ASTM A193 B16 U-Bolts & J-Bolts

The ASTM A193 B16 U-Bolts and J-Bolts are specialized, bent fasteners critical for supporting and restraining piping systems, particularly those operating at extremely high temperatures (above $850^\circ\text{F}$ or $454∘C) where maintaining dimensional stability is vital. These bent bolts are manufactured from the B16 alloy steel grade, a Chromium-Molybdenum-Vanadium composition specifically chosen for its superior creep resistance—the ability to resist permanent deformation or stretching under sustained load and high heat. U-bolts are shaped like the letter 'U' with threads on both ends, primarily used for clamping pipes to structural members, while J-bolts have a 'J' shape and are often used for anchoring or hanging. Zeron Fasteners manufactures these bent fasteners, ensuring they deliver reliable structural integrity and maintain load-bearing capabilities in the harshest environments, such as those found in thermal power plants and high-pressure steam lines.

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ASTM A193 B16 U-Bolts / J-Bolts Manufacturer in India

ASTM A193 B16 U-Bolts & J-Bolts Chemical Composition

Element Composition (% by Mass)
Carbon (C) 0.37 - 0.49
Manganese (Mn) 0.70 - 1.10
Phosphorus (P) ≤ 0.035
Sulfur (S) ≤ 0.040
Silicon (Si) 0.15 - 0.35
Chromium (Cr) 0.80 - 1.15
Molybdenum (Mo) 0.45 - 0.65
Vanadium (V) 0.25 - 0.35

ASTM A193 B16 U-Bolts & J-Bolts Mechanical Properties

Property Minimum Requirement (Grade B16)
Tensile Strength, min 125 ksi (860 MPa)
Yield Strength, min (0.2% offset) 105 ksi (720 MPa)
Elongation in 2 in. (50 mm), min 18%
Reduction of Area, min 50%
Hardness, max (Brinell) 321 HBW
Hardness, max (Rockwell) 35 HRC

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