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.

Technical Data

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
Diameter	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
Grade	% 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. 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
1/4	20	12 FT	Unrestricted Origin	RGB70250000-I	In Stock	$0.9934/FT	FT	FT
5/16	18	12 FT	Unrestricted Origin	RGB70310000-I	5-7 Working Days	$1.53872/FT	FT	FT
3/8	24	12 FT	Unrestricted Origin	RGB70370000-I	In Stock	$1.66929/FT	FT	FT
7/16	20	12 FT	Unrestricted Origin	RGB70430000-I	In Stock	$4.34656/FT	FT	FT
1/2	13	12 FT	Domestic	RGB70500000-U	5-7 Working Days	$2.68296/FT	FT	FT
9/16	12	12 FT	Unrestricted Origin	RGB70560000-I	5-7 Working Days	$2.25092/FT	FT	FT
5/8	11	12 FT	Domestic	RGB70620000-U	In Stock	$2.442/FT	FT	FT
3/4	10	12 FT	Domestic	RGB70750000-U	In Stock	$4.00809/FT	FT	FT
7/8	9	12 FT	Domestic	RGB70870000-U	In Stock	$5.0245/FT	FT	FT
1	8	12 FT	Domestic	RGB71000000-U	In Stock	$6.32787/FT	FT	FT
1 1/8	7	12 FT	Domestic	RGB71120000C-U	5-7 Working Days	$10.76261/FT	FT	FT
1 1/8	8	12 FT	Domestic	RGB71120000-U	In Stock	$6.88419/FT	FT	FT
1 1/4	7	12 FT	Domestic	RGB71250000C-U	In Stock	$8.90486/FT	FT	FT
1 1/4	8	12 FT	Unrestricted Origin	RGB71250000-U	In Stock	$10.06316/FT	FT	FT
1 3/8	6	12 FT	Domestic	RGB71370000C-U	In Stock	$9.7581/FT	FT	FT
1 3/8	8	12 FT	Domestic	RGB71370000-U	In Stock	$10.85353/FT	FT	FT
1 1/2	6	12 FT	Domestic	RGB71500000C-U	In Stock	$14.63128/FT	FT	FT
1 1/2	8	12 FT	Domestic	RGB71500000-U	In Stock	$13.31365/FT	FT	FT
1 5/8	5.5	12 FT	Domestic	RGB71620000C-U	In Stock	$29.28967/FT	FT	FT
1 5/8	8	12 FT	Domestic	RGB71620000-U	In Stock	$15.86193/FT	FT	FT
1 3/4	5	12 FT	Domestic	RGB71750000C-U	5-7 Working Days	$15.23165/FT	FT	FT
1 3/4	8	12 FT	Domestic	RGB71750000-U	In Stock	$17.71218/FT	FT	FT
1 7/8	5	12 FT	Domestic	RGB71870000C-U	In Stock	$12.25912/FT	FT	FT
1 7/8	8	12 FT	Domestic	RGB71870000-U	In Stock	$20.75607/FT	FT	FT
2	8	12 FT	Domestic	RGB72000000-U	In Stock	$27.40644/FT	FT	FT
2 1/4	8	12 FT	Domestic	RGB72250000-U	In Stock	$35.51443/FT	FT	FT
2 1/2	8	12 FT	Domestic	RGB72500000-U	In Stock	$40.0974/FT	FT	FT
2 3/4	8	12 FT	Domestic	RGB72750000-U	In Stock	$54.06048/FT	FT	FT
3	8	12 FT	Domestic	RGB73000000-U	5-7 Working Days	$65.00615/FT	FT	FT

B7 All Thread Rod

Technical Data

Tab 1

Governing StandardsGrade B7

Tab 2

Mechanical PropertiesGrade B7

Tab 3

Chemical PropertiesGrade B7

Product Specification

Grade

Diameter

Thread Pitch

Use

Thread Type

Country of Origin