Table of Contents
- Hastelloy C4 Round Bars Overview
- Technical Specifications
- Mechanical Properties & Chemical Composition
- Types of Hastelloy C4 Round Bars
- Key Advantages of UNS N06455 Round Bars
- Key Applications of Hastelloy C4 Round Bars
- Quality Testing & Inspection
- Global Export Markets
- Frequently Asked Questions
- Contact Aurum Overseas
Hastelloy C4 Round Bars Supplier & Exporter
Aurum Overseas supplies high-performance Hastelloy C4 Round Bars engineered to eliminate pitting, crevice corrosion, and stress cracking in high-temperature chemical environments. Titanium-stabilized with nickel, chromium, and molybdenum, our C4 bar stock provides superior thermal stability to extend equipment service life.
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As a leading Hastelloy C4 Round Bars Supplier and Exporter, we stock certified ASTM A276 Hastelloy C4 Round Bars, ASTM A479 Hastelloy C4 Round Bars, and UNS N06455 Round Bars with EN 10204 3.1 MTCs. We offer centerless ground bright finishes, heavy forged bars, and custom cut lengths for rapid dispatch.
We export these specialized high-alloy nickel bars across North America (USA, Canada, Mexico), Europe (Germany, UK, France, Italy, Netherlands, Norway), the Middle East (UAE, Saudi Arabia, Qatar, Kuwait, Oman), and Asia-Pacific (Singapore, Malaysia, Australia).
Technical Specifications
| Technical Parameter | Hastelloy C4 |
|---|---|
| Material Designation | Hastelloy C4 / Alloy C4 |
| UNS Number | UNS N06455 |
| Manufacturing Standards | ASTM B574, ASTM A276, ASTM A479, ASME SB574, DIN 17752 |
| Diameter Capability | 3 mm to 500 mm (1/8" to 20" NB) |
| Length Specifications | 3 Meters, 6 Meters, Cut-to-Length |
| Dimensional Tolerances | ISO h8, h9, h10, h11, DIN 1013 |
| Delivery Conditions | Solution Annealed & Water Quenched |
Mechanical Properties & Chemical Composition
Equivalent Grades of Hastelloy C4 Bars
| Standard | Werkstoff Nr. | UNS |
|---|---|---|
| Hastelloy C4 | 2.4610 | N06455 |
Chemical Composition of Hastelloy C4 Round Bars
| Chemical Element | Composition Range (%) |
|---|---|
| Nickel (Ni) | 65.0 min |
| Chromium (Cr) | 14.0 – 18.0 |
| Molybdenum (Mo) | 14.0 – 17.0 |
| Iron (Fe) | 3.0 max |
| Cobalt (Co) | 2.0 max |
| Manganese (Mn) | 1.0 max |
| Titanium (Ti) | 0.7 max |
| Silicon (Si) | 0.08 max |
| Carbon (C) | 0.01 max |
Mechanical Properties of UNS N06455 Round Bars
| Property | Value |
|---|---|
| Ultimate Tensile Strength | 783 MPa min |
| Yield Strength (0.2% Offset) | 365 MPa min |
| Elongation (%) | 55% min |
| Density | 8.64 g/cm³ |
| Melting Range | 1350°C – 1400°C |
Types of Hastelloy C4 Round Bars
Aurum Overseas supplies ASTM B574, ASTM A276 and ASTM A479 Hastelloy C4 Round Bars in precision bright and heavy forged conditions for high-temperature chemical service.
Hastelloy C4 Bright Bars
Hastelloy C4 Forged Bars
Key Advantages of UNS N06455 Round Bars
High Thermal Stability
Titanium stabilization (0.7% max) prevents grain-boundary precipitate formation between 650°C and 1040°C, preserving high ductility and corrosion resistance.
Weld-Zone Integrity
Low carbon and controlled silicon content eliminate intergranular carbide precipitation during welding, maintaining full protection in as-welded heat-affected zones.
Dual Acid Defense
Balanced chromium (14-18%) and molybdenum (14-17%) content protects against both oxidizing and reducing chemical media, preventing unexpected process line failures.
Stress Cracking Immunity
High nickel matrix (65% min) provides exceptional resistance to chloride-induced stress corrosion cracking in hot, contaminated process streams.
Key Applications of Hastelloy C4 Round Bars
| Industry Sector | Typical Components | Operating Conditions |
|---|---|---|
| Chemical Processing | Reactor agitators, distillation shafts, and valve stems | Hot inorganic acids, chloride-contaminated media, and organic synthesis |
| Pickling Operations | Pickling tank tie rods, heating coils, and basket shafts | Boiling sulfuric and hydrochloric acid pickling baths |
| Flue Gas Desulfurization (FGD) | Scrubber fan shafts, damper shafts, and spray nozzles | Hot acidic slurry streams, wet chlorine gas, and sulfur dioxide condensates |
| Agrochemical Manufacturing | Fertilizer synthesis mixing shafts, pump impellers | High-temperature acidic solutions and halide catalysts |
| Waste Treatment | Evaporator rods, hazardous waste disposal shafts | Mixed corrosive waste, severe thermal cycling, and chloride brines |
Quality Testing & Inspection
Every batch of ASTM A479 Hastelloy C4 Round Bars supplied by Aurum Overseas undergoes strict quality testing:
- Positive Material Identification (PMI): XRF testing verifies correct concentrations of nickel, chromium, molybdenum, and titanium.
- Intergranular Corrosion Testing: ASTM G28 Method A testing verifies complete immunity to intergranular attack in heat-affected zones.
- Ultrasonic Volumetric Testing: Ultrasonic examination per ASTM A388 ensures internal soundness free of micro-voids or internal forging bursts.
- Dimensional Inspection: Laser micrometers ensure compliance with tight ISO h8 to h11 limits.
Global Export Markets
As an established Hastelloy C4 Round Bars Exporter, Aurum Overseas supplies fully certified UNS N06455 Round Bars to global energy and chemical engineering centers:
USA
Canada
Mexico
Germany
United
Kingdom
France
Italy
Netherlands
Belgium
Spain
Poland
UAE
Saudi
Arabia
Qatar
Kuwait
Oman
Bahrain
Frequently Asked Questions
Hastelloy C4 features titanium stabilization and modified chemistry that significantly improves thermal stability over C276 during prolonged exposure to temperatures between 650°C and 1040°C.
Yes. Its ultra-low carbon content (0.01% max) and titanium additions prevent intergranular precipitate formation during welding.
They are manufactured in accordance with ASTM B574, ASTM A276, ASTM A479, ASME SB574, and Werkstoff 2.4610 specifications.
We stock standard 3-meter and 6-meter lengths, as well as custom cut-to-length bright and forged round bars from 3 mm to 500 mm in diameter.
Yes. All orders are supplied with full EN 10204 3.1 Mill Test Certificates covering chemical composition, mechanical properties, and heat treatment traceability.
Contact Aurum Overseas
Aurum Overseas provides fully certified Hastelloy C4 Round Bars tailored to critical project specifications.
Contact our sales engineering team for stock availability, custom cut lengths, or immediate price quotes: