Alloy Steel
25CrMo4 · 1.7218
Also known as 4130
Cr-Mo steel for tubes, fittings and lightly hardened parts.
25CrMo4 (material 1.7218, equivalent to AISI 4130) is a chromium-molybdenum steel with good strength and weldability, widely used for seamless tubes, pressure parts, fittings and welded structures.
International equivalents.
The same steel by country and standard — near matches; mill certificate governs.
Chemical composition.
Indicative, % by weight per EN 10083-3. Mill certificate governs.
| Element | % |
|---|---|
| C | 0.22 – 0.29 |
| Si | ≤ 0.40 |
| Mn | 0.60 – 0.90 |
| Cr | 0.90 – 1.20 |
| Mo | 0.15 – 0.30 |
Mechanical properties.
Indicative; depends on dimension and heat treatment.
Available forms.
Size range: Ø 8 – 300 mm
Typical applications.
- Seamless tubes
- Fittings & flanges
- Welded structures
- Lightly stressed shafts
FAQ.
What is 25CrMo4?
25CrMo4 (material 1.7218, equivalent to AISI 4130) is a chromium-molybdenum steel with good strength and weldability, widely used for seamless tubes, pressure parts, fittings and welded structures.
Is 25CrMo4 the same as 4130?
Yes — 25CrMo4 is the European (EN) designation, while 4130 are the matching names used in other countries and standards (for example AISI/SAE in the USA, JIS in Japan, GB in China, former DIN in Germany). They are near equivalents and may differ slightly in chemistry; the mill certificate governs the exact specification.
What are the international equivalents of 25CrMo4?
25CrMo4 corresponds to 25CrMo4 (1.7218) (EN), 4130 (AISI / SAE), SCM430 (JIS). Equivalents are nearest matches by country/standard; the mill certificate governs the exact specification.
In which forms is 25CrMo4 available?
25CrMo4 is supplied as Round bar, Bright / cold-drawn bar, Tube, in Ø 8 – 300 mm.
What is 25CrMo4 used for?
Typical applications include Seamless tubes, Fittings & flanges, Welded structures, Lightly stressed shafts.