ASTM A193 B8T Stud Bolts

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ASTM A193 B8T Stud Bolts Manufacturer and Supplier in Delhi, India

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Punit Fasteners, a top-notch manufacturer and supplier located in Delhi, India, specializes in precision-engineered ASTM A193 B8T Stud Bolts. These bolts are crafted for high-temperature, corrosive, and welding-heavy environments. Made from Type 321 stainless steel, they feature titanium stabilization to resist intergranular corrosion, particularly after welding and thermal exposure. Our B8T stud bolts adhere strictly to ASTM A193 specifications, guaranteeing impressive mechanical strength, precise dimensions, and dependable performance. Commonly found in sectors like petrochemical, oil & gas, marine, and thermal power, Punit Fasteners provides robust, tested, and certified fastening solutions for both domestic and international markets.

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ASTM A193 B8T Stud Bolts are crafted from Type 321 stainless steel, which includes 17–20% chromium, 9–13% nickel, and titanium added in controlled amounts (at least five times the carbon content). The titanium stabilizes the alloy, preventing carbide precipitation and boosting resistance to intergranular corrosion. These stud bolts boast a minimum tensile strength of 515 MPa and a yield strength of 205 MPa, along with excellent elongation, toughness, and high-temperature oxidation resistance. Designed for bolted joints in heat-affected or corrosive settings, B8T stud bolts excel where standard stainless fasteners might struggle due to sensitization.

ASTM A193 B8T Stud Bolts 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 Stud Bolts 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 Stud Bolts Specifications

Material	Specification	Standards	Size	Length
ASTM A193 B8T Stud Bolts	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 stud bolts are made from stainless steel with excellent resistance to high temperatures and corrosion. They are primarily used in high-stress applications such as oil and gas, petrochemical plants, and power generation facilities. Their resistance to oxidation and creep makes them ideal for use in environments where temperatures can exceed 1000°F (537°C). Common applications include securing flanges, piping systems, and equipment where durability and reliability under extreme conditions are critical.

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Types of ASTM A193 B8T Fasteners

ASTM A193 B8T Stud Bolts are extensively utilized in high-temperature and chemically aggressive settings, especially where welding is a factor. Common applications include flanged pipe connections, pressure vessels, heat exchangers, reactors, and boilers across industries like oil & gas, chemical processing, marine, pharmaceuticals, and power generation. Their titanium-stabilized makeup ensures long-lasting resistance to intergranular corrosion, even after multiple heating or welding cycles. Punit Fasteners is committed to delivering reliable solutions that stand the test of time.