Excel Metal & Engg Industries
Excel Metal & Engg Industries
Girgaon, Mumbai, Maharashtra
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STUD BOLTS ASTM A193 GRADE B7

Stud bolts are threaded rods used in Chemical, Oil and Petrochemical Industries for high pressure flange connections. Flanges are fastened together with the help of stud bolts and nuts. The nuts used in the tightening of flanges are generally of hexagon or heavy hexagon type depending upon the pressure and other piping system requirements. Flange connections are also fastened with traditional solutions like Hex Bolts. Hex bolts are very similar to stud bolts in terms of threading but have a forged hexagon head. However stud bolts are preferred over hex Bolt because during tightening and toque application, studs do not twist.


ASME B16.5 is primarily the dimensional standard for ASTM Stud bolts. This defines the Dimensional requirement primarily i.e. length and the diameter of stud Bolt to be used for the tightening of flanges.Whereas ASME B1.1 defines the threading requirements. Most commonly used thread form is the symmetrical V profile thread with 60 degree angle. ASTM standards define clearly every specific criteria starting from Material grade,Heat treatment,Mechanical & Chemical properties,Stamping,Inspection,acceptance and rejection requirements.The most common grade that we work with is ASTM A 193.We actively manufacture the following grade of stud bolts:


ASTM A193 Grade B7

ASTM A193 Grade B7
  • ASTM A193 Grade B7
  • ASTM A193 Grade B7
  • ASTM A193 Grade B7
  • ASTM A193 Grade B7
  • ASTM A193 Grade B7
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Approx. Price: Rs 50 / PieceGet Latest Price

Product Details:

Minimum Order Quantity1000 Piece
MaterialCarbon Steel
SizeUpto 7 Inch
Fastener TypeStud Bolt
GradeASTM A193 Grade B7
Surface Finishingbare metal finish but are often hot-dip galvanized, zinc plated, Xylan coated, PTFE coated

Grade B7

ASTM A193 Grade B7 bolts and threaded studs are manufactured from a chromium-molybdenum steel and are quenched and tempered (heat treated) to develop the desired mechanical properties (strength). Grade B7 is the most common grade of A193 bolts used in construction. B7 threaded studs and short, headed bolts are readily available in the marketplace. Grade B7 bolts are commonly used in pipe flange connections. These bolts are typically bought and sold in a plain, bare metal finish but are often hot-dip galvanized, zinc plated, Xylan coated, PTFE coated, or otherwise coated for corrosion resistance. Note that coated bolts may not be able to withstand the high temperatures that uncoated B7 bolts can be subjected to.

GradeSizeTensile ksi, minYield, ksi, minElong, %, minRA % minHBWHRC
B7 Up to 2-1/2 125 105 16 50 321 max 35 max
2-5/8 - 4 115 95 16 50
4-1/8 - 7 100 75 18 50

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B7 Threaded Bar

B7 Threaded Bar
  • B7 Threaded Bar
  • B7 Threaded Bar
  • B7 Threaded Bar
  • B7 Threaded Bar
  • B7 Threaded Bar
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Approx. Price: Rs 100 / PieceGet Latest Price

Product Details:

Minimum Order Quantity1000 Piece
MaterialMild Steel
SizeUpto 7 Inch
ShapeThreaded Stud / Rod
Finishingbare metal finish but are often hot-dip galvanized, zinc plated, Xylan coated, PTFE coated
Material GradeASTM A193 Grade B7
Country of OriginMade in India

Grade B7

ASTM A193 Grade B7 bolts and threaded studs are manufactured from a chromium-molybdenum steel and are quenched and tempered (heat treated) to develop the desired mechanical properties (strength). Grade B7 is the most common grade of A193 bolts used in construction. B7 threaded studs and short, headed bolts are readily available in the marketplace. Grade B7 bolts are commonly used in pipe flange connections. These bolts are typically bought and sold in a plain, bare metal finish but are often hot-dip galvanized, zinc plated, Xylan coated, PTFE coated, or otherwise coated for corrosion resistance. Note that coated bolts may not be able to withstand the high temperatures that uncoated B7 bolts can be subjected to.

GradeSizeTensile ksi, minYield, ksi, minElong, %, minRA % minHBWHRC
B7 Up to 2-1/2 125 105 16 50 321 max 35 max
2-5/8 - 4 115 95 16 50
4-1/8 - 7 100 75 18 50

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GI Threaded Rod

GI Threaded Rod
  • GI Threaded Rod
  • GI Threaded Rod
  • GI Threaded Rod
  • GI Threaded Rod
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Approx. Price: Rs 80 / KgGet Latest Price

Product Details:

Country of OriginMade in India

Grade B7

ASTM A193 Grade B7 bolts and threaded studs are manufactured from a chromium-molybdenum steel and are quenched and tempered (heat treated) to develop the desired mechanical properties (strength). Grade B7 is the most common grade of A193 bolts used in construction. B7 threaded studs and short, headed bolts are readily available in the marketplace. Grade B7 bolts are commonly used in pipe flange connections. These bolts are typically bought and sold in a plain, bare metal finish but are often hot-dip galvanized, zinc plated, Xylan coated, PTFE coated, or otherwise coated for corrosion resistance. Note that coated bolts may not be able to withstand the high temperatures that uncoated B7 bolts can be subjected to.

GradeSizeTensile ksi, minYield, ksi, minElong, %, minRA % minHBWHRC
B7 Up to 2-1/2 125 105 16 50 321 max 35 max
2-5/8 - 4 115 95 16 50
4-1/8 - 7 100 75 18 50

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Threaded Studs

Threaded Studs
  • Threaded Studs
  • Threaded Studs
  • Threaded Studs
  • Threaded Studs
  • Threaded Studs
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Approx. Price: Rs 80 / PieceGet Latest Price
Grade B7

ASTM A193 Grade B7 bolts and threaded studs are manufactured from a chromium-molybdenum steel and are quenched and tempered (heat treated) to develop the desired mechanical properties (strength). Grade B7 is the most common grade of A193 bolts used in construction. B7 threaded studs and short, headed bolts are readily available in the marketplace. Grade B7 bolts are commonly used in pipe flange connections. These bolts are typically bought and sold in a plain, bare metal finish but are often hot-dip galvanized, zinc plated, Xylan coated, PTFE coated, or otherwise coated for corrosion resistance. Note that coated bolts may not be able to withstand the high temperatures that uncoated B7 bolts can be subjected to.

GradeSizeTensile ksi, minYield, ksi, minElong, %, minRA % minHBWHRC
B7 Up to 2-1/2 125 105 16 50 321 max 35 max
2-5/8 - 4 115 95 16 50
4-1/8 - 7 100 75 18 50

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Dinesh Chaudhary (General Manager)
Excel Metal & Engg Industries
No. 177/181, JT Building, Dr. M. G. Mahimtura Marg, 3rd Kumbharwada Lane
Girgaon, Mumbai - 400004, Maharashtra, India
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