Czech Republic · CSN
G 20 Mn 5
CSN EN 10340 — Steel castings for structural uses
Chemical composition
wt% · log scale- min – max range
- typical value
Mechanical properties
value range by conditionPhysical properties
vs. temperatureChemical composition
| Element | min | max | Similar | Remarks |
|---|---|---|---|---|
| C | 0.17 | 0.23 | ||
| Cr | 0.3 | |||
| Cr+Mo+Ni+V+Cu | 1 | |||
| Cu | 0.3 | |||
| Mn | 1 | 1.6 | ||
| Mo | 0.12 | |||
| Ni | 0.8 | |||
| P | 0.02 | |||
| S | 0.02 | For castings of ruling thickness < 28 mm | ||
| Si | 0.6 | |||
| V | 0.03 |
Mechanical properties
| Heat treatment / condition | Yield strength | Tensile strength | Elongation | Reduction of area | Impact energy | Hardness |
|---|---|---|---|---|---|---|
| castings +N, <= 30 mm | ≥300 | 480–620 | ≥20 | ≥50 KV (room temperature)；≥27 KV (-30ºC) | ||
| castings +QT, <= 100 mm | ≥300 | 500–650 | ≥22 | ≥60 KV (room temperature)；≥27 KV (-40ºC) |
Physical properties
20.0
| Elastic modulus | Mean thermal expansion | Thermal conductivity | Specific heat | Resistivity | Density | Poisson's ratio |
|---|---|---|---|---|---|---|
| 460.00 | 7.80 |
Typical physical values
| Density | Elastic modulus | Poisson's ratio | Remarks |
|---|---|---|---|
| 7.86 | 203.00 | 0.27–0.30 | Typical properties for low-carbon, low-alloy steel. These values are not taken from the standard; they are indicative and must not be used for design. |
Similar grades
| Grade | Region | System |
|---|---|---|
| 1.6220 |  Italy | UNI |
| G 20 Mn 5 | Italy | UNI |
| G 20 Mn 5 |  Spain | UNE |
| 1.6220 |  Romania | STAS |
| G 20 Mn 5 | Romania | STAS |
| 1.6220 |  Sweden | SS |
| G 20 Mn 5 | Sweden | SS |
| G 20 Mn 5 |  Switzerland | SNV |
| 1.6220 |  Finland | SFS |
| G 20 Mn 5 | Finland | SFS |
| 1.6220 |  Poland | PN |
| G 20 Mn 5 | Poland | PN |
| 1.622 |  Austria | ONORM |
| G 20 Mn 5 | Austria | ONORM |
| 1.6220 |  Norway | NS |
| G 20 Mn 5 | Norway | NS |
| 1.622 |  Belgium | NBN |
| G 20 Mn 5 | Belgium | NBN |
| 1.6220 |  Hungary | MSZ |
| G 20 Mn 5 | Hungary | MSZ |
| 1.6220 |  Germany | DIN |
| G 20 Mn 5 | Germany | DIN |
| 1.622 | Bulgaria | BDS |
| G 20 Mn 5 | Bulgaria | BDS |
| 1.6220 |  United Kingdom | B.S. |
| G 20 Mn 5 | United Kingdom | B.S. |
| 1.6220 |  France | AFNOR NF |
| G 20 Mn 5 | France | AFNOR NF |
| 1.6220 | Czech Republic | CSN |