Why ASTM B994 is the World’s Best Bolting Solution


  • With the industry in search of better methods to protect fasteners from failure, ASTM B994 offers a novel solution to corrosion resistance in bolting operations. Suggesting a Nickel-Cobalt alloy as the new practice for fastener electroplating, ASTM B994 is designed to improve a manufacturer’s control of the production process. The standard requires new, more rigorous testing practices to improve worker safety and reduce the long-term costs of bolting.

    How ASTM B994 Makes Bolting Consistent, Safe, and Traceable

    Using a controlled electroplating process, ASTM B994 bolting systems achieve a consistent coating thickness throughout each fastener that does not require undersizing or overtapping nuts and studs. Nickel-Cobalt does not generate hydrogen in its reduction process and acts as a barrier to environmental sources of hydrogen, greatly reducing the risk of hydrogen embrittlement. Its low coefficient of friction makes ASTM B994 bolting easier to torque, helps prevent galling, and provides a consistent k-factor which allows maintenance teams to more easily apply the proper torque for the job. Most importantly, ASTM B994 Nickel-Cobalt plating resists corrosion and maintains proper thread engagement longer than any other fastener coating on the market.<

    ASTM B994 specifies four service conditions that relate to coating thickness, measured in micrometers (μm), and references rigorous testing practices required by four testing classes to evaluate bolting performance. Chief among these testing requirements is the galling test, or Fastener End of Life Test (FELT), a new lab test that is designed to better simulate a fastener’s real world environment. In the galling test, bolts from a production batch are placed under tension and subjected to harsh environments that simulate their real world applications. Samples are then opened periodically to check their condition. If the fasteners still turn, the company knows that bolts in the field are still performing. To comply with the ASTM B994 Class 1 testing tier, a fastener company must perform this test every 120 days for a minimum of two years.

    ASTM B994 also helps bolting companies comply with API 20E specifications, making sure that facilities are up to the challenges of today’s bolting environment. As one tool to help maintain bolt integrity through API 20E, ASTM B994 suggests a system that allows bolts to be traced to their origins even while the bolts are in use. When coupled with the revolutionary ASTM B994 galling test, this allows facilities to anticipate when their bolting will fail so they can replace bolts with ease and prevent costly, dangerous procedures such as hot bolting/single stud replacement.

    The Doxsteel Difference

    At Doxsteel Fasteners, we are fully committed to bolting production using ASTM B994 Nickel-Cobalt plating. ASTM B994 promises to revolutionize bolt theory and practice in the oil and gas industry by saving time, money, and lives. As bolting requirements demand innovations in response to the challenges of today’s industry, ASTM B994 stands ready to offer unparalleled bolting protection and traceability. Every Doxsteel Fastener is backed by a five year no seize warranty, and is expected to maintain viable thread engagement far beyond the life of its guarantee.

    Are you ready to make the switch to ASTM B994 bolting? Contact Doxsteel today to learn more.