Italy · UNI
X 20 Cr 13
UNI EN 10250-4 — Open die steel forgings for general engineering purposes - Part 4 : stainless steels
Chemical composition
| Element | min | max | Similar | Remarks |
|---|---|---|---|---|
| C | 0.16 | 0.25 | ||
| Cr | 12 | 14 | ||
| Mn | 1.5 | |||
| P | 0.04 | |||
| S | 0.03 | For products to be machined a controlled sulfur content of 0 | For products to be machined a controlled sulfur content of 0 | |
| Si | 1 |
Mechanical properties
| Heat treatment / condition | Yield strength | Tensile strength | Elongation | Reduction of area | Impact energy | Hardness |
|---|---|---|---|---|---|---|
| die forgings, forgings +QT700, <= 160 mm, forged bars | 500 | 700 850.00 | 13 | 25 | ||
| die forgings, forgings +QT800, <= 160 mm, forged bars | 600 | 800 950.00 | 12 | 20 | ||
| die forgings, bars, forgings, annealed | 760.00 | |||||
| die forgings, HB, forgings, annealed | 锻制棒材 230.00 |
Physical properties
20.0
| Elastic modulus | Mean thermal expansion | Thermal conductivity | Specific heat | Resistivity | Density | Poisson's ratio |
|---|---|---|---|---|---|---|
| 215.00；216.00；210.00；220.00 | 30.00；25.10 | 460.00 | 0.60 | 7.70 |
Typical physical values
| Density | Elastic modulus | Poisson's ratio | Remarks |
|---|---|---|---|
| 7.61–8.10 | 190.00–215.00 | 0.27–0.30 | 不锈钢的典型材料性能数值，此值不来源于标准，它是指示性指标，不能被用于设计用途。 |
| 7.86 | 190.00–210.00 | 0.27–0.30 | 低碳，高合金钢材料性能属性数值，此值不来源于标准，它是指示性指标，不能被用于设计用途。 |
High/low temperature
| Condition | Temperature ℃ | min |
|---|---|---|
| forgings quenched and tempered +QT800 | 400 | 355 |
| forgings quenched and tempered +QT800 | 350 | 405 |
| forgings quenched and tempered +QT800 | 300 | 440 |
| forgings quenched and tempered +QT800 | 250 | 460 |
| forgings quenched and tempered +QT800 | 200 | 475 |
| forgings quenched and tempered +QT800 | 150 | 495 |
| forgings quenched and tempered +QT800 | 100 | 515 |
| forgings quenched and tempered +QT700 | 400 | 330 |
| forgings quenched and tempered +QT700 | 350 | 365 |
| forgings quenched and tempered +QT700 | 300 | 395 |
| forgings quenched and tempered +QT700 | 250 | 415 |
| forgings quenched and tempered +QT700 | 200 | 430 |
| forgings quenched and tempered +QT700 | 150 | 445 |
| forgings quenched and tempered +QT700 | 100 | 460 |
Fatigue
1.锻件; Thickness: <= 160mm; 淬火及回火 (QT700); Reversed bending; T: 20°C; -
| Item | Detail |
|---|---|
| Product | forging; Thickness: <= 160mm; +QT700 |
| Experiment | Reversed bending; T: 20°C |
| Specimen |
| Property | Value |
|---|---|
| Yield strength (MPa) | 500.0 |
| Tensile strength (MPa) | 700.0 850.0 |
| Elongation (%) | 13.0 |
| No. | Cycles |
|---|---|
| 1 | 1E7 |
Heat treatment
| Type | 1 |
|---|---|
| Heat-treatment curve | Hardness-Tempering |
| Heat-treatment curve | CCT modified |
| Heat-treatment curve | CCT |
| Heat-treatment curve | TTT |
Similar grades
| Grade | Region | System |
|---|---|---|
| 1.4021 | Italy | UNI |
| 1.4021 |  Spain | UNE |
| X 20 Cr 13 | Spain | UNE |
| 1.4021 |  Romania | STAS |
| X 20 Cr 13 | Romania | STAS |
| 1.4021 |  Sweden | SS |
| X 20 Cr 13 | Sweden | SS |
| 1.4021 |  Switzerland | SNV |
| X 20 Cr 13 | Switzerland | SNV |
| 1.4021 |  Finland | SFS |
| X 20 Cr 13 | Finland | SFS |
| 1.4021 |  Poland | PN |
| X 20 Cr 13 | Poland | PN |
| 1.4021 |  Austria | ONORM |
| X 20 Cr 13 | Austria | ONORM |
| 1.4021 |  Norway | NS |
| X 20 Cr 13 | Norway | NS |
| 1.4021 |  Belgium | NBN |
| X 20 Cr 13 | Belgium | NBN |
| 1.4021 |  Hungary | MSZ |
| X 20 Cr 13 | Hungary | MSZ |
| 1.4021 | Czech Republic | CSN |
| X 20 Cr 13 | Czech Republic | CSN |
| 1.4021 | Bulgaria | BDS |
| X 20 Cr 13 | Bulgaria | BDS |
| 1.4021 |  United Kingdom | B.S. |
| X 20 Cr 13 | United Kingdom | B.S. |
| 1.4021 |  France | AFNOR NF |
| PK4 | Global | Enterprise standard |
| PK3 | Global | Enterprise standard |
| EskyLos 2083 | Global | Enterprise standard |
| Remanit 4028 IM | Global | Enterprise standard |
| Remanit 4028 | Global | Enterprise standard |
| Remanit 4021 IM | Global | Enterprise standard |
| IMCO420C | Global | Enterprise standard |
| IMCO420B | Global | Enterprise standard |
| IMCO420A | Global | Enterprise standard |
| 420D | Global | Enterprise standard |
| 420C/1 | Global | Enterprise standard |
| 12C27Mod | Global | Enterprise standard |
| BÖHLER T651 EXTRA | Global | Enterprise standard |
| BÖHLER N540 | Global | Enterprise standard |
| BÖHLER N320 | Global | Enterprise standard |
| Carpenter Stainless Type 420 Mold Steel | Global | Enterprise standard |
| 40H13 |  Russia | GOST |
| SUS 420J2 |  Japan | JIS |
| SUS 420J1 | Japan | JIS |
| X40Cr14 | Italy | UNI |
| X 30 Cr 13 | Italy | UNI |
| X 20 Cr 13 | France | AFNOR NF |
| 1.4034 |  European Union | EN |
| 1.4031 | European Union | EN |
| 1.4028 | European Union | EN |
| X 46 Cr 13 | European Union | EN |
| X 30 Cr 13 | European Union | EN |
| X 20 Cr 13 |  Germany | DIN |
| X 46 Cr 13 | Germany | DIN |
| X 30 Cr 13 | Germany | DIN |
| 1.4037 | Germany | DIN |
| 1.4034 | Germany | DIN |
| 1.4028 | Germany | DIN |
| 1.4021 | Germany | DIN |
| 1.4014 | Germany | WL |
| 1.2083 | Germany | DIN |