An engineered high temperature resistant steel
Excellent high temperature stability and strength
Very oxidation and carburization resistant to 2100°F
Good resistance to thermal shock and quenching
Chemistry and specifications of alloy 330
Alloy 330 hex head bolt features and benefits
Datasheet for Alloy 330
Alloy 330 hex head bolts are specifically designed for high temperature furnace applications such as vacuum furnaces, heat treating and brazing applications. The most prized trait of alloy 330 is its ability perform under cyclic conditions of temperature extremes from heating and cooling; as well as in alternate carburizing and oxidizing atmospheres. An austenitic, nickel-chromium-iron-silicon alloy, 330 hex head bolts also offer industry a low coefficient of expansion, excellent ductility, and high strength.
Benefits & Corrosion Resistance
Resistance to thermal shock from repeated quenching
High level of resistance to oxidation and carburization
Ability to handle thermal cycling
Provides resistance to scale formation up to about 2000°F
Good resistance to nitrogen-containing atmospheres where the oxygen content is low
High nickel content of 34-37% provides high resistance to chloride stress corrosion cracking and embrittlement
Applications for Alloy 330 Hex Head Bolts
Alloy 330 hex bolts are often used in furnaces, thermal processing and heat treating applications.
Gas turbine components and boiler fixtures used in power generation often use Alloy 330 hex head bolts.
Because of its resistance to nitrogen rich environments, alloy 330 hex bolts are used extensively for components handling cracked ammonia.
| Alloy 330 Properties | |
| Tensile Strength (ksi) | 80-85 |
| Yield Strength (ksi) | 30-43 |
| Elongation in 2” | 40-45 |
| Rockwell B Hardness | 70-85 |
| Density (lb/in3) | 0.292 |
| Specific Heat (Btu/lb/°F (32°-212°F) | 0.11 |
| Modulus of Elasticity Tension | 28.5 |
Resources: Alloy 330 Torque Specs
Duplex Bolt Types: Hex Head Bolt, Shoulder Bolt
Alloy 330 Hex Head Bolt Features and Benefits
It is important to differentiate between a alloy 330 hex head bolt and hex head cap screw. Often people assume they are the same, but they are actually very different fasteners in terms of how they are manufactured, as well as from an application perspective. Regardless of your choice, alloy 330 hex heads offer strong, stable joints because of their large head service.
The Hex Comparison
Hex Head Bolts | Hex Head Cap Screw |
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