# 310S stainless steel equivalents

310S stainless steel is nearest to EN 1.4845 (X8CrNi25-21), JIS SUS310S and China GB 06Cr25Ni20. These are nearest equivalents, not identical grades: the governing standard or mill certificate decides.

| System | Designation |
|---|---|
| AISI / ASTM / SAE | 310S |
| EN steel name | X8CrNi25-21 |
| EN steel number | 1.4845 |
| JIS | SUS310S |
| China GB | 06Cr25Ni20 |

Family: Austenitic heat-resisting stainless

## What it is

A high-chromium, high-nickel austenitic heat-resisting stainless steel, the low-carbon version of 310. It is chosen for oxidation resistance at high temperature rather than for corrosion resistance at room temperature.

## Typical uses

Furnace parts, heat-treatment baskets and fixtures, burner parts, kiln and boiler components.

## Machining notes

Tough and work-hardens. Use rigid setups, sharp tools, lower speeds than for 304 and a constant feed.

## Related grades

- 321 stainless steel (1.4541): Stabilised grade for moderate heat
- 304 stainless steel (1.4301): General-purpose austenitic grade

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

## FAQ

**What is the European equivalent of 310S stainless steel?**
The nearest EN grade is 1.4845, steel name X8CrNi25-21.

**What is the JIS equivalent of 310S stainless steel?**
The nearest Japanese grade is SUS310S.

**What is the Chinese GB equivalent of 310S stainless steel?**
The nearest Chinese GB grade is 06Cr25Ni20.

**Is 1.4845 the same as 310S?**
1.4845 (X8CrNi25-21) is the nearest European equivalent of 310S, 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 310S used for?**
Furnace parts, heat-treatment baskets and fixtures, burner parts, kiln and boiler components.

Source page: https://machinistcharts.com/material/310s-stainless/
Updated: 2026-10-06
Publisher: MachinistCharts (https://machinistcharts.com)