Haynes® 556 Plates (UNS R30556, ASTM B435) are an iron-nickel-chromium-cobalt alloy built for elevated-temperature service where sulfidizing, carburizing and chlorine-bearing atmospheres would attack a conventional stainless or nickel plate. Waste incineration grates, chemical process fixtures and high-temperature process equipment are the typical destination for this grade in plate form.
Table of Contents
556 combines effective resistance to sulfidizing, carburizing and chlorine-bearing environments with good strength and oxidation resistance at high temperature - a combination that lets it stand in for both a corrosion-resistant and a heat-resistant grade in the same application, where a plant might otherwise need to choose between the two.
Aurico Alloys LLP supplies Haynes® 556 plates to ASTM B435 and AMS 5874, with full material test certificates to EN 10204 3.1, for chemical processing, waste-to-energy and general high-temperature industrial use.
High-quality Haynes® 556 Plates ready for industrial use.
Specification Overview
| Supplier | Aurico Alloys LLP - Haynes 556 plates supplier/exporter |
|---|---|
| Grade | Haynes® 556 (UNS R30556) |
| Standards | ASTM B435, AMS 5874 (sheet, plate and strip) |
| Thickness Range | 4.75 mm – 150 mm |
| Finish | Hot rolled, solution annealed and descaled, per specification |
| Delivery | Stock and indent, cut to size, MTC EN 10204 3.1, export ready |
Equivalent Grades & Standards
| Property | Value |
|---|---|
| UNS number | R30556 |
| Werkstoff / EN number | 1.4883 |
| EN designation | X10CrNiCoMoN22-20-18 |
| Density | 8.23 g/cm3 |
| Melting range | 1330-1415 °C |
| Plate, sheet and strip specification | ASTM B435 / AMS 5874 |
Identifiers and physical constants for Haynes 556. A dash means no such designation is published for this grade.
Stock & Product Availability
Aurico Alloys LLP supplies Haynes® 556 plates to chemical processing and waste-to-energy equipment fabricators across India and abroad, with full traceability and MTC EN 10204 3.1 on every order.
Chemical Composition
| Element | Min (%) | Max (%) |
|---|---|---|
| Iron (Fe) | — | Balance |
| Nickel (Ni) | 20 nominal | |
| Cobalt (Co) | 18 nominal | |
| Chromium (Cr) | 22 nominal | |
| Molybdenum (Mo) | 3 nominal | |
| Tungsten (W) | 2.5 nominal | |
| Tantalum (Ta) | 0.6 nominal | |
| Nitrogen (N) | 0.2 nominal | |
| Silicon (Si) | 0.4 nominal | |
| Niobium (Nb) | — | 0.3 |
| Manganese (Mn) | 1 nominal | |
| Aluminium (Al) | 0.2 nominal | |
| Carbon (C) | 0.1 nominal | |
| Boron (B) | — | 0.02 |
| Lanthanum (La) | 0.02 nominal | |
| Zirconium (Zr) | 0.02 nominal | |
Composition for Haynes 556. Figures given as a range or a maximum are limits and those marked nominal are not; none of them are measured values for a lot; the mill test certificate supplied with your order states the actual analysis.
Mechanical Properties
| Property | Typical Value |
|---|---|
| Tensile Strength, annealed, room temperature | ~793 MPa (115 ksi) |
Sourced from Haynes International's published 556 data; density and melting range are in the Equivalent Grades table above. Yield strength and elongation were not available from the sources checked for this page and are not stated rather than estimated.
Applications
- Chemical Processing: Process equipment and fixtures exposed to sulfidizing, carburizing or chlorine-bearing atmospheres at high temperature.
- Waste-to-Energy: Incinerator grates and components in mixed corrosive/high-temperature service.
- General High-Temperature: Furnace and process fixtures where both corrosion and oxidation resistance are needed from a single grade.
FAQ
Global Export Destinations
We ship worldwide from Mumbai. See every destination we export to on our export markets page.
Domestic Supply Network
We deliver across India from our Mumbai stockyard. See every city we supply on our supply locations page.
Conclusion
Haynes® 556 plates from Aurico Alloys LLP bring together corrosion resistance and high-temperature strength for chemical processing and waste-to-energy applications, backed by ASTM B435 / AMS 5874 certification and MTC EN 10204 3.1 traceability. Talk to us about your requirement and we will confirm thickness, condition and lead time against the current mill programme.