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DIN 1.2888 alloy steel tube
Material Properties
Basic Information
1.2888 Tool Steel is a hot work alloy tool steel according to the German DIN standard.
Mat.No. (Wr.Nr.) designation: 1.2888
DIN designation: X20CoCrWMo10-9
Physical Properties
Density: about 7.85kg/dm³.
Thermal conductivity: high value, it can conduct heat quickly under high temperature, which is conducive to the heat dissipation of the mold in the working process and prevent local overheating.
Process performance
Hot working properties: hot working temperature range between 1050-900 ℃, in this temperature range, the steel has good plasticity, easy to forge, rolling and other hot working processes, can be processed into a variety of shapes of tools and molds.
Heat treatment properties: annealing temperature of 720-850 ℃, quenching temperature of 1100-1150 ℃, the cooling medium can choose oil or air, tempering temperature of 600-750 ℃. Through the reasonable heat treatment process, can make the steel to obtain good overall performance.
Chemical Composition
| Element Serial Number | C | Si | Mn | P | S | Cr | V | Mo | W | Co | Ni | Nb | Fe |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| min | 0.17 | 0.15 | 0.4 | 0 | 0 | 9 | 0.1 | 1.8 | 5 | 9.5 | 0 | 0.1 | - |
| max | 0.23 | 0.35 | 0.6 | 0.03 | 0.035 | 10 | 0.5 | 2.2 | 6 | 10.5 | 1 | 0.3 | - |
| Actual Value | 0.23 | 0.33 | 0.45 | 0.03 | 0.02 | 9.35 | 0.20 | 1.98 | 5.22 | 9.71 | 0.53 | 0.2 | 72.20 |
Mechanical Properties
| Mechanical Property | Value |
|---|---|
| Tensile Strength | 661 MPa - 2510 MPa |
| Yield Strength | ≥ 12 MPa |
| Elongation | ≥ 96% |
| Brinell Hardness | 243 HBS - 410 HBS |
| Rockwell Hardness | ~30 HRC |
Application Fields
Die-casting mold: used in aluminum die-casting, magnesium alloy die-casting, copper die-casting mold nozzle head, nozzle body, infusion tube and other parts, can withstand high temperature, high pressure metal liquid impact, to ensure the service life of the mold and casting quality.
Extrusion molds: extrusion molds for copper, copper alloy, steel and other materials, including special molds, die-casting molds, etc., can resist the friction and pressure of the material in the extrusion process, and maintain the shape and dimensional accuracy of the mold.
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Similar Steel
| Similar Steel | Composition Similarities | Composition Differences | Performance Similarities | Performance Differences | Applications |
|---|---|---|---|---|---|
| H13 (4Cr5MoSiV1) | Both contain elements such as chromium (Cr), molybdenum (Mo), and vanadium (V). Chromium can improve hardenability and oxidation resistance, and molybdenum can enhance thermal strength and tempering stability. | Chromium content in H13 is about 4.75 - 5.50%, while in 1.2888 it is 9.00 - 10.00%. Molybdenum content in H13 is 1.10 - 1.75%, and in 1.2888 it is 1.80 - 2.20%. | Both have good thermal fatigue resistance and toughness, and can resist thermal fatigue cracks well in hot - working die applications. | 1.2888 has higher high - temperature strength and hardness due to its higher alloy element content. | Widely used in die - casting molds, hot extrusion molds, etc. |
| S7 | Both contain elements like carbon, manganese, silicon, chromium, molybdenum, etc. | Carbon content in S7 is generally 0.45 - 0.55%, lower than that in 1.2888. Chromium content is about 4.75 - 5.50%, also lower than that in 1.2888. | Both have good toughness and can withstand impact loads. | S7 is inferior to 1.2888 in high - temperature strength and hot - hardness. | Commonly used for manufacturing tools and molds subject to large impacts, such as punches and hammers. |
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