ASTM A193 Grade B7

ASTM A193 B7 Stud Bolts | PED Certified Industrial Fasteners

High-strength chromium-molybdenum stud bolts for pressure-boundary joints, process piping, industrial valves and oil & gas equipment.

A193 B7High-pressure boltingA194 2H pairingPED documentation

Quick answer

ASTM A193 B7 is a quenched-and-tempered alloy-steel bolting grade widely used for high-temperature and high-pressure service. LOKRON supplies B7 stud bolts with matched ASTM A194 2H nuts, PED documentation and EN 10204 3.1 traceability.

Specification and supply scope

Standard	ASTM A193 / ASME SA193 Grade B7; common inch and metric sizes available.
Material	Cr-Mo alloy steel, quenched and tempered; properties verified by lot-specific inspection.
Pairing	ASTM A194 Grade 2H or project-specified heavy hex nuts.
Finishes	Plain, PTFE/Xylan, zinc flake and other project-approved coatings.
Documents	EN 10204 Type 3.1 MTR, dimensional inspection and PED declaration where applicable.

Typical applications

✓Refinery and petrochemical flange connections
✓Pressure vessels, heat exchangers and process piping
✓Gate, globe, ball and check valve assemblies
✓Power-generation high-temperature bolting

Documentation available

✓Heat/lot traceability
✓Chemical and mechanical test results
✓Hardness and dimensional inspection
✓Third-party inspection or Type 3.2 package on request

Related engineering resources

B7 torque chart

Review torque, preload and lubrication factors.

Bolt and nut pairing

Match A193 studs with A194 heavy hex nuts.

PED grade index

See the full PED-certified product scope.

Need a grade, drawing or complete bolting set?

Send the standard, size, quantity, coating and service condition. LOKRON's technical sales team can confirm scope and documentation within 24 hours.

Request a technical quote

Frequently asked questions

What nut is normally paired with an A193 B7 stud bolt?

ASTM A194 Grade 2H heavy hex nuts are the common pairing, subject to the project specification and service condition.

Is ASTM A193 B7 suitable for low-temperature service?

B7 is primarily selected for high-temperature/high-pressure service. For low-temperature service, review ASTM A320 L7 and the required impact-test conditions.

Can LOKRON provide B7 stud bolts with PED documents?

Yes, for products within the applicable PED quality scope, LOKRON can provide the required material traceability and conformity documentation.