Learn about ASTM Material Grades used to manufactured Bolting Material such as Stud, Bolt, Nut and Washers

1. Bolting
Material
Wiki Common user: Alexander AlUS
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2. Material of construction
• Carbon steel
• Low alloy steel
• Stainless steel
• Exotic material, such as Monel, Inconel, Nickel alloy
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3. Material of construction
• These material further divide in
− High Strength
− Intermediate strength
− Low Strength
• List of ASTM Material grade used for manufacturing
stud are given in ASME B16.5
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4. Materials for Stud & Bolt
• Common material grade used are
• ASTM A193 Gr B7, B7M, B5, B8 etc.
• ASTM A320 Gr L7,L7A,L7B etc.
• ASTM A354 Gr BC, BD etc..
• ASTM A540 Gr B21 to B24
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5. Materials for Nut
• Nuts may be machined from the same material as
stud or may be of a compatible grade of ASTM A194
• ASTM A194 list the material grades which suit
various stud materials
• ASTM A194 Gr 2,2H,2HM,8,8M
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6. Materials for Washers
• Common material grade used are
• ASTM F436,ASTM F844, ASTM F959
• If not specified it can be manufactured from any
compatible grade material
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7. Coating
• Bolting are also coated with different materials to
improve its corrosion resistance and reduce
maintenance
− Chrome plated
− Galvanized
− Xylan coated
− PTFE coated
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8. What you have learned?
• Materials for Stud, Bolt, Nut
&washers
• Different type of coating
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9. See you
in the next lecture…
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