25CrMo4 — DIN 2510 material code KG
25CrMo4 (material number 1.7218) is a chromium-molybdenum low-alloy steel listed in DIN 267-13 Table 2 for high-temperature bolting service. Supplied quenched and tempered (+QT), hardness 195 to 240 HV. Minimum service temperature −60 °C; maximum short-term service 500 °C; maximum long-term service 550 °C.
DIN 267-13 properties
| Material symbol | KG |
|---|---|
| Material number | 1.7218 |
| Material name | 25CrMo4 |
| Heat treatment condition | +QT (quenched and tempered) |
| Hardness range (HV) | 195 to 240 |
| Minimum service temperature | −60 °C |
| Maximum short-term service temperature | 500 °C |
| Maximum long-term service temperature | 550 °C |
Source: DIN 267-13:2007-05, Table 2 (Steels and nickel alloys as in DIN EN 10269 for high and low service temperatures).
Applicable DIN 2510 parts
25CrMo4 (code KG) is the standard material for DIN 2510 Part 7 extension sleeves and is also used for Part 5 hexagon nuts and Part 6 cap nuts.
- DIN 2510 Part 7: Extension Sleeves (Type D, E)
- DIN 2510 Part 5: Hexagon Nuts (Type NF, TF)
- DIN 2510 Part 6: Cap Nuts (Type AF, BF)
Companion DIN 2510 materials
- 24CrMo5: code G per DIN 2510 designation
- 21CrMoV5-7: code GA per DIN 267-13
- 1.4980: code SD per DIN 267-13 (X6NiCrTiMoVB25-15-2 / A-286)
For mill test certificates (EN 10204 3.1 or 3.2) and quoted lead time on DIN 2510 components in 25CrMo4, email info@torqbolt.com or WhatsApp +91-22-66157017.