ASTM A193 B7 U-Bolts and J-Bolts

ASTM A193 B7 U-Bolts and J-Bolts are specialized, bent forms of alloy steel fasteners manufactured from the same high-strength, heat-treated $\text{AISI 4140}$ material used for $\text{B7}$ studs. U-Bolts are shaped like the letter 'U' with threads on both ends, primarily used as clamps for supporting piping or securing cables and structural members. J-Bolts are shaped like the letter 'J' with a threaded end and a curved, non-threaded hook end, typically used for anchoring into concrete or masonry. Zeron Fasteners supplies these robust $\text{B7}$ components, ensuring they maintain the high tensile strength and temperature stability required for critical applications in petrochemical plants, refineries, and power generation facilities.

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ASTM A193 B7 U-Bolts / J-Bolts Manufacturer in India

ASTM A193 B7 U-Bolts and J-Bolts Chemical Composition

Specification Element Composition (%)
ASTM A193 B7 (AISI 4140 Alloy Steel) Carbon (C) 0.38 - 0.48
Manganese (Mn) 0.75 - 1.00
Phosphorus (P) Max 0.035
Sulfur (S) Max 0.040
Chromium (Cr) 0.80 - 1.10
Molybdenum (Mo) 0.15 - 0.25

ASTM A193 B7 U-Bolts and J-Bolts Mechanical Properties

Specification Property Value
ASTM A193 B7 (Diameter ≤ 4"$) Tensile Strength, min 125 ksi (860 MPa)
Yield Strength, min 105 ksi (725 MPa)
Hardness 248 - 321 HBW (23 - 35 HRC)
Bent Fasteners Application Minimum Bending Radius Dependent on Rod Diameter
Required Nut Grade ASTM A194 Grade 2H

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