H12 Tool Steel (AISI H12 / DIN 1.2605 / JIS SKD62) is a high-performance hot work tool steel widely used in forging, extrusion, and die-casting applications. It offers excellent toughness, thermal fatigue resistance, and good wear resistance under high temperatures. H12 tool steel is well-suited for manufacturing hot forging dies, aluminum extrusion tools, hot shear blades, and pressure die-casting molds.
With its balanced chemical composition of chromium, molybdenum, tungsten, and vanadium, H12 steel provides superior strength and stability in demanding environments. We supply H12 tool steel in forged blocks, round bars, and plates, with precision machining services available upon request.
| Specifications of H12 Tool Steel: |
| Grade |
H12 |
| Standard |
ASTM A681,DIN EN ISO 4957,JIS G4404 |
| Thickness tolerance |
-0 to +0.1mm |
| Flatness |
0.01/100mm |
| Technology |
Hot Work / Forged / Cold Drawn |
| Surface roughness |
Ra ≤1.6 or Rz ≤6.3 |
| Specifications of 1.2605 Tool Steel: |
| AISI / ASTM |
DIN |
JIS |
AFNOR |
BS |
| H12 |
1.2605 / X35CrWMoV5-1 |
SKD62 |
35CDW5V |
BD2 |
| Chemical Composition H12 hot work tool steel: |
| C |
Cr |
Si |
Mn |
Mo |
V |
W |
| 0.35-0.42 |
4.75-5.5 |
0.8-1.2 |
0.2-0.5 |
1.1-1.75 |
0.3-0.6 |
1.1-1.75 |
H12 hot work tool steel is subjected to ultrasonic testing (UT) to ensure internal soundness and reliability for critical applications. The UT test detects internal defects such as inclusions, porosity, shrinkage cavities, or cracks that may compromise the steel’s performance under high thermal and mechanical stresses. Inspection is carried out in accordance with international standards (such as ASTM A388 or EN 10228), using calibrated probes to evaluate the entire cross-section. Only defect-free material with homogeneous internal structure is accepted, guaranteeing high toughness, excellent thermal fatigue resistance, and consistent quality for die casting, extrusion dies, and hot forging tools.
| SKD62 hot work die steel Applications: |
H12 tool steel is widely used for hot work applications including forging dies, extrusion dies, die-casting molds, hot shear blades, and hot forging punches. Its excellent toughness, heat resistance, and thermal fatigue strength make it ideal for aluminum and magnesium extrusion tools, hot press molds, and high-temperature tooling.
1.Black Surface – As-rolled or forged finish with oxide scale.
2.Ground Finish – Bright appearance with a slightly rough texture; not precision ground.
3.Machined Plate Finish – Bright and accurate dimensions; minor turning marks may be visible.
4.Peeled/Turned Finish – Bright with precise sizing; slight turning marks remain.
5.Polished Finish – Highly bright with precise dimensions; free from turning marks.
Q1: What is H12 tool steel used for?
A1: H12 is mainly used for hot work tooling such as forging dies, extrusion dies, and hot shear blades.
Q2: Is H12 tool steel similar to H13?
A2: Both are hot work steels, but H12 has higher toughness and thermal fatigue resistance, while H13 offers slightly higher hardness and wear resistance.
Q3: What are the equivalent grades of H12 tool steel?
A3: DIN 1.2605, JIS SKD62, and BS BD2 are equivalent grades.
Q4: Can H12 steel be heat-treated?
A4: Yes, it can be hardened and tempered to achieve required strength and toughness.
Reliable Quality – Our stainless steel bars, pipes, coils, and flanges are manufactured to meet international standards such as ASTM, AISI, EN, and JIS.
Strict Inspection – Every product undergoes ultrasonic testing, chemical analysis, and dimensional control to ensure high performance and traceability.
Strong Stock & Fast Delivery – We maintain regular inventory of key products to support urgent orders and global shipping.
Customized Solutions – From heat treatment to surface finish, SAKYSTEEL offers tailor-made options to match your exact requirements.
Professional Team – With years of export experience, our sales and technical support team ensures smooth communication, quick quotations, and full documentation service.
| SAKY STEEL'S Quality Assurance (including both Destructive and Non-Destructive) : |
1. Visual Dimension Test
2. Mechanical examining like tensile, Elongation and reduction of area.
3. Impact analysis
4. Chemical examination analysis
5. Hardness test
6. Pitting protection test
7. Penetrant Test
8. Intergranular Corrosion Testing
9. Roughness Testing
10. Metallography Experimental Test
| Custom Processing Capabilities: |
1.Hardening and tempering process
2.Vacuum heat treatment
3.Bright polished surface finish
4.Bright milled surface finish
5.CNC precision machining
6.Deep hole drilling
7.Cutting into smaller sections
8.Machining to near-net mold shape
We welcome your price inquiries based on your drawings.
1. Packing is quite important especially in a case of international shipments in which consignment pass through various channels to reach the ultimate destination, so we put special concern regarding packaging.
2. Saky Steel's pack our goods in numerous ways based on the products. We pack our products in multiple ways, such as,
