ASTM A193 B8T Nuts

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ASTM A193 B8T Nuts Manufacturer and Supplier in Houston , USA

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With pride, Brian Fasteners supplies high-quality ASTM A193 B8T Nuts, forged from Type 321 stainless steel for maximum stability in high-temperature and corrosive environments. Solid-solution treated and carbide-stabilized, these nuts are best suited for intergranular corrosion resistance and high service temperatures. Used most often with B8T bolts or stud bolts, our B8T nuts are the choice in chemical, pharmaceutical, and aerospace industries. Manufactured to ASTM A193 and A194 specifications, Brian Fasteners’ B8T nuts are extensively tested for tensile strength, hardness, and corrosion resistance. Brian Fasteners provides dependable fastening parts made for accuracy and longevity.

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ASTM A193 B8T Nuts are made from Type 321 stainless steel, with 17–19% chromium, 9–12% nickel, and titanium (at least 5x carbon content) for stabilizing carbides. This type of alloy gives excellent resistance to intergranular corrosion and retains strength in high-temperature conditions. The typical mechanical properties are tensile strength of 75 ksi (min), yield strength of 30–35 ksi, and Rockwell hardness of B80–B95. These nuts do not exhibit magnetic properties, have good weldability, and maintain toughness to cryogenic temperatures. Their structure is stabilized, providing longevity under repeated thermal cycling and corrosive exposure.

ASTM A193 B8T Nuts Chemical Composition

Element	B7	B8	B8M
Carbon	0.37 – 0.49%	0.08% max	0.08% max
Manganese	0.65 – 1.10%	2.00% max	2.00% max
Phosphorus, max	0.035%	0.045%	0.045%
Sulfur, max	0.040%	0.030%	0.030%
Silicon	0.15 – 0.35%	1.00% max	1.00% max
Chromium	0.75 – 1.20%	18.0 – 20.0%	16.0 – 18.0%
Nickel		8.0 – 11.0%	10.0 – 14.0%
Molybdenum	0.15 – 0.25%		2.00 – 3.00%

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ASTM A193 B8T Nuts Mechanical Properties

Grade	Size	Tensile ksi, min	Yield, ksi, min	Elong, %, min	RA % min
B7	Up to 2-1/2	125	105	16	50
	2-5/8 – 4	115	95	16	50
	4-1/8 – 7	100	75	18	50
B8 Class 1	All	75	30	30	50
B8M Class 1	All	75	30	30	50
B8 Class 2	Up to 3/4	125	100	12	35
	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 Class 2	Up to 3/4	110	95	15	45
	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

ASTM A193 B8T Nuts Specifications

Material	Specification	Standards	Size	Length
ASTM A193 B8T Nuts	IS BS ASTM	DIN, ISO, JIS, GB, IS, BS, ASTM	M 02 to M 160	3 mm to 200 mm

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ASTM A193 B8T Nuts find extensive use in chemical processing equipment, refineries, food-grade piping systems, and vessels in the pharmaceutical industry because of their high corrosion resistance. They are applicable in flanged joints of high temperature, reactor equipment, and heat exchangers, especially where intergranular corrosion sensitization is a factor of concern. B8T nuts in aerospace and power generation are mechanistically stable under vibrations, pressure, and heat. They are best in applications involving repeated changes in temperature. They are also utilized in welded assemblies and marine systems, where scaling resistance and precipitation of carbide are a factor of concern.

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Types of ASTM A193 B8T Nuts

We provide complete documentation on our ASTM A193 B8T nuts, including 100% radiography test reports, raw material test reports, customer test reports, and heat treatment plans. This includes our packaging, fumigation certificates, marketing invoices, quality assurance systems, and raw materials. In addition, we issue manufacturer test certificates (MTC) under EN 10204/3.1B. Our ASTM A193 B8T nuts are packaged according to industry standards and manufactured to meet customer specifications, ensuring quality and complying with all required documentation.