✓ Available from European Stock
• ASTM A193 B7 / ASTM A320 L7
• EN 10269
• EN 10204 3.1
• Thread Rolling Bars (TRB)
• Worldwide Delivery
• Cut-to-Length Service
• Fast Quotations within 24 Hours
Looking for ASTM A193 Grade B7, ASTM A320 Grade L7 or Thread Rolling Bars (TRB) for stud bolt manufacturing?
WTE PowerSteel is a European supplier and stockholder of ASTM A193 B7 / ASTM A320 L7 alloy steel round bars for critical bolting applications. We supply certified round bars with full material traceability, EN 10204 3.1 certification and fast worldwide delivery.
ASTM A193 Grade B7 is one of the world’s most widely specified alloy steel grades for high-pressure and high-temperature bolting. It is commonly used for manufacturing stud bolts, threaded rods, anchor bolts and other critical fastening components for pressure vessels, valves, flanges and piping systems operating under demanding service conditions.
ASTM A320 Grade L7 is manufactured from a similar chromium-molybdenum alloy steel but is additionally impact tested for low-temperature service. This makes it the preferred material for bolting used in cryogenic systems, LNG facilities, offshore installations and other applications where excellent toughness at sub-zero temperatures is required.
Compared with conventional alloy steels, ASTM A193 B7 and ASTM A320 L7 provide excellent mechanical strength, fatigue resistance and long service life for critical bolting applications. While B7 is primarily selected for elevated-temperature service, L7 offers the additional low-temperature toughness required for demanding cryogenic and sub-zero environments.
ASTM A193 B7 / ASTM A320 L7 materials are commonly used for manufacturing:
Our customers use ASTM A193 B7 / ASTM A320 L7 in:
We supply:
Available diameters and lengths upon request.
Material can be supplied with:
This material is also known as:
ASTM A193 Grade B7 is a chromium-molybdenum alloy steel specification widely used for manufacturing high-strength bolts, stud bolts and threaded rods for high-pressure and elevated-temperature applications in power generation, petrochemical plants and industrial piping systems.
Both specifications use similar chromium-molybdenum alloy steel and provide comparable mechanical strength. The key difference is that ASTM A320 L7 requires mandatory Charpy impact testing, making it suitable for low-temperature and cryogenic service, while ASTM A193 B7 is intended for standard and elevated-temperature applications.
Yes. WTE PowerSteel supplies Thread Rolling Bars (TRB) with optimized tolerances for manufacturing stud bolts, threaded rods and other critical fasteners.
Yes. WTE PowerSteel supplies ASTM A193 B7 / ASTM A320 L7 round bars from European stock. Please contact our sales team for current stock availability, dimensions and delivery times.
Yes. We supply both full-length bars and precision cut-to-length pieces according to customer requirements.
WTE PowerSteel is a European supplier and stockholder of alloy steels, heat-resistant steels and nickel alloys for Oil & Gas, petrochemical, power generation and heavy industry. We supply ASTM A193 B7 / ASTM A320 L7 round bars with full material traceability, EN 10204 3.1 certification, fast quotations, Thread Rolling Bars (TRB), cut-to-length service and worldwide delivery.
Material for fasteners manufacturing.
Thread rolling diametter TRB metric 6g, metric DIN 2510, inch UNC and 8UN for threaded bars and stud bolts.
EN 10269 + AD 2000 Merkblatt W7 + PED 2014/68EU EN 10204-3.1 or EN 10204-3.2 TÜV Germany
Material conform also with EN 898-1 class 8.8 and 42CrMo4+QT / 1.7225 acc to EN 10269
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