SS310 · EN 10095
SS310 is presented here as X8CrNi25-21 (1.4845) under EN 10095. Heat-resisting steel and nickel-alloy flat products for elevated-temperature service.
X8CrNi25-21
EN reference: 1.4845
Data edition: EN 10095:1999
SS310 1.4845
SS310 is presented here as X8CrNi25-21 (1.4845) under EN 10095. Heat-resisting steel and nickel-alloy flat products for elevated-temperature service.
Data edition: EN 10095:1999, Tables 1, 2 and 6. This page lists six selected material references. SS309 and SS310 are shown as EN 1.4833 and 1.4845, associated with 309S and 310S. Incoloy 800H and 800HT are shown against EN 1.4876; the EN chemistry below is the parent-grade envelope, while the commercial variants have additional carbon, aluminium/titanium and grain-size controls. HB values are guidance maxima. The Inconel 601 row is for thicknesses of at least 3 mm.
Related grades
6 material references with EN 10095 data.
SS310 properties
Select a table to compare requirements.
| Element | Mass % |
|---|---|
| C | ≤0.10 |
| Si | ≤1.50 |
| Mn | ≤2.00 |
| P | ≤0.045 |
| S | ≤0.015 |
| Cr | 24.0–26.0 |
| Ni | 19.0–22.0 |
| Mo | — |
| N | ≤0.11 |
| Other elements | — |
Composition is cast analysis in mass %. Values marked ≤ are maxima; paired values are ranges. Ti and Nb expressions use the carbon content by mass. The symbol — means that this table has no limit for that entry.
| Form | Thickness (mm) | Condition | Test direction | Rp0.2 min (MPa) | Rp1.0 min (MPa) | Rm (MPa) | A min, t < 3 mm (%) | A min, t ≥ 3 mm (%) | Other |
|---|---|---|---|---|---|---|---|---|---|
| Flat products | 0.5–75 | +AT | Transverse | 210 | 250 | 500–700 | 33 | 35 | HB ≤192 |
Room-temperature properties from EN 10095:1999 Table 6. A is minimum elongation after fracture for the indicated thickness. Rp0.2 and Rp1.0 are minimum proof strengths; Rm is tensile strength in MPa. +AT = solution annealed; +A = annealed. Maximum Brinell hardness values are guidance values. Flat-product limits are shown separately from bars and rods.
Specification source
Technical data above is identified by its source edition: EN 10095:1999.
Browse all BS EN material specifications
800H / 800HT designation cross-reference: Outokumpu Therma Alloy 800 series, designation table.