ASTM A193 Grade B8T

ASTM A193 Grade B8T is a standard specification for high tensile alloy steel bolting material for use in high temperature or high-pressure service and other special purpose applications. It covers material specification for bolting used in pressure vessel service, valves, flanges and fittings. ASTM A193 Grade B8T stud bolts are heavily utilized in petroleum and chemical construction applications. This specification defines both SI (Metric) and inch-pound units.

Grade B8T is a heat-treated chromium-molybdenum (Cr-Mo) alloy steel with minimum tensile strength requirement of 125 ksi, yield 105 ksi, and maximum hardness of 35 HRC. Boltport uses Alloy Steel AISI 4140 bar stock or forging stock to produce b8t headed and non-headed bolts. A193 Grade B8T is the most commonly used Bolt specification coupled with A194 Grade 2H Nuts for Bolting Carbon Steel pipeline. A193 B8T bolting is available in metric sizes from M6 to M180 and imperial sizes from 1/4 to 8 inches, in diameter.

Boltport is a manufacturer and supplier of A193 Grade B8T fasteners in form of Stud Bolts (Studs), Hex Bolts, Socket Head Cap Screws, Threaded Rods, Heavy Hex Bolts, Hex Screws, Double End Studs, Eye Bolts, Galvanized Hex Bolts, Anchor Bolts, etc.

Visit Specification page to find information on ASTM A193 Grade B8T chemical composition, applicable heat treatment, and mechanical properties such as tensile strength, yield strength, hardness requirement, product marking, applicable product standards, etc.,

Fastener Dimensional Standards
Product		DIN	ISO	ASME		UNI	BS
Product		DIN	ISO	Imperial	Metric	UNI	Imperial	Metric
Stud Bolts		DIN 976	--	ASME B18.31.2	ASME B18.31.1M	UNI 6610	BS 4882	BS 4882
Double End Studs		DIN 2510	---	ASME B18.31.2	ASME B18.31.1M	---	BS 4882	BS 4882
Tap End Studs		DIN 938	---	ASME B18.31.2	ASME B18.31.1M	UNI 5911	BS 4882	BS 4882
Tap End Studs		DIN 939	---	ASME B18.31.2	ASME B18.31.1M	UNI 5911	BS 4882	BS 4882
Hex Bolts		DIN 931	ISO 4014	ASME B18.2.1	ASME B18.2.3.5M	UNI 5737	BS 3692	---
Heavy Hex Bolts		DIN 6914	ISO 7411	ASME B18.2.1	ASME B18.2.3.6M	UNI 5712	---	---
Hex Cap Screws		DIN 933	ISO 4017	ASME B18.2.1	ASME B18.2.3.1M	UNI 5739	---	---
Socket Head Cap Screws		DIN 912	ISO 4762	ASME B18.3	ASME B18.3.1M	UNI 5931	BS 2470	BS 4168-1
Countersunk Screws		DIN 7991	ISO 10642	ASME B18.3	ASME B18.3.5M	UNI 5933	BS 2470	BS 4168-8
Set Screws	Flat point	DIN 913	ISO 4026	ASME B18.3	ASME B18.3.6M	UNI 5923	BS 2470	BS 4168-2
	Cone point	DIN 914	ISO 4027	ASME B18.3	ASME B18.3.6M	UNI 5927	BS 2470	BS 4168-3
	Dog point	DIN 915	ISO 4028	ASME B18.3	ASME B18.3.6M	UNI 5925	BS 2470	BS 4168-4
	Cup point	DIN 916	ISO 4029	ASME B18.3	ASME B18.3.6M	UNI 5929	BS 2470	BS 4168-5
	Oval point	---	---	---	---	---	BS 2470	---
Eye Bolts		DIN 444	---	ASME B18.15	---	UNI 6058	---	---
Anchor Bolts		DIN 529	---	---	---	---	---	---
U Bolts		DIN 3570	---	ASME B18.31.5	---	---	---	BS 3974

Specification for High Temperature Bolting

ASTM A193 Grade B8T

ASTM A193 Grade B8T Mechanical Properties

ASTM A193 Grade B8T Fasteners

ASTM A193 Grade B8T Fastener Standards

ASTM A193 Grade B8T Fastener Coatings