Incoloy 800H · EN 10302
Incoloy 800H is presented here as X5NiCrAlTi31-20 (1.4958) under EN 10302. Creep-resisting steel and nickel-alloy flat products for service under sustained high-temperature stress. The standard excludes aerospace and pressure-purpose specifications.
X5NiCrAlTi31-20
EN reference: 1.4958
Data edition: EN 10302:2008
Incoloy 800H 1.4958
Incoloy 800H is presented here as X5NiCrAlTi31-20 (1.4958) under EN 10302. Creep-resisting steel and nickel-alloy flat products for service under sustained high-temperature stress. The standard excludes aerospace and pressure-purpose specifications.
Data edition: EN 10302:2008, Tables 1, 2, 7 and 8. Selected flat-product rows at 3–20 mm are shown. For nickel-alloy flat products below 3 mm, the Table 8 elongation minima are five percentage points lower. The 800H and 800HT entries identify EN 1.4958 and 1.4959; trade-name chemistry and heat-treatment restrictions can be narrower than the EN grade.
Related grades
4 material references with EN 10302 data.
Incoloy 800H properties
Select a table to compare requirements.
| Element | Mass % |
|---|---|
| C | 0.03–0.08 |
| Si | ≤0.70 |
| Mn | ≤1.50 |
| P | ≤0.015 |
| S | ≤0.010 |
| Cr | 19.0–22.0 |
| Ni | 30.0–32.5 |
| Mo | — |
| N | ≤0.030 |
| Other elements | Al: 0.20–0.50; Ti: 0.20–0.50; Cu ≤0.50; Nb ≤0.10; Co ≤0.50 |
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) | A80 min (%) | A min (%) | Other |
|---|---|---|---|---|---|---|---|---|---|
| Flat products | 3–20 | +AT | Transverse | 170 | — | 500–750 | — | 30 | — |
| Flat products | 3–20 | +RA | Transverse | 210 | — | 500–750 | — | 30 | — |
Room-temperature properties. Rp0.2 and Rp1.0 are minimum proof strengths; Rm is tensile strength. A80 applies below 3 mm thickness; A applies from 3 mm using a proportional gauge length of 5.65√S₀. +AT = solution annealed; +A = annealed; +RA = recrystallization annealed; +P = precipitation hardened. Strength is in MPa (N/mm²).
Specification source
Technical data above is identified by its source edition: EN 10302:2008.