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 shoulder bolt features and benefits
• Datasheet for Alloy 330

Alloy 330 shoulder 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 shoulder 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 Shoulder Bolts

• Alloy 330 shoulder 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 shoulder bolts.
• Because of its resistance to nitrogen rich environments, alloy 330 bolts are used extensively for components handling cracked ammonia.

Resources: Alloy 330 Torque Specs

Duplex Bolt Types: Hex Head Bolt, Shoulder Bolt

Alloy 330 Shoulder Bolt Features and Benefits

Alloy 330 shoulder bolts, also called stripper bolts are a unique fastener with three main parts: head, shoulder, and thread. The head has the largest diameter and is where the torque is applied, typically with a socket driver. The shoulder is smooth and unthreaded, and has a set diameter and length. The shoulder’s role is to act as a shaft or dowel for rotating parts, axles for rolling parts, guides for sliding elements, and pivot points. The final part of an alloy 330 shoulder bolt is the threaded shaft. The threaded portion of a shoulder bolt has a major diameter slightly smaller than the shoulder diameter. 

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