B7 All Thread Rod, Plated
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B7 All Thread Rod, Plated

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. 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. These fasteners are available in yellow zinc plated finish. Zinc plating sacrifices itself, corroding before the base material, offering added corrosion resistance.

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, Plated
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Diameter Thread Pitch Length Item # Availability Price Quantity UOM
1/4 20 3 FT RGB70253600P-I In Stock $3.94721/EA EA
1/4 28 3 FT RGB70253600FP-I In Stock $10.93071/EA EA
5/16 18 3 FT RGB70313600P-I In Stock $2.2072/EA EA
5/16 24 3 FT RGB70313600FP-I In Stock $7.48667/EA EA
3/8 16 3 FT RGB70373600P-I In Stock $3.86337/EA EA
3/8 24 3 FT RGB70373600FP-I In Stock $9.02692/EA EA
7/16 14 3 FT RGB70433600P-I In Stock $3.80244/EA EA
7/16 20 3 FT RGB70433600FP-I In Stock $12.10537/EA EA
1/2 13 3 FT RGB70503600P-I In Stock $7.0763/EA EA
1/2 20 3 FT RGB70503600FP-I In Stock $10.92368/EA EA
5/8 11 3 FT RGB70623600P-I In Stock $12.14295/EA EA
5/8 18 3 FT RGB70623600FP-I In Stock $8.73309/EA EA
3/4 10 3 FT RGB70753600P-I 7-10 Working Days $17.432/EA EA
3/4 16 3 FT RGB70753600FP-I 7-10 Working Days $24.76681/EA EA