbon bearing steel.

Prehardened:

13-20

Large plastic mold and mold base

Prehardened:

25-30

It is often used in some high-temperature

and high-pressure-resistant valves and pressure vessels.

High temperature resistance, High pressure resistance

Prehardened:

30-33

Materials for small and medium-sized plastic molds, with a maximum thickness of 400mm.
High-volume production plastic molds.
Suitable for all kinds of plastic molds and mold bases.

It  is suitable for polishing and texturing.
Standard die steel, good machinability.

Prehardened:

30-33

Large molds for stamping and injection molds. For example, bumpers, dashboards, chairs, trash cans, bottle boxes, TV cabinets. Plastic products with large volume and high surface requirements, especially for 3c, home appliances, sports equipment, and other molds that require high-level texturing. Acrylic, PC and other high-end furnishings or car lights also use this product extensively on fixed molds and mold cores.

Due to the addition of 1% nickel, even a 1000m/m thick steel block has almost the same core hardness and surface hardness. The gloss of the injected product is not comparable to that of P20.

Prehardened:

38-42

High-gloss plastic parts, such as transparent sheets, rear lights, corner lights, backlight panels, computers, phone cases,
Camera parts, gears, etc., high-volume, high-strength, high-brightness plastic parts.

It has very good polishing, texturing processability, easy to grind, easy to process, easy to repair, long life and low deformation. The surface is beautiful and dense during processing.

Unhardened:

20-26
Hardened:

48-52

Extruded molds, or plastic mold bases that need to avoid corrosion.

High strength, high hardness (magnetic); , poor machinability, good wear resistance; can be heat treated to improve mechanical properties

Unhardened:

30-35
Hardened:

48-52

Ultra-mirror corrosion-resistant precision molds, camera parts, lenses, watch cases
Optical instrument parts, such as lenses, diamond lenses, LEDs, electronic micro switches, small plastic gears.
CD, DVD disc molds, IC packaging molds and PET preform molds.

Stainless steel mold, good corrosion resistance, small size change in heat treatment.
This steel has the highest mirror surface, the best balance of corrosion resistance and wear resistance.
Hardness HRC48-52 is often used.

Unhardened:

27-33
Hardened:

33-49

Suitable for  mold cores of highly corrosive plastic products (such as PVC, POM, CA, etc.) Suitable for hot runner type mold bases to avoid clogging of water holes, various types of shafts, and fiber-containing materials

Stainless steel has a higher carbon content, so it can ensure better strength after heat treatment. Due to the molybdenum-containing alloy and electroslag smelting, it has good corrosion resistance, wear resistance and polishing properties. The supplied hardness is HRC 27-33, which is the best crystalline structure.

Unhardened:

<25
Hardened:

50-61

For silicon steel sheet, high carbon steel, stainless steel sheet under 4mm thickness continuous punching cutting edge. Precision stamping, thread rolling, gear hobbing, drawing, forming, deep drawing, and cutting tools . Small fiber plastic molds.

This steel has very good grinding properties, shear strength and toughness.

Unhardened:

<17
Hardened:

38-64

It is widely used in the blanking of stamping dies for automobiles and computer cases. Its usage is much more than that of SKD-11. Heading dies, impression dies, dental plates, drilling tools and mechanical parts, measuring tools, etc.
Small wear-resistant plastic molds and high-strength guide bush.

The manganese content of this product is as high as 2% and the sulfur content is reduced, so its strength and toughness are greatly improved.

Hardened:

64-66

Cutting edge of continuous stamping die. Precision stamping, thread rolling, gear hobbing, drawing, forming, deep drawing, and cutting tools have very good effects. Generally small, fiber-containing plastic molds. Drill, reamers.

high speed steel

Unhardened:<20.5
Hardened:

31-52

Die casting: general hot work tool steel used in mold cores, barrels, and shunt heads.
Extrusion: Suitable for general light aluminum, such as 6061, 6063 pressed blocks, press rods, spacers, and main molds and barrels.
Forging: Suitable for die forging, such as aluminum, magnesium, copper, etc.
Plastic: Used as the core and important sliding block of high-end molds, and the screw, bullet and other important parts of the plastic machine.

Impact resistance. Also has high temperature tensile strength, high temperature wear resistance, high temperature toughness and good thermal conductivity
So it reduces the phenomenon of hot cracking, and is suitable for molds with insufficient water cooling.

Unhardened:<20.5
Hardened:

38-58

Suitable for all hammer forging and press forging dies, all kinds of hot knife tools. Bearing, anvil.
In the hot extrusion machinery, it is often used for tools such as the outer sleeve of the barrel and the pressing rod. High temperature stamping, cutting and punching die for aluminum alloy.

High performance steel for hammer forging mold.