Description
Hastelloy C276 Full Threaded Studs
Hastelloy C276 Full Threaded Studs are high nickel alloy threaded fasteners for demanding corrosive environments. These studs provide excellent resistance to pitting, crevice corrosion and many aggressive chemicals. They are suitable for critical industrial applications.
Technical Overview
Hastelloy C276, UNS N10276, is a nickel-chromium-molybdenum alloy with tungsten. It offers strong resistance to many severe chemical environments. Therefore, C276 threaded studs are used in chemical processing, pollution control, petrochemical and other demanding applications.
Key Features
Excellent Corrosion Resistance
Resists pitting, crevice corrosion and many aggressive chemical media.
High Nickel Alloy
Nickel, chromium, molybdenum and tungsten provide a corrosion-resistant alloy system.
Full Thread Design
Continuous threads provide flexible engagement for flanges, equipment and fabricated assemblies.
Custom Supply
Metric and inch sizes, standard or custom lengths and inspection documents can be supplied.
Chemical Composition - Hastelloy C276
| Element | Requirement, wt. % |
|---|---|
| Nickel (Ni) | Balance |
| Chromium (Cr) | 14.5 - 16.5 |
| Molybdenum (Mo) | 15.0 - 17.0 |
| Iron (Fe) | 4.0 - 7.0 |
| Tungsten (W) | 3.0 - 4.5 |
| Cobalt (Co) | 2.5 max. |
| Carbon (C) | 0.01 max. |
| Manganese (Mn) | 1.0 max. |
| Silicon (Si) | 0.08 max. |
| Vanadium (V) | 0.35 max. |
| Copper (Cu) | 0.50 max. |
Physical Properties - Typical Values
| Property | Typical Value |
|---|---|
| Density | 8.89 g/cm3 |
| Melting Range | Approx. 1325 - 1370 deg. C |
| Modulus of Elasticity | Approx. 205 GPa |
| Poisson Ratio | Approx. 0.31 |
| Thermal Conductivity | Approx. 9.8 W/m.K at 20 deg. C |
| Thermal Expansion | Approx. 12.3 x 10^-6 / deg. C over 20 - 100 deg. C |
Physical properties are typical engineering values and are not acceptance requirements unless specified.
Mechanical Properties - ASTM B574 Grade C276
| Property | Requirement |
|---|---|
| Tensile Strength | 690 MPa min. |
| Yield Strength, 0.2% Offset | 283 MPa min. |
| Elongation | 40% min. |
These values relate to ASTM B574 solution-annealed wrought product requirements. Finished fastener requirements should be confirmed against the specified fastener standard and purchase order.
Stud Dimensions and Specifications
| Item | Specification |
|---|---|
| Stud Type | Full Threaded Studs |
| Material | Hastelloy C276 / UNS N10276 |
| Material Standard | ASTM B574 |
| Metric Thread | Metric coarse or fine thread as specified |
| Inch Thread | UNC / BSW as specified |
| Length | Standard and custom lengths |
| Finish | As manufactured or as specified |
Metric Stud Dimensions and Thread Pitch - M8 to M24
| Size | Coarse Pitch, mm | Fine Pitch, mm |
|---|---|---|
| M8 | 1.25 | 1.00 |
| M10 | 1.50 | 1.00 |
| M12 | 1.75 | 1.50 |
| M16 | 2.00 | 1.50 |
| M20 | 2.50 | 2.00 |
| M24 | 3.00 | 2.00 |
Inch Stud Dimensions and Thread Pitch - 3/8 inch to 1 inch
| Size | UNC Pitch, TPI | BSW Pitch, TPI |
|---|---|---|
| 3/8 inch | 16 | 16 |
| 1/2 inch | 13 | 12 |
| 5/8 inch | 11 | 11 |
| 3/4 inch | 10 | 10 |
| 7/8 inch | 9 | 9 |
| 1 inch | 8 | 8 |
UNC and BSW are different thread systems. Confirm the required thread form before production.
Solution Treatment and Quenching
| Process | Guidance |
|---|---|
| Solution Treatment | Approximately 1120 - 1170 deg. C, as applicable to the specified C276 material and product form. |
| Quenching | Rapid cooling after solution treatment; water quenching is commonly used for this alloy. |
| Purpose | Solution treatment supports the required alloy structure and corrosion resistance. |
Heat treatment must follow the applicable material specification and approved manufacturing procedure.
Applications
Chemical Processing
Process equipment, piping, reactors and components exposed to aggressive chemicals.
Oil and Gas
Selected bolting applications where severe corrosion resistance is required.
Pollution Control
Scrubbers, flue-gas systems and pollution-control equipment.
Industrial Equipment
Heat exchangers, pressure equipment, pumps, valves and fabricated assemblies.
Why Aanuraj
- Specialized supply of stainless steel and high nickel alloy fasteners.
- Hastelloy C276 threaded studs in metric and inch configurations.
- Custom diameters and lengths available against drawing or enquiry.
- Thread inspection and dimensional control for critical requirements.
- Material Test Certificate and inspection documentation available as specified.
- Technical support for material grade, size, thread and application requirements.
SEO Keywords
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Technical Enquiry
Send your required diameter, thread, length, quantity and application. Aanuraj can review the requirement and provide the applicable material and inspection documentation.
Technical reference: ASTM B574 covers wrought nickel alloy rod and bar products including UNS N10276. Finished fastener dimensions, thread standards, mechanical requirements and acceptance criteria should be confirmed against the applicable fastener specification, drawing and purchase order.
