What Are ASTM A453 Grade 660 Class D Bolts?

ASTM A453 Grade 660 Class D bolts are high-temperature, corrosion-resistant fasteners commonly used in the petrochemical and power generation industries. These bolts are made from a nickel-chromium alloy, which gives them excellent strength and resistance to oxidation at high temperatures.

The “Class D” designation refers to the material condition of the bolts. Class D bolts undergo a heat treatment process that involves heating the bolts to a specific temperature and holding them at that temperature for a specific amount of time.

Applications for ASTM A453 Grade 660 Class D Bolts

ASTM A453 Grade 660 Class D Bolts The primary application for these bolts is in flanges used in the oil and gas industry, where reliable performance is essential. These bolts are commonly used on power equipment such as gas turbines and diesel engines because of their excellent corrosion resistance, even in extreme conditions. In addition, they are suitable for use in marine engineering due to their excellent tensile strength and temperature resistance properties.

Advantages of ASTM A453 Grade 660 Class D Bolt

These bolts offer several advantages over other fasteners, including excellent tensile strength and temperature resistance that make them ideal for use in harsh environments such as oil rigs or offshore platforms. Additionally, these bolts are highly corrosion resistant, which makes them well suited for use in marine applications where salt water can cause rapid corrosion on other types of metal fasteners. Finally, these bolts have good creep resistance, which means they maintain strength under long-term exposure to elevated temperatures.