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Tool Steel Catalog
Aobo Steel supplies tool steel round bar and plate for distributors, stockists, mold material suppliers, and industrial tooling buyers. This catalog helps you find the right grade page by steel family, equivalent grade, and application direction.
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Available Tool Steel Grades
Choose a grade below to open the related product page. Each page provides grade equivalents, supply direction, typical applications, and material information for quotation discussions.
D2 Tool Steel | 1.2379 | SKD11
Common choice for blanking dies, forming dies, punches, shear blades, and wear-focused cold work tooling.
D3 Tool Steel | 1.2080 | SKD1
High-carbon, high-chromium cold work grade used where abrasive wear resistance is the main requirement.
D6 Tool Steel | 1.2436 | SKD2
High-carbon, high-chromium cold work steel used for wear-resistant dies and cutting tools.
A2 Tool Steel | 1.2363 | SKD12
Air-hardening cold work steel used when dimensional stability and a balanced wear-toughness profile are required.
O1 Tool Steel | 1.2510 | SKS3
Oil-hardening tool steel for general cold work tools, gauges, knives, and tooling parts requiring good machinability.
O2 Tool Steel | 1.2842
Oil-hardening cold work grade used for tools that need reliable hardenability and practical machining before hardening.
S1 Tool Steel | 1.2550
Shock-resisting tool steel for chisels, punches, impact tools, and tooling parts exposed to sudden loading.
S7 Tool Steel | 1.2355
Used for impact tools, punches, and tooling where cracking or chipping is a larger risk than abrasive wear.
DC53 Tool Steel
Cold work tool steel used when better toughness and dimensional stability are needed compared with conventional D2-type grades.
52100 Bearing Steel | 1.3505 | 100Cr6 | GCr15
High-carbon chromium bearing steel used for bearing parts, wear components, and precision mechanical parts.
H10 Tool Steel | 1.2365 | SKD7
Hot work tool steel used in elevated-temperature tooling where heat resistance and toughness are required.
H11 Tool Steel | 1.2343 | SKD6
Hot work steel for die casting, extrusion tooling, hot shear blades, and shock-loaded hot work applications.
H13 Tool Steel | 1.2344 | SKD61
Widely used for aluminum die casting dies, hot forging dies, extrusion dies, and thermal-fatigue tooling.
H21 Tool Steel | 1.2581 | SKD5
Hot work grade for applications requiring stronger hot hardness and wear resistance at elevated temperature.
L6 Tool Steel | 1.2714 | SKT4
Tough tool steel used for large dies, hot work tooling, and tooling components requiring strength and impact resistance.
M2 High Speed Steel | 1.3343 | SKH51
General-purpose HSS for drills, milling cutters, cutting tools, punches, and wear parts requiring hot hardness.
M35 High Speed Steel | 1.3243 | SKH55
Cobalt HSS used where cutting temperature is higher and M2 may not provide enough hot hardness.
M42 High Speed Steel | 1.3247 | SKH59
High-performance cobalt HSS for demanding cutting tools where red hardness and wear resistance are critical.
P20 Tool Steel | 1.2311 | 3Cr2Mo
Plastic mold steel for injection molds, mold bases, and mold components requiring stable machining performance.
P20+Ni Tool Steel | 1.2738
Nickel-modified plastic mold steel used for larger molds where better through-hardness is required.
Cr12 Tool Steel
Chinese cold work tool steel used for wear-resistant dies, punches, and cold work tooling.
Cr12MoV Tool Steel
Common Chinese cold work die steel used for blanking dies, forming dies, punches, and wear tools.
9SiCr Tool Steel
Chinese low-alloy tool steel used for cold work tools, cutting tools, gauges, and wear-resistant tooling parts.
Cr12Mo1V1 Tool Steel | D2-type
Chinese D2-type cold work steel used where wear resistance and dimensional stability are required.
Cr5Mo1V Tool Steel | A2-type
Air-hardening cold work tool steel used for dies and tools requiring stability and balanced performance.
6CrW2Si Tool Steel
Chinese alloy tool steel used for shear blades, punches, and tools requiring strength and wear resistance.
GCr15 Bearing Steel | 52100 | 1.3505
High-carbon chromium bearing steel used for bearing parts, wear components, and precision mechanical parts.
4Cr5MoSiV1 Tool Steel | H13-type
Chinese hot work tool steel used for die casting, extrusion, forging dies, and thermal-fatigue tooling.
4Cr5MoSiV Tool Steel | H11-type
Chinese hot work tool steel used where hot strength, toughness, and thermal stability are required.
5CrNiMo Tool Steel
Chinese hot work die steel used for forging dies and tooling components requiring toughness and impact resistance.
9CrWMn Tool Steel | O1-type
Chinese low-alloy cold work tool steel used for gauges, dies, punches, and tools needing low deformation.
5CrMnMo Tool Steel
Chinese hot work die steel used for forging dies and hot tooling requiring toughness and strength.
9Cr18Mo Stainless Steel | 440C-type
High-carbon martensitic stainless steel used for wear parts, bearing-related parts, and corrosion-resisting tooling.
Tool Steel Grades by Category
This table is designed for fast scanning. Open the grade page when you already know the steel family or equivalent grade.
| Category | Grade | Equivalent Grades | Typical Application Direction | Product Page |
|---|---|---|---|---|
| Cold Work Tool Steel | D2 | 1.2379 / SKD11 | Blanking dies, forming dies, punches, shear blades | View D2 |
| Cold Work Tool Steel | D3 | 1.2080 / SKD1 | High-wear cold work tools, drawing dies, blanking tools | View D3 |
| Cold Work Tool Steel | D6 | 1.2436 / SKD2 | Wear-resistant cold work dies and cutting tools | View D6 |
| Cold Work Tool Steel | A2 | 1.2363 / SKD12 | Air-hardening cold work tools, gauges, forming dies | View A2 |
| Cold Work Tool Steel | O1 | 1.2510 / SKS3 | General cold work tools, gauges, knives, punches | View O1 |
| Cold Work Tool Steel | O2 | 1.2842 | Oil-hardening cold work tools and general tooling parts | View O2 |
| Shock-Resisting Tool Steel | S1 | 1.2550 | Chisels, punches, shock-loaded tooling | View S1 |
| Shock-Resisting Tool Steel | S7 | 1.2355 | Impact tools, punches, tools exposed to chipping risk | View S7 |
| Cold Work Tool Steel | DC53 | DC53 | Cold work dies requiring toughness and dimensional stability | View DC53 |
| Bearing Steel | 52100 | 1.3505 / 100Cr6 / GCr15 | Bearing parts, precision wear components | View 52100 |
| Hot Work Tool Steel | H10 | 1.2365 / SKD7 | Hot work tools and elevated-temperature tooling | View H10 |
| Hot Work Tool Steel | H11 | 1.2343 / SKD6 | Die casting dies, extrusion tools, hot shear blades | View H11 |
| Hot Work Tool Steel | H13 | 1.2344 / SKD61 | Aluminum die casting dies, hot forging dies, extrusion dies | View H13 |
| Hot Work Tool Steel | H21 | 1.2581 / SKD5 | Hot work tooling requiring hot hardness and wear resistance | View H21 |
| Hot Work / Tough Tooling Steel | L6 | 1.2714 / SKT4 | Large dies, tough tooling parts, impact-loaded tooling | View L6 |
| High Speed Steel | M2 | 1.3343 / SKH51 | Drills, milling cutters, cutting tools, punches | View M2 |
| High Speed Steel | M35 | 1.3243 / SKH55 | Cobalt HSS cutting tools and high-temperature cutting | View M35 |
| High Speed Steel | M42 | 1.3247 / SKH59 | High-performance cutting tools requiring red hardness | View M42 |
| Plastic Mold Steel | P20 | 1.2311 / 3Cr2Mo | Plastic injection molds, mold bases, mold components | View P20 |
| Plastic Mold Steel | P20+Ni | 1.2738 | Large plastic molds requiring better through-hardness | View P20+Ni |
| GB Standard Tool Steel | Cr12 | GB Cr12 | Wear-resistant cold work dies and punches | View Cr12 |
| GB Standard Tool Steel | Cr12MoV | GB Cr12MoV | Blanking dies, forming dies, wear-focused tooling | View Cr12MoV |
| GB Standard Tool Steel | 9SiCr | GB 9SiCr | Cold work tools, cutting tools, gauges | View 9SiCr |
| GB Standard Tool Steel | Cr12Mo1V1 | GB Cr12Mo1V1 / D2-type | Cold work dies requiring wear resistance and stability | View Cr12Mo1V1 |
| GB Standard Tool Steel | Cr5Mo1V | GB Cr5Mo1V / A2-type | Air-hardening cold work dies and precision tools | View Cr5Mo1V |
| GB Standard Tool Steel | 6CrW2Si | GB 6CrW2Si | Shear blades, punches, and wear-resistant tooling | View 6CrW2Si |
| Bearing / GB Steel | GCr15 | GB GCr15 / 52100 / 1.3505 | Bearing parts, wear components, precision parts | View GCr15 |
| GB Standard Hot Work Steel | 4Cr5MoSiV1 | GB 4Cr5MoSiV1 / H13-type | Die casting dies, extrusion dies, hot work tooling | View 4Cr5MoSiV1 |
| GB Standard Hot Work Steel | 4Cr5MoSiV | GB 4Cr5MoSiV / H11-type | Hot work dies requiring toughness and heat resistance | View 4Cr5MoSiV |
| GB Standard Tool Steel | 5CrNiMo | GB 5CrNiMo | Forging dies and impact-loaded hot work tooling | View 5CrNiMo |
| GB Standard Tool Steel | 9CrWMn | GB 9CrWMn / O1-type | Cold work dies, gauges, tools with low deformation requirement | View 9CrWMn |
| GB Standard Hot Work Steel | 5CrMnMo | GB 5CrMnMo | Forging dies and hot work tooling | View 5CrMnMo |
| GB Stainless Tool Steel | 9Cr18Mo | GB 9Cr18Mo / 440C-type | Corrosion-resisting wear parts and bearing-related parts | View 9Cr18Mo |
Quick Selection by Application
Start from the working condition. Hardness alone is not enough for tool steel selection. Wear, chipping, heat, and dimensional stability usually decide the grade.
How to Narrow the Grade Choice
Select a suitable grade based on the failure mode and working conditions. This section helps reduce wrong inquiries before quotation.
| Main Requirement | Common Grade Direction | Practical Note |
|---|---|---|
| Abrasive wear resistance | D2, D3, D6, Cr12, Cr12MoV, Cr12Mo1V1, M2, M42 | Useful for cutting, blanking, and wear-focused tooling. Check toughness if the tool chips. |
| Better toughness | S7, S1, H11, L6, 5CrNiMo, 5CrMnMo | Useful when cracks or impact breakage are more serious than wear loss. |
| Hot work service | H13, H11, H21, 4Cr5MoSiV1, 4Cr5MoSiV | Used for die casting, forging, extrusion, and tools exposed to repeated heating and cooling. |
| High-speed cutting | M2, M35, M42 | Selection depends on cutting temperature, wear rate, and expected tool life. |
| Plastic mold work | P20, P20+Ni | Good starting grades for mold machining and general injection mold applications. |
| Shear blade and punch applications | 6CrW2Si, Cr12MoV, D2, S7 | Choose by cutting load, impact level, edge chipping risk, and wear condition. |
| Bearing and precision wear parts | GCr15 / 52100 / 1.3505 | Used when high hardness, wear resistance, and bearing performance are required. |
| Corrosion-resisting wear parts | 9Cr18Mo / 440C-type stainless steel | Used when wear resistance and moderate corrosion resistance are both required. |