Hastelloy C4 (UNS N06455 / W.Nr. 2.4610) round bar and rod are supplied for thermal stability, fabricability and corrosion resistance for chemical-process equipment exposed to reducing and oxidizing environments. Sasa Alloy reviews dimensions, condition, testing and documentation against the purchase order before quotation.
Final material suitability depends on the process medium, concentration, temperature, stress, fabrication route and governing design code.
Hastelloy C4 Round Bar Specification
| Alloy / UNS |
Hastelloy C4 / UNS N06455 |
| Werkstoff / EN |
2.4610 / NiMo16Cr16Ti |
| Product standard |
ASTM B574 / ASME SB-574 for bar and rod |
| Forms |
Round bar, rod, bright bar, peeled bar, ground bar and cut-to-length pieces |
| Diameter |
Common supply range 6–200 mm; other dimensions subject to mill capability and inquiry |
| Length |
Random or fixed length; cut lengths confirmed against the order |
| Condition |
Hot finished or cold finished, solution annealed, pickled, turned, ground or polished as specified |
| Tolerance |
Diameter, length, straightness and surface requirements according to the purchase specification |
| Documentation |
Mill test certificate, heat-number traceability and inspection documents as ordered |
Available Bar Forms and Processing
| Product form |
Typical processing |
Order information |
| Hot-finished bar |
Hot worked, solution annealed, descaled or turned |
Diameter, machining allowance, surface and inspection |
| Cold-finished bar |
Cold drawn, peeled, ground or polished |
Tolerance, straightness, roughness and end condition |
| Cut pieces |
Sawn or machined blanks |
Cut-length tolerance, marking and piece traceability |
| Forging stock |
Billet or bar for further forging |
Confirm the separate reforging specification; do not assume ASTM B574 applies to every forging stock order |
Equivalent Designations
| Commercial designation |
UNS |
Werkstoff |
EN designation |
| Hastelloy C4 |
N06455 |
2.4610 |
NiMo16Cr16Ti |
Equivalent designations support identification only. The governing product standard, condition and acceptance criteria remain controlling.
Chemical Composition
| Ni |
Cr |
Mo |
Fe |
Co |
C |
Ti |
Si |
| Balance |
14.0–18.0 |
14.0–17.0 |
3.0 max |
2.0 max |
0.010 max |
0.70 max |
0.08 max |
Values are weight percent. Final acceptance is based on the ordered ASTM B574 edition and material test certificate.
Mechanical and Physical Properties
| Property |
Value / requirement |
Purchasing note |
| Tensile strength |
Confirm to ASTM B574 and ordered condition |
Confirm size range, condition and test method on the order |
| 0.2% yield strength |
Confirm to ASTM B574 and ordered condition |
Confirm size range, condition and test method on the order |
| Elongation |
Reported on the material test certificate |
Confirm size range, condition and test method on the order |
| Density |
Approx. 8.64 g/cm³ |
Confirm size range, condition and test method on the order |
Heat Treatment, Machining and Fabrication
| Heat treatment |
Solution treatment and cooling practice must follow the governing material specification and required properties. |
| Machining |
Use rigid tooling, positive feeds and suitable cutting tools for work-hardening nickel alloy. State machining allowance and final surface. |
| Welding |
Use a qualified procedure and compatible filler metal selected for the actual service condition. |
| Cleanliness |
Avoid carbon-steel contamination and use clean handling tools for corrosion-critical or high-purity applications. |
Inspection and Quality Documentation
| Inspection item |
Available scope |
| Material identity |
Heat-number verification and PMI when ordered |
| Chemical and mechanical tests |
Results reported on the material test certificate under the governing standard |
| Dimensions and surface |
Diameter, length, straightness, visual condition and specified surface requirements |
| Nondestructive testing |
Ultrasonic or other inspection subject to size and ordered acceptance criteria |
| Third-party inspection |
Purchaser-appointed inspection can be coordinated when stated before production |
Hastelloy C4 Round Bar Applications
| Industry |
Typical components |
Selection focus |
| Chemical processing |
Agitator shafts, valve stems and reactor internals |
Thermal stability and corrosion resistance |
| Pharmaceutical production |
High-purity process and mixing components |
Clean fabrication and corrosion-resistant service |
| Heat exchangers |
Machined bar components and supports |
Resistance in aggressive process media |
Hastelloy C4 Round Bar Packaging
Bars are protected according to diameter, surface condition, bundle weight, shipment route and customer packing specification. Heat-number and package identification remain linked to the material documentation.
| Bar condition |
Typical protection |
Order confirmation |
| Hot-finished bar |
Strapped bundle, skid or wooden support |
Bundle weight, lifting and end protection |
| Ground / polished bar |
Wrapping or separators with waterproof outer protection |
Surface protection and moisture barrier |
| Cut pieces |
Wooden case with blocking and identification |
Piece count and heat traceability |
Procurement Confirmation
State Hastelloy C4 / UNS N06455, ASTM B574 edition, diameter, length, quantity, condition, tolerance, surface, heat treatment, inspection, marking, packing and certificate requirements. Include the governing design or project specification for code-controlled applications.
