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 values for a reference section and heat-treatment condition. Actual properties vary with dimension and treatment, and are confirmed on the mill certificate.
Available forms.
Size: 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 and 4130 are matching designations for the same steel across different standards (EN, AISI/SAE, JIS, GB, former DIN). They are near equivalents and may differ slightly in chemistry, so 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.