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B7 All Thread Rod
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B7 All Thread Rod

B7 All Thread Rod

ASTM A193 Grade B7 all thread rod is manufactured from an alloy which includes chromium-molybdenum steel, quenched and tempered, for added strength and corrosion resistance. All thread rod listed below is melted and manufactured in the USA where specified domestic. Dimensional specifications are governed by ASME B18.31.3. Inch series fasteners meeting ASTM A193 Grade B7 specifications are typically used in flange bolting applications. ASTM A193 covers the requirements for high temperature and high pressure bolting.

Governing StandardsGrade B7

ASTM A193 Covers alloy and stainless steel bolting materials and bolting components for pressure vessels, valves, flanges, and fittings for high temperature or high pressure service, or other special purpose applications.
ASME B18.31.3 Covers the general and dimensional data for inch series threaded rods.
ASME B1.1 UNC & UNF Class 2A Specifies the thread form, series, class, allowance, tolerance, and designation for unified screw threads.

Mechanical PropertiesGrade B7

Alloy Steel, Quenched & Tempered Per ASTM A193/A193M-16
Diameter Tempering
Temperature		 Tensile
Strength		 Yield Strength,
0.2% offset		 Elongation
in 4D		 Reduction
of Area		 Hardness
Min Min ksi Min ksi Min % Min % Max
2 1/2" and under 1100F 125 105 16 50 321 HBW or 35 HRC
over 2 1/2 to 4" 1100F 115 95 16 50 321 HBW or 35 HRC
over 4 to 7" 1100F 100 75 18 50 321 HBW or 35 HRC

Chemical PropertiesGrade B7

Per ASTM A193/A193M-16
Grade Carbon Manganese Phosphorus Sulfur Silicon Chromium Molybdenum
% by weight % by weight % by weight % by weight % by weight % by weight % by weight
B7 0.38-0.48 (1) 0.75-1.00 0.035 max 0.040 max 0.15-0.35 0.80-1.10 0.15-0.25
  1. 1. For bar sizes over 3 1⁄2 in. [90 mm], inclusive, the carbon content may be 0.50% max. For the B7M grade, a minimum carbon of 0.28% is permitted, provided that the required tensile properties are met in the section sizes involved, the use of AISI 4130 or 4130H is allowed.
B7 All Thread Rod
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Diameter Thread Pitch Length Origin Item # Availability Price Quantity UOM
1/4 20 12 FT Unrestricted Origin RGB70250000-I In Stock $0.9934/FT FT
5/16 18 12 FT Unrestricted Origin RGB70310000-I In Stock $1.75021/FT FT
3/8 16 12 FT Unrestricted Origin RGB70370000-I In Stock $1.66935/FT FT
7/16 14 12 FT Unrestricted Origin RGB70430000-I In Stock $4.34656/FT FT
1/2 13 12 FT Domestic RGB70500000-U In Stock $3.08435/FT FT
9/16 12 12 FT Unrestricted Origin RGB70560000-I In Stock $3.71839/FT FT
5/8 11 12 FT Domestic RGB70620000-U In Stock $2.89193/FT FT
3/4 10 12 FT Domestic RGB70750000-U In Stock $3.99827/FT FT
7/8 9 12 FT Domestic RGB70870000-U 5-7 Working Days $4.72679/FT FT
1 8 12 FT Domestic RGB71000000-U In Stock $6.94537/FT FT
1 1/8 7 12 FT Domestic RGB71120000C-U In Stock $12.41767/FT FT
1 1/8 8 12 FT Domestic RGB71120000-U In Stock $6.97128/FT FT
1 1/4 7 12 FT Domestic RGB71250000C-U 5-7 Working Days $9.12259/FT FT
1 1/4 8 12 FT Domestic RGB71250000-U In Stock $10.73698/FT FT
1 3/8 6 12 FT Domestic RGB71370000C-U In Stock $9.7581/FT FT
1 3/8 8 12 FT Domestic RGB71370000-U In Stock $10.93104/FT FT
1 1/2 6 12 FT Domestic RGB71500000C-U 5-7 Working Days $13.99344/FT FT
1 1/2 8 12 FT Domestic RGB71500000-U In Stock $14.73465/FT FT
1 5/8 5.5 12 FT Domestic RGB71620000C-U In Stock $29.28967/FT FT
1 5/8 8 12 FT Domestic RGB71620000-U In Stock $15.72005/FT FT
1 3/4 5 12 FT Domestic RGB71750000C-U 5-7 Working Days $15.23165/FT FT
1 3/4 8 12 FT Domestic RGB71750000-U In Stock $19.22776/FT FT
1 7/8 5 12 FT Domestic RGB71870000C-U In Stock $12.25912/FT FT
1 7/8 8 12 FT Domestic RGB71870000-U In Stock $20.89174/FT FT
2 8 12 FT Domestic RGB72000000-U In Stock $27.92743/FT FT
2 1/4 8 12 FT Domestic RGB72250000-U In Stock $35.51443/FT FT
2 1/2 8 12 FT Domestic RGB72500000-U In Stock $40.18165/FT FT
2 3/4 8 12 FT Domestic RGB72750000-U In Stock $54.06048/FT FT
3 8 12 FT Domestic RGB73000000-U 5-7 Working Days $65.00615/FT FT