# 8620 steel equivalents

8620 steel is nearest to EN 1.6523 (20NiCrMo2-2), JIS SNCM220 and China GB 20CrNiMo. These are nearest equivalents, not identical grades: the governing standard or mill certificate decides.

| System | Designation |
|---|---|
| AISI / ASTM / SAE | 8620 |
| EN steel name | 20NiCrMo2-2 |
| EN steel number | 1.6523 |
| JIS | SNCM220 |
| China GB | 20CrNiMo |

Family: Nickel-chromium-molybdenum case-hardening steel

## What it is

A low-carbon nickel-chromium-molybdenum alloy steel made for carburising. After case-hardening it has a hard, wear-resistant surface over a tough core.

## Typical uses

Gears, pinions, camshafts, king pins, ring gears and other carburised wear parts.

## Machining notes

Machine before carburising; machinability is similar to other low-carbon alloy steels. Finish-grind critical surfaces after hardening.

## Related grades

- 1020 steel (1.0402): Plain carbon case-hardening steel
- 4140 steel (1.7225): Through-hardening alloy steel

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

## FAQ

**What is the European equivalent of 8620 steel?**
The nearest EN grade is 1.6523, steel name 20NiCrMo2-2.

**What is the JIS equivalent of 8620 steel?**
The nearest Japanese grade is SNCM220.

**What is the Chinese GB equivalent of 8620 steel?**
The nearest Chinese GB grade is 20CrNiMo.

**Is 1.6523 the same as 8620?**
1.6523 (20NiCrMo2-2) is the nearest European equivalent of 8620, 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 8620 used for?**
Gears, pinions, camshafts, king pins, ring gears and other carburised wear parts.

Source page: https://machinistcharts.com/material/8620-steel/
Updated: 2026-10-06
Publisher: MachinistCharts (https://machinistcharts.com)