# 4130 steel equivalents

4130 steel is nearest to EN 1.7218 (25CrMo4), JIS SCM430 and China GB 30CrMo. These are nearest equivalents, not identical grades: the governing standard or mill certificate decides.

| System | Designation |
|---|---|
| AISI / ASTM / SAE | 4130 |
| EN steel name | 25CrMo4 |
| EN steel number | 1.7218 |
| JIS | SCM430 |
| China GB | 30CrMo |

Family: Chromium-molybdenum alloy steel

## What it is

A chromium-molybdenum low-alloy steel, often called chromoly. It combines good strength and toughness with good weldability for an alloy steel.

## Typical uses

Aircraft and motorsport tube frames, roll cages, bicycle frames, pressure vessel parts and general structural tube.

## Machining notes

Machines well in the normalised or annealed condition. Weld procedures for thin tube are well established; thick sections need preheat.

## Related grades

- 4140 steel (1.7225): Higher-carbon chromium-molybdenum steel

Equivalents are nearest matches, not identical grades. The governing standard or mill certificate decides.

## FAQ

**What is the European equivalent of 4130 steel?**
The nearest EN grade is 1.7218, steel name 25CrMo4.

**What is the JIS equivalent of 4130 steel?**
The nearest Japanese grade is SCM430.

**What is the Chinese GB equivalent of 4130 steel?**
The nearest Chinese GB grade is 30CrMo.

**Is 1.7218 the same as 4130?**
1.7218 (25CrMo4) is the nearest European equivalent of 4130, not an identical grade. Composition limits and required properties differ in detail, so check the governing standard or the mill certificate when it matters.

**What is 4130 used for?**
Aircraft and motorsport tube frames, roll cages, bicycle frames, pressure vessel parts and general structural tube.

Source page: https://machinistcharts.com/material/4130-steel/
Updated: 2026-10-06
Publisher: MachinistCharts (https://machinistcharts.com)