H11 1.2343 SKD6 Hot-work Tool Steel Bars and Plates
This is a medium-alloy, air-hardening hot-work die steel with excellent toughness, hot strength, and thermal fatigue resistance, capable of being hardened by air cooling. When quenched in air at relatively low austenitizing temperatures, it exhibits minimal distortion during heat treatment, produces less oxide scale during air quenching, and demonstrates good resistance to erosion caused by molten aluminum.
Applications of H11
Its resistance to erosion by high-temperature molten aluminum makes it ideal for manufacturing aluminum die-casting molds—for example, cylinder blocks and transmission housings for automobile engines. With high strength at elevated temperatures and excellent resistance to deformation, it is also well-suited for producing hot forging dies, such as copper alloy forging dies for valves and pipe fittings.
Equivalent Grades and Commonly Used Specifications of H11
| Steel Grade | Specification | Specification Name |
| 4Cr5MoSiV / T23352 | GB/T 1299 | Tool and Mould Steels |
| GB/T 33811 | Alloy Tool and Mould Steel Sheets and Plates | |
| H11/T20811 | ASTM A681 | Standard Specification for Tool Steels Alloy |
| 1.2343 / X37CrMoV5-1 | DIN EN ISO 4957 | Tool Steels |
| SKD6 | JIS G 4404 | Alloy tool steels |
| 4H5MFS | GOST5950-2000 | Bars, Strips and Hanks Made of Tool Alloy Steel |
| Products produced as per other specifications or technical agreements (if need) are available. | ||
Typical Chemical Composition of H11
|
Elements |
C | Si | Mn | P | S | Cr | Mo | V |
| Contents% | 0.33~0.43 | 0.80~1.20 | 0.20~0.50 | ≤0.025 | ≤0.025 | 4.75~5.50 | 1.10~1.60 |
0.30~0.60 |
| Products produced as per other specifications or technical agreements (if need) are available. | ||||||||
Typical Heat Treatment Condition and Mechanical Properties of H11
|
Delivery Condition |
Mechanical Properties and Hardness of Heat-Treated Specimens | ||||||
| Rp0.2/(N/mm2) | Rm/(N/mm2) | A/% | Zb/% | Aku2d/J | HBW |
HRC |
|
|
Annealed Condition |
/ | / | / | / | / | ≤229 |
/ |
| As-quenched Condition
Preheat at 790℃ ±15℃; heat at 1010℃ (salt bath) or 1020℃ (controlled atmosphere furnace), holding temperature 1020℃ ±6℃ with soaking time of 5–15 min, followed by oil quenching. Double temper at 550℃ ±6℃, 2 hours for each tempering cycle. |
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| Products produced as per other specifications or technical agreements (if need) are available. | |||||||
Product Forms and Size Range of H11
|
Product forms |
Size range |
|
Bars |
Diameter or side length: 5.0mm~1000mm |
| Flats |
thickness: 4.0mm~1000mm width: 300mm~2200mm |
| Produce as other form and size according to technical requirements are available. | |
