European Union · EN
25 CrMo 4
EN 10305-1:2010 — EN 10305-1
Chemical composition
| Element | min | max | Similar | Remarks |
|---|---|---|---|---|
| C | 0.22 | 0.29 | ||
| Cr | 0.9 | 1.2 | ||
| Mn | 0.6 | 0.9 | ||
| Mo | 0.15 | 0.3 | ||
| P | 0.025 | |||
| S | 0.035 | |||
| Si | 0.4 |
Mechanical properties
| Heat treatment / condition | Yield strength | Tensile strength | Elongation | Reduction of area | Impact energy | Hardness |
|---|---|---|---|---|---|---|
| Seamless tubes +C | ≥720 | ≥4 Elongation after fracture | ||||
| Seamless tubes +LC | ≥670 | ≥6 Elongation after fracture |
Physical properties
-100.0
| Elastic modulus | Mean thermal expansion | Thermal conductivity | Specific heat | Resistivity | Density | Poisson's ratio |
|---|---|---|---|---|---|---|
| 217.00 | 10.50 | 371.00 |
Typical physical values
| Density | Elastic modulus | Poisson's ratio | Remarks |
|---|---|---|---|
| 7.86 | 203.00 | 0.27–0.30 | 低碳，低合金钢的典型性能数值。此值不来源于标准，它是指示性指标，不能被用于设计用途。 |
Fatigue
| Item | Detail |
|---|---|
| Product | Semi Finished products; Thickness: <= 16 mm; +QT |
| Experiment | Reversed bending; T: 20°C |
| Specimen |
| Property | Value |
|---|---|
| Yield strength (MPa) | 700.0 |
| Tensile strength (MPa) | 900.0 1100.0 |
| Elongation (%) | 12.0 |
| Reduction of area (%) | 50.0 |
| No. | Cycles |
|---|---|
| 1 | 1E7 |
Creep
| Temperature ℃ | Time h | Rp1 | CRS |
|---|---|---|---|
| 420 | 10000.0h | 274.0 | 387.0 |
| 420 | 100000.0h | 221.0 | 308.0 |
| 430 | 10000.0h | 258.0 | 364.0 |
| 430 | 100000.0h | 203.0 | 281.0 |
| 440 | 10000.0h | 242.0 | 338.0 |
| 440 | 100000.0h | 186.0 | 253.0 |
| 450 | 10000.0h | 226.0 | 311.0 |
| 450 | 100000.0h | 171.0 | 226.0 |
| 460 | 10000.0h | 210.0 | 283.0 |
| 460 | 100000.0h | 155.0 | 200.0 |
| 470 | 10000.0h | 195.0 | 255.0 |
| 470 | 100000.0h | 141.0 | 178.0 |
| 480 | 10000.0h | 180.0 | 226.0 |
| 480 | 100000.0h | 127.0 | 157.0 |
| 490 | 10000.0h | 163.0 | 200.0 |
| 490 | 100000.0h | 112.0 | 136.0 |
| 500 | 10000.0h | 147.0 | 176.0 |
| 500 | 100000.0h | 98.0 | 118.0 |
| 510 | 10000.0h | 130.0 | 153.0 |
| 510 | 100000.0h | 83.0 | 100.0 |
| 520 | 10000.0h | 115.0 | 133.0 |
| 520 | 100000.0h | 69.0 | 82.0 |
| 530 | 10000.0h | 98.0 | 114.0 |
| 530 | 100000.0h | 54.0 | 66.0 |
| 540 | 10000.0h | 81.0 | 95.0 |
| 540 | 100000.0h | 39.0 | 51.0 |
| 550 | 10000.0h | 64.0 | 79.0 |
| 550 | 100000.0h | 25.0 | 36.0 |
Heat treatment
| Type | 1 |
|---|---|
| Heat-treatment curve | Hardness-Tempering |
| Heat-treatment curve | CCT modified |
| Heat-treatment curve | CCT |
| Heat-treatment curve | TTT |
| Heat-treatment curve | 淬透性 |
Similar grades
| Grade | Region | System |
|---|---|---|
| FE-PL1502 | European Union | EN |
| 1.7218 |  Italy | UNI |
| 1.7218 |  Spain | UNE |
| 1.7218 |  Romania | STAS |
| 25 CrMo 4 | Romania | STAS |
| 1.7218 |  Sweden | SS |
| 25 CrMo 4 | Sweden | SS |
| 1.7218 |  Switzerland | SNV |
| 25 CrMo 4 | Switzerland | SNV |
| 1.7218 |  Finland | SFS |
| 25 CrMo 4 | Finland | SFS |
| 1.7218 |  Poland | PN |
| 25 CrMo 4 | Poland | PN |
| 1.7218 |  Austria | ONORM |
| 25 CrMo 4 | Austria | ONORM |
| 1.7218 |  Norway | NS |
| 1.7218 |  Belgium | NBN |
| 1.7218 |  Hungary | MSZ |
| 25 CrMo 4 | Hungary | MSZ |
| 1.7218 | Czech Republic | CSN |
| 25 CrMo 4 | Czech Republic | CSN |
| 1.7218 | Bulgaria | BDS |
| 25 CrMo 4 | Bulgaria | BDS |
| 1.7218 |  United Kingdom | B.S. |
| 1.7218 |  France | AFNOR NF |
| 25 CrMo 4 | International standard | ISO |
| 25 CrMo 4 | Norway | NS |
| 25 CrMo 4 | Belgium | NBN |
| 25 CrMo 4 | Spain | UNE |
| 25 CrMo 4 | Italy | UNI |
| 25 CrMo 4 | France | AFNOR NF |
| 1.7218 | European Union | EN |
| GS-34 CrMo 4 |  Germany | SEW |
| GS-25 CrMo 4 | Germany | SEW |
| 34 CrMo 4 | Germany | SEW |
| GS-25 CrMo 4 | Germany | DIN |
| GS-34 CrMo 4 | Germany | DIN |
| 34 CrMo 4 | Germany | DIN |
| 25 CrMo 4 | Germany | DIN |
| 1.7220 | Germany | DIN |
| 1.7218 | Germany | DIN |
| 25 CrMo 4 | United Kingdom | B.S. |