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ASTM A540 Grade B21

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ASTM A540 defines mechanical and chemical requirements for bolts, studs, and other fasteners used in high-temperature and high-pressure environments, critical service applications and where creep resistance and stress rupture strength are important

Description of Material

ASTM A540 grade B21 is a special quality alloy steel used for oil and gas, nuclear and other special heavy engineering applications. The material is quenched, tempered, and fully tested to meet the characteristics of the required class (1 to 5) to suit the application requirement.
LoneStar can offer this grade in the standard form or with supplementary testing requirements as detailed in ASTM A540.

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ASTM A540 B21

LoneStar Manufactures
Studbolts
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Studding
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Hexagon Headed Bolting
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Socket Headed Bolting
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Double Ended and Waisted Studs
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Associated OEM Parts
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Imperial Nuts – Heavy and Normal Series – Including ANSI B18.2.2
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Metric Nuts – Regular and High types – Including DIN 934 H=D, ISO
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Available with locking features
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Similar or Equivalent Standards

  • AISI 4140
  • ASTM A193 B16

Applications

  • Pressure vessels
  • Heat exchangers
  • Steam turbines
  • Compressors
  • Critical piping flanges

Disclaimer

All information is for illustrutive purposes only.
LoneStar Group accepts no responsibility for the accuracy of data contained within or the use of any of the data by other parties. Properties do vary with the size and condition of the material.

Get in touch

For detailed product information or custom pricing, please reach out to LoneStar to discuss your project requirements and receive a tailored quotation.

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