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Power gen bolting

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The LoneStar Group manufactures and supplies precision-engineered fasteners and bolts for power generation and critical industries. All our approved and accredited components are designed to withstand extreme temperatures, pressures and cyclic stresses.

We strengthen the world’s most demanding assets and applications

The LoneStar Group manufactures and supplies a broad range of precision-engineered, high-performance bolts and fasteners specially engineered to strengthen the full scope of power generation assets and applications. Our approved and accredited component list covers, but is not limited to:

  • Hexagon bolts and setscrews
  • 12-point ferry cap screws and nuts
  • Engineered studs
  • Reduced shank studs
  • Rotor studs and nuts
  • Stud bolts
  • Tie bars
  • Socket screw products
  • Wire locking inserts
  • Cap nuts
  • Machined OEM parts
  • Bespoke fasteners and bolting

These market-leading components are trusted by our critical-industry partners to strengthen:

  • Gas-fired power plants
  • Nuclear power plants
  • Gas and steam turbine
  • Renewable energy projects
  • Boilers 
  • Piping systems 
  • Heat exchangers 
  • Condensers 
  • Generators 
  • Balance of plant (BOP) – valves, pumps, fans, coal mills

Securing a global reputation

Our market-leading components are engineered to perform with ultimate precision and reliability within the world’s most demanding energy settings.

Power gen bolts are used to

– Clamp casing halves together. – Hold nozzles, diaphragms or end covers. – Secure rotor assemblies. – Attach bearing housings and flanges. 

Our components withstand

– High-stress environments. – Temperatures between 350°C–700°C. – Pressures from tens to thousands of bar. – Long-term creep and fatigue loads.

Materials used for low- to medium-temperature steam turbines (≤ 450°C)

Alloy steel (Cr-Mo-V, Ni-Cr-Mo types): 

  • ASTM A193 Grade B16
  • 34CrNiMo6
  • 25CrMo4, 42CrMo4 
  • AISI 4140 / 4340
  • Properties: high strength, good toughness, moderate temperature resistance.

Materials used for high-temperature steam and gas turbines (450–700°C).

Creep-resistant alloy steels: 

  • Durehete 1055
  • 21CrMoV5-7
  • X19CrMoNbVN11-1 
  • X22CrMoV12.1

Nickel-based alloys (for extreme heat zones): 

  • Inconel 718 (UNS N07718)
  • Nimonic 80A 
  • A286 (1.4980 / ASTM A453 Grade 660) 
  • 422 st (UNS S42200)
  • Properties: exceptional creep, oxidation, and fatigue resistance.

Contact our power gen bolting experts to discuss your requirements.

We look forward to collaborating with you.

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