ASTM A320 GR L7 – Eurasia Fasteners

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Product Description

ASTM A193 Grade L7, It is an alloy steel stud specially developed for use at low temperatures. This grade has high tensile strength and toughness, maintaining its mechanical strength even at temperatures as low as -100 °C. It is commonly preferred in cryogenic applications, LNG plants, and natural gas infrastructure.

Technical Specifications

Feature
Standard	ASME
Material	Alloy Steel
Type	Stud Bolt
Quality	ASTM A320 Grade L7
Coating	Electrogalvanized (White/Yellow), Hot-Dip Galvanized (HDG), Nickel, Black Oxide, Dacromet, Geomet
Tooth Type	Metric Coarse Thread, Metric Fine Thread – UNC / UNF (Inch)
Measurement Range	From M10 to M100, 1/2″-3″
Production Method	Grinding or machining
Thread Direction	Right-Hand Thread (standard) / Left-Hand Thread (upon request)

Areas of Use

Cryogenic systems and low-temperature applications
LNG and natural gas processing plants
Pressure vessel connections
Petrochemical and refinery systems
Power plants
Gas and liquid transmission lines (in cold climate conditions)

Certificates and Quality Documents

ISO 9001:2015 Quality Management System
ISO 14001:2015 Environmental Management System
ISO 45001:2018 Occupational Health and Safety Management System
EU Declaration of Conformity (PED) certificate (Compliance with the Pressure Equipment Directive)
Our production processes, DIN, EN, ISO, and ASTM is fully compliant with the standards
Upon request EN 10204 3.1 certificate is provided

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Frequently Asked Questions About the Product

Is L7 fastening only used in the private sector?

No. Although it is common in sectors such as petrochemicals, natural gas, and LNG, it is also preferred in power plants, shipbuilding, and cold storage facilities.

What is the difference between L7 and L7M?

Both are low-temperature grades, but L7M has lower hardness. L7 offers higher tensile strength, while L7M is safer against the risk of hydrogen embrittlement.

Which fasteners are used with L7 studs?

They are typically used with ASTM A194 Grade 7 heavy hex nuts and ASTM F436 washers.

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