20MnM0Ni4-5 EN 10250-3:1999, Number: 1.6311 |
Comparison of steel grades | |
| JUS | - | |
| DIN | 20MnM0Ni4-5 | |
| BS | - | |
| GOST | - | |
| AISI | - | |
| UNI | - | |
| NF | - | |
20MnM0Ni4-5 steel grade is one of grade in En10028-2, which is non alloy and alloy steels with specified elevated temperature properties.
In accordance with en10020, 20MnMoNi4-5 steel grade is alloy special steels.
20MnM0Ni4-5 Grade delivery condition is normalized and tempered or quenched and tempered.
Bebonsteel could supply 20MnM0Ni4-5 steel grade in super thick steel plate for fabricators serving the oil and gas industry, heat exchangers, weldable pressure vessels and boilers
20MnM0Ni4-5 steel plate Chemical analysis -% by mass
| Chemical elements | C | Si | Mn | P max. | S max. |
Cr | Mo | Ni** | - |
| %, by mass | 0,17- 0,23 | £ 0,40 | 1,00-1,50 | 0.035 | 0.035 | £ 0,50 | 0,45-0,60 | 0,40-0,80 | - |
| Permissible deviation | ± 0,02 | + 0,03 | ± 0,06 | + 0,005 | + 0,005 | + 0,05 | ± 0,06 | ± 0,05 | - |
At the option the manufacturer the elements aluminium, titanium, vanadium and niobium may be added singly or in combination for grain control purposes. Elements not quoted in tables shall not be added intentionally to the steel without the agreement of the purchaser, except for the purpose
of finishing the heat. For greater cross-sections up to 1,00 % Ni is admissible. Mechanical properties in the quenched and tempered condition
| Thickness of ruling section tR | |||||
| Diameter in mm | tR ≤ 160mm | 160< tR ≤330mm | 330<tR≤660mm | ||
| Re min. (N/mm2) | 420 | 390 | - | ||
| Rm min. (N/mm2) | 580 | 550 | - | ||
| A % min. | l-longitudinal | 17 | 17 | - | |
| tr -transverse | 14 | 14 | - | ||
| KV min (J) | l-longitudinal | 39 | 39 | - | |
| tr -transverse | 24 | 24 | - | ||
1N/mm2=1MPa Heat treatment conditions
| Quenching temperature, 0C | Tempering temperature, 0C |
| 870 to 940 | 630 to 680 |
Quenching from hardening may be carried out in oil, water, or water based solutions. Caution should be observed in the use of water as a quenching medium to avoid the risk of cracking the forgings
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Tags: 20MnM0Ni4-5
