Material documents
EN 10204 3.1 documentation and the required test scope can be included in the agreed order requirements.
Learn more →UNS N08810 · Material No. 1.4958³
An iron-nickel-chromium alloy considered where high-temperature creep and rupture requirements govern. State duration, metal temperature and atmosphere.
Chemical composition
| Element | Weight % |
|---|---|
| Ni | 30–35 |
| Cr | 19–23 |
| Fe | ≥39.5 |
| C | 0.05–0.10 |
| Al | 0.15–0.60 |
| Ti | 0.15–0.60 |
| Al + Ti | 0.30–1.20 |
Selected elements are shown. Agree the complete chemistry and limits in the purchase specification; actual heat analysis belongs in the material report.
Mechanical properties
Solution-annealed rod / bar ≤160 mm; VDM table 5 / VdTÜV 412 basis
| Rp0.2 · MPa | Rm · MPa | A · % |
|---|---|---|
| ≥170 | 450–700 | ≥30 |
Reference data for the stated form and condition, not a guarantee for every shipment. Agree order minima, test conditions and sample orientation separately.
Physical properties
| Property | Value |
|---|---|
| Density | 7.94 g/cm³ |
| Melting range | 1357–1385 °C |
The melting range is not an allowable service-temperature range.
Product forms & reference standards
| Form | Reference document |
|---|---|
| Bar | ASTM B408 / ASME SB408 |
| Seamless tube / pipe | ASTM B407 / ASME SB407 |
| Plate / sheet / strip | ASTM B409 / ASME SB409 |
| Forgings | ASTM B564 / ASME SB564 |
Numbers are reference pointers from official sources, not claims of current-edition compliance or certification. Specify the required edition, condition and project requirements. Dimensions, supply feasibility and lead time are confirmed in the quotation.
What to specify before ordering
Keep 800, 800H and 800HT separate. Carbon, Al/Ti controls, grain size and heat treatment must follow the specified document; a melting range is not an operating-temperature limit.
- Grade and exact specification, including the required edition.
- Form, dimensions, tolerances, quantity and supply condition.
- Tests, certificate type and traceability requirements.
- Delivery destination and required date.
Sources & data basis
Mechanical row: VDM Alloy 800 H/HP, May 2026, table 5; not a universal ASTM minimum. Chemistry/physical values: Special Metals tables 1–2. ³VDM lists 1.4958 and legacy 1.4876; confirm exact designation.
Official technical reference ↗
Reviewed 19 October 2026. No Russian-grade equivalence is asserted. INCONEL, INCOLOY and MONEL are Special Metals group trademarks; HASTELLOY is a Haynes International trademark. References do not imply endorsement of Hangbo.
Heat traceability
Identify the heat number, product condition and marking requirements before material is cut or processed.
Learn more →Inspection & certificates
Review certificate scope and validity; agree PMI, additional testing or third-party inspection where required.
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