Hastelloy C4 Round Bar Supplier, Stockist and Exporter
Table of Contents
Aurico Alloys LLP supplies hastelloy c4 round bar (N06455, Werkstoff 2.4610) from ready stock in Mumbai, to customers across India and in more than 40 export markets.
Round bar is the starting stock for machined and forged parts, so straightness, surface condition and through-thickness properties govern how it performs downstream.
Hastelloy C4 holds its structure through the 650-1040°C range, so welded fabrications resist the grain-boundary attack that catches other C-family alloys.
Sizes and Specifications
| Grade | Hastelloy C4 |
|---|---|
| UNS number | N06455 |
| Werkstoff (W.Nr.) | 2.4610 |
| Specifications | ASTM B575 (sheet and plate), B574 (rod, bar and wire), B622 (tube) |
| Size range | Diameter 3 mm to 400 mm in hot rolled, forged, peeled and cold drawn condition, random or cut lengths. |
| Condition and finish | Black, rough turned, peeled and ground, or centreless ground and polished. |
| Certification | EN 10204 3.1 mill test certificate; 3.2 and third-party inspection on request |
Equivalent Grades & Standards
| Property | Value |
|---|---|
| UNS number | N06455 |
| Werkstoff / EN number | 2.4610 |
| EN designation | NiMo16Cr16Ti |
| Density | 8.64 g/cm3 |
| Electrical resistivity | 1.25 µΩ·m |
| Thermal conductivity | 10.1 W/m·°C |
| Coefficient of expansion (24-100 °C) | 10.9 µm/m·°C |
| Specific heat (0 °C) | 406 J/kg·°C |
| Dynamic modulus of elasticity | 212 GPa |
| Rod and bar specification | ASTM B574 |
Identifiers and physical constants for Hastelloy C-4. A dash means no such designation is published for this grade.
Chemical Composition
Nickel balance with 14-18% chromium and 14-17% molybdenum, with iron and tungsten held deliberately low and titanium added for stabilisation.
| Element | Min (%) | Max (%) |
|---|---|---|
| Nickel (Ni) | — | Balance |
| Chromium (Cr) | 14.0 | 18.0 |
| Molybdenum (Mo) | 14.0 | 17.0 |
| Iron (Fe) | — | 3.0 |
| Cobalt (Co) | — | 2.0 |
| Manganese (Mn) | — | 1.0 |
| Titanium (Ti) | — | 0.7 |
| Carbon (C) | — | 0.015 |
| Silicon (Si) | — | 0.08 |
| Phosphorus (P) | — | 0.04 |
| Sulfur (S) | — | 0.03 |
Composition limits for Hastelloy C-4. These are specification limits for the grade, not measured values for a lot; the mill test certificate supplied with your order states the actual analysis.
Mechanical and Physical Properties
Annealed tensile strength around 690 MPa. The restricted iron, cobalt and tungsten give outstanding thermal stability, so it resists sensitisation in the weld heat-affected zone.
Industry Applications
Why this grade
Hastelloy C4 is a nickel-chromium-molybdenum alloy with tungsten removed and iron and cobalt held very low. Its distinguishing property is thermal stability: it resists sensitisation and keeps its ductility after long exposure between roughly 650 and 1040°C, so it suits welded assemblies that sit at intermediate temperature. Its general corrosion resistance is a little below C276.
| Industry | Typical use |
|---|---|
| Chemical processing | Welded vessels and piping in mixed acid service. |
| Pollution control | Scrubber and flue-gas hardware. |
| Pharmaceutical | Reactor and process equipment needing weld stability. |
| Pulp and paper | Bleaching plant equipment. |
| Waste treatment | Acid condensate and incineration hardware. |
Testing and Certification
Every consignment ships with an EN 10204 3.1 mill test certificate stating heat number, chemical analysis and mechanical properties. Depending on the specification we can add positive material identification, ultrasonic and dye-penetrant testing, intergranular corrosion testing to ASTM G28 or A262, and third-party inspection release from Lloyd's Register, Bureau Veritas, SGS or TUV.
Aurico Alloys LLP operates an ISO 9001:2015 quality management system, and can certify material to NACE MR0175 / ISO 15156 for sour service where the grade permits.
Frequently Asked Questions
Request a Quotation
Send your size, quantity and specification and we will come back with price and lead time, usually the same working day. Call +91 7977 88 6611 or email info@auricoalloys.com.