ASTM A193 Grade B7 Stud Bolt

The ASTM A193 Grade B7 Stud Bolt is an essential high-strength fastener, typically supplied as a continuously threaded rod or a double-end stud, explicitly designed for high-temperature and high-pressure applications. Manufactured from heat-treated chromium-molybdenum alloy steel, it is the industry standard for bolting flanges in the oil and gas, petrochemical, and power generation sectors. It offers exceptional tensile strength and creep resistance, making it suitable for temperatures up to 1000°F (538°C). This stud is invariably paired with compatible high-temperature nuts, most commonly the ASTM A194 Grade 2H or Grade 7 Hex Nut. Zeron Fasteners is recognized as a premier manufacturer and reliable supplier of these critical alloy steel studs in India, ensuring compliance with strict industry standards.

Related Products

Heavy Hex Nuts (A194 Gr. 7) Heavy Hex Nuts (A194 Gr. 2H) Threaded Rods (A320 L7) Stud Bolts (A193 B8M) Stud Bolts (S32750) Washers (A194 Gr. 7)
ASTM A193 Grade B7 Stud Bolt Manufacturer in India

ASTM A194 Grade 7 Heavy Hex Nuts Chemical Composition

Element Composition (% maximum, unless a range is given)
Carbon (C) 0.37% to 0.49%
Manganese (Mn) 0.65% to 1.10%
Phosphorus (P), max 0.040%
Sulfur (S), max 0.040%
Silicon (Si) 0.15% to 0.35%
Chromium (Cr) 0.75% to 1.20%
Molybdenum (Mo) 0.15% to 0.25%

ASTM A194 Grade 7 Heavy Hex Nuts Mechanical Properties

Property Requirement (for all sizes)
Material Medium Carbon Alloy Steel, Quenched and Tempered
Minimum Tempering Temperature 1100 °F (595 °C)
Proof Load Stress, min 175 ksi (Heavy Hex)
Hardness (Brinell, BHN) 248 to 327
Hardness (Rockwell, HRC) 24 to 35

Features Product

Blind Flanges (A194 Gr. 7) Hex Bolts (SS 304) Weld Neck Flanges (S32760) Socket Weld Flanges (Hastelloy B2)

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