Table of Contents
- Hastelloy C276 Hex Bars Overview
- Technical Specifications
- Chemical Composition & Mechanical Properties
- Types of UNS N10276 Hex Bars
- Key Advantages of Hastelloy C276 Hex Bars
- Key Applications of Hastelloy C276 Hex Bars
- Quality Assurance & Inspection
- Global Export Markets
- Frequently Asked Questions
- Contact Aurum Overseas
Hastelloy C276 Hex Bars Overview
Precision cold-drawing and high-temperature solution annealing give Hastelloy C276 Hex Bars exceptional dimensional accuracy and resistance to harsh reducing chemical media. Aurum Overseas is an established Hastelloy C276 Hex Bars Supplier and ASTM B574 UNS N10276 Hex Bars Supplier, delivering high-purity nickel hexagon stock for chemical reactors and process lines.
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As a certified Hastelloy C276 Hex Bars Exporter and ASTM B574 UNS N10276 Hex Bars Exporter, we stock Hastelloy C276 Bright Hex Bars and heavy Hastelloy C276 Forged Hex Bars. Every batch is solution-annealed at 1150 °C to eliminate intergranular corrosion.
We export certified nickel alloy hexagon stock compliant with ASTM B574 standards directly to chemical processing, paper pulp, and waste treatment plants across the USA, UK, Germany, UAE, Saudi Arabia, and global markets.
Technical Specifications
| Technical Parameter | Specification Standard |
|---|---|
| Material Specifications | ASTM B574, ASME SB574, EN 10088-3, DIN 17752 |
| UNS Designation | UNS N10276 |
| Across-Flats (AF) Size Range | 6.0 mm to 100.0 mm (1/4" to 4" Hexagon) |
| Length Options | 1,000 mm to 6,000 mm, Precision Sawing Cut-to-Length |
| Surface Finishes | Cold Drawn, Centerless Ground, Bright Annealed, Hot Forged, Rough Machined |
| Heat Treatment Condition | Solution Annealed (1150 °C / 2100 °F, Rapid Water Quenched) |
| Dimensional Tolerances | ASTM B574 / ISO 286-2 (h9, h10, h11 hex profile tolerances) |
Chemical Composition & Mechanical Properties
Equivalent Standards
| Standard / Grade | Werkstoff Nr. | UNS Designation | EN Symbol | Common Name |
|---|---|---|---|---|
| Hastelloy C276 | 2.4819 | N10276 | NiMo16Cr15W | Alloy C276 |
Chemical Composition (%)
| Element | Specification Range (UNS N10276) |
|---|---|
| Carbon (C) | 0.010 max |
| Manganese (Mn) | 1.00 max |
| Silicon (Si) | 0.08 max |
| Phosphorus (P) | 0.040 max |
| Sulfur (S) | 0.030 max |
| Chromium (Cr) | 14.5 – 16.5 |
| Molybdenum (Mo) | 15.0 – 17.0 |
| Tungsten (W) | 3.0 – 4.5 |
| Cobalt (Co) | 2.5 max |
| Iron (Fe) | 4.0 – 7.0 |
| Vanadium (V) | 0.35 max |
| Nickel (Ni) | Balance (57.0 min) |
Mechanical & Physical Properties
| Property Parameter | Value (Metric / Imperial) |
|---|---|
| Density | 8.89 g/cm³ (0.321 lb/in³) |
| Melting Point | 1370 – 1400 °C (2500 – 2550 °F) |
| Tensile Strength (Min) | 790 MPa (115,000 Psi) |
| Yield Strength (0.2% Offset, Min) | 355 MPa (51,500 Psi) |
| Elongation (Min) | 40 % |
| Hardness (Max) | 220 HBW / 95 HRB |
Types of UNS N10276 Hex Bars
Aurum Overseas supplies Hastelloy C276 (UNS N10276) hex bars in precision bright and heavy forged conditions for severe chemical applications.
ASTM B574 UNS N10276 Bright Hex Bars
ASTM B574 UNS N10276 Forged Hex Bars
Key Advantages of Hastelloy C276 Hex Bars
High Molybdenum Content
High 16% molybdenum matrix provides outstanding protection against severe reducing agents like hydrochloric and hydrofluoric acids.
Resists Chloride Pitting
High PREN prevents localized crevice attack in stagnant environments containing wet chlorine gas or hypochlorite.
Grain Boundary Stability
Ultra-low carbon and silicon levels prevent harmful carbide precipitation in welded heat-affected zones.
High Thermal Stability
Retains mechanical integrity and corrosion resistance across temperatures ranging from cryogenic levels up to 1040 °C.
Key Applications of Hastelloy C276 Hex Bars
| Industry | Applications | Operational Benefit |
|---|---|---|
| Chemical Processing | Reactor vessel tie rods, acid feed pump shafts, mixer bolts | Unmatched resistance to hot, contaminated mineral acid process streams. |
| Paper & Pulp | Bleach plant digester valves, chlorination hex plugs, washer shafts | Resists severe attack from chlorine dioxide and hypochlorite solutions. |
| Waste Treatment | Toxic waste incinerator spray nozzles, scrubber fasteners, valve trim | Resists aggressive localized pitting from hot, acidic combustion gases. |
| Petrochemicals | Sour gas valve stems, heat exchanger plugs, wellhead bolts | Full compliance with NACE standards for high-temperature, high-pressure environments. |
Quality Assurance & Inspection
As a certified ASTM B574 UNS N10276 Hex Bars Exporter, every production heat undergoes thorough inspection to meet international standards:
- Spectro Chemical PMI: 100% XRF chemical verification to confirm exact elemental ratios, including ultra-low carbon limits.
- Corrosion Resistance Testing: Microstructural testing per ASTM G28 Methods A and B to confirm zero intergranular attack.
- Mechanical Property Testing: Full tensile, yield, elongation, and hardness testing according to ASTM B574 specifications.
Global Export Markets
As an established Hastelloy C276 Hex Bars Exporter, Aurum Overseas supplies fully certified UNS N10276 Hex Bars to global chemical processing, pulp & paper, and waste treatment facilities:
USA
Canada
Mexico
Germany
United Kingdom
France
Italy
Netherlands
Belgium
Spain
Poland
UAE
Saudi Arabia
Qatar
Kuwait
Oman
Bahrain
Frequently Asked Questions
Hastelloy C276 contains higher molybdenum (16% vs 13%) for superior resistance in reducing acid environments, whereas C22 has higher chromium (22% vs 16%) for oxidizing environments.
UNS N10276 hex bars are manufactured according to ASTM B574 and ASME SB574 standards for nickel-alloy rod and bar stock.
Hexagon profiles provide pre-formed parallel flat faces, eliminating extra machining steps when producing high-torque bolts, valve stems, and plugs.
Yes, UNS N10276 complies with NACE MR0175/ISO 15156, making it suitable for sour oil and gas applications.
All shipments from Aurum Overseas include certified EN 10204 3.1 Mill Test Certificates detailing heat chemistry, mechanical results, and test reports.
Contact Aurum Overseas
Partner with a trusted Hastelloy C276 Hex Bars Supplier and global ASTM B574 UNS N10276 Hex Bars Exporter for certified alloy stock, custom cut-to-length sawing, and rapid international delivery.