• Bolt Fasteners
  • Bolt Fasteners
  • Bolt Fasteners

Bolt Fasteners

Jaipur, Rajasthan, India

INR199.00

Date : August 24, 2022
Brand : Generic
Model no : na

Description

Bolt Fasteners

APPLICATIONS/ ADVANTAGES B7 Bolts are best suited for use in temperatures between 300° – 400° C.
MATERIAL Bolts shall be made from a grade B7 alloy which conforms to the following chemical composition requirements–
Carbon: 0.37-0.49%; Manganese: 0.65-1.10%; Phosphorus: 0.035% max; Sulfur: 0.040% max; Silicon: 0.15-0.35% ; Chromium: 0.75-1.20% ;Molybdenum: 0.15-0.25%
HEAT TREATMENT Immediately after rolling or forging, the studs are cooled to a temperature below the cooling transformation stage. Parts are then hardened by heating to a temperature of 870°C and oil quenched then it is reheated to a minimum tempering temperature of 593°C and cooled in still air.
HARDNESS Rockwell C35 maximum
YIELD STRENGTH Studs 2.5” in diameter and smaller: 105,000 psi. minimum
TENSILE STRENGTH Studs 2.5” in diameter and smaller: 125,000 psi. minimum
ELONGATION IN 4D 16% minimum
REDUCTION OF AREA 50% minimum
PLATING Studs are typically provided plain without a secondary finish or as per requirement
APPLICATIONS/ ADVANTAGES B16 is one of the most common fasteners specs for heavy industry like petroleum and chemical industries and in High temperature pressure flange joints
MATERIAL Bolts shall be made from a grade B16 alloy which conforms to the following chemical composition requirements–Carbon: 0.36-0.47%; Manganese: 0.45-0.70%; Phosphorus: 0.035% max; Sulfur: 0.040% max; Silicon: 0.15-0.35%; Chromium: 0.8-1.15%; Molybdenum: 0.50-0.65%; Vanadium: 0.25-0.35%; Aluminum 0.015% max
HEAT TREATMENT Immediately after rolling or forging, the studs are cooled to a temperature below the cooling transformation stage. Parts are then hardened by heating to a temperature of 940°C and oil quenched then it is reheated to a minimum tempering temperature of 650°C and cooled in still air.
HARDNESS Rockwell C35 maximum.
YIELD STRENGTH Studs 2.5” in diameter and smaller: 105,000 psi. minimum
TENSILE STRENGTH Studs 2.5” in diameter and smaller: 125,000 psi. minimum
ELONGATION IN 4D 18% minimum
REDUCTION OF AREA 50% minimum
PLATING Studs are typically provided plain without a secondary finish or as per requirement

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