B7 Studs

Attractive Mediaz on December 11, 2021

B7 Studs

Alloy Steel, AISI 4140/4142 Quenched and Tempered

These Grade B7 threaded rods meet the pressure and temperature requirements of ASTM A193 and are often used to secure pressure tanks, valves, and flanges.
Zinc yellow-chromate plated steel threaded rods resist corrosion in wet environments.

Blue PTFE-coated steel threaded rods are chemical resistant and have a slippery surface to thread on smoothly. Black-oxide steel threaded rods have a dark surface color and are corrosion resistant in dry environments.

Grade Appropriate A194 2H Heavy Hex Nut

Grade	Size	Tensile Ksi,min	Yield,ksi,min	Elong,%,min	RA%min	HBW	HRC
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

B16 Studs

Attractive Mediaz on December 11, 2021

B16 Studs

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ASTM A193 Grade B16
Stud Bolts

ASTM A193 Grade B16 stud bolts are high strength fasteners manufactured from heat treated Chromium-Molybdenum-Vanadium steel, quenched and tempered. Added Vanadium allows for operating temperatures higher than that of B7 stud bolts.
Dimensional specifications are governed by ASME B18.31.2. Grade markings consists of both the grade symbol “B16″ and the manufacturer’s identification mark on one end of each stud 3/8″ diameter and larger. Manufacturer’s marking may be placed on other end if insufficient space. Inch series fasteners meeting ASTM A193 Grade B16 specifications are typically used in the power and petrochemical industries on boilers, turbines, and other pressurized equipment with elevated temperatures. ASTM A193 covers the requirements for high temperature and high pressure bolting. A193 B16 all thread studs having diameters above 1” are most common in 8UN thread pitches.

Grade Appropriate Nut – A194 GR7 Heavy Hex Nut

B8 STUDS

Attractive Mediaz on December 11, 2021

B8 STUDS

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Class 1 Stainless Steel, AISI 304, Carbide Solution Treated.
Class 2 Stainless Steel, AISI 304, Carbide Solution Treated, Strain Hardened

ASTM A193 Grade B8 studs are manufactured from AISI 304 stainless steel, and tested to meet A193. Dimensional specifications are governed by ASME B18.31.2. Grade markings consists of both the grade symbol “B8″ and the manufacturer’s identification mark on one end of each stud 3/8″ diameter and larger. Manufacturer’s marking may be placed on other end if insufficient space. A193 grade B8 all thread studs having diameters above 1” are most common 8UN (8 threads per inch). For use in pressure vessels, valves, flanges, and fittings for high temperature or high pressure service, or other special purpose applications. A320 grade B8 studs available for low temperature service.

A193 Mechanical Properties (Grade Appropriate Nut – A194 Heavy Hex Nut)

Grade	Size	Tensile Ksi,min	Yield,ksi,min	Elong,%,min	RA%min	HBW	HRC
B8 Class 1	ALL	75	30	30	50	223 max	35 max
B8 Class 2	Up to 3/4	125	100	12	35	321 max	35 max
	7/8-1	115	80	15	35
	1-1/8- 1-1/4	105	65	20	35
	1-3/8- 1-1/2	100	50	28	45

B8M STUDS

Attractive Mediaz on December 11, 2021

B8M STUDS

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Class 1 Stainless Steel, AISI 316, Carbide Solution Treated

A193 Mechanical Properties (Grade Appropriate Nut- A194 Grade 8M Heavy Hex Nut

Grade	Size	Tensile Ksi,Min	Yield,Ksi,Min	Elong,%,min	RA%min	HBW	HRC
BBM Class 1	ALL	75	30	30	50	223 max	96 max
B8M Class 2	Up to 3/4	110	95	15	45	321 max	35 max
	7/8-1	100	80	20	45
	1-1/8- 1-1/4	95	65	25	45
	1-3/8- 1-1/2	90	50	30	45