An engineered high temperature resistant steelButton Head

Alloy 330 button head cap screws 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 button head cap screws 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 Button Head Cap Screws

  • Alloy 330 screws 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 button head cap screws.
  • Because of its resistance to nitrogen rich environments, alloy 330 screws 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

Alloy 330 Screw Types 12 Point Screws, Button Head Cap ScrewsFlat Head ScrewsHex Head Cap ScrewsPan Head ScrewsSet ScrewsSocket Head Cap ScrewsTamper Resistant Security Screws, Torx Screws, Vented Screws


Alloy 330 Button Head Cap Screw Features & Benefits

Alloy 330 button head cap screws combine the similar shape of a pan head with the driver of a socket head. The socket driver is ideal for low clearance applications that require a large area clamping face. Compared to a standard socket head cap screw, alloy 330 button heads have a lower and wider profile. This can be useful when the clamping material is too thin to counter-bore.

Advantages

  • Wide bearing surface for clamping
  • Low profile head

 


330 Tensile Curve


Alloy 330 Chemistry and Specifications

Alloy 330 (UNS N08330) is best known for its extreme high temperature strength and stability. One of the most unique attributes of Alloy 330 is its ability to handle cyclic temperature changes from extreme high temperatures to cooling phases, as well as in oxidation-rich environements.

Alloy 330 Specifications: UNS N08330, AMS 5592, AMS 5716, ASME SB 511, ASME SB 536,  ASTM B 511, ASTM B 512, ASTM B 535, ASTM B 536, ASTM B 546, ASTM B 710, ASTM B 739, EN 10095, Werkstoff 1.4886

Alloy 330 chemical composition

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