Industrial Fastener · Threaded Rods Series
ASTM A320 L7 Stud Bolt
ASTM A320 Grade L7 is the low-temperature counterpart to A193 B7, with the same chemistry (4140/42CrMo) but heat-treated and Charpy impact-tested for service down to -101 °C (-150 °F). Required for cryogenic and low-temperature flange applications.
Product Overview
ASTM A320 L7 Stud Bolt sourcing essentials
ASTM A320 Grade L7 is the low-temperature counterpart to A193 B7, with the same chemistry (4140/42CrMo) but heat-treated and Charpy impact-tested for service down to -101 °C (-150 °F). Required for cryogenic and low-temperature flange applications.
ASTM A320 / A320M Grade L7
Material per requirement
LNG service, cryogenic flanges, low-temp pipelines
Inspection records, lot labels, certificate options, and destination-ready packing.
Technical Data
Specification range
Final dimensions, mechanical properties, finish, and packing are confirmed against the RFQ and applicable standard.
| Standard | ASTM A320 / A320M Grade L7 |
|---|---|
| Service Temperature | Down to -101 °C (-150 °F) |
| Charpy Impact | 20 ft-lbf min at -101 °C, three-specimen average |
| Mating Nut | ASTM A194 Grade 7 (impact-tested) |
| Application | LNG service, cryogenic flanges, low-temp pipelines |
Common surface finishes
Select an option to review its sourcing note. Exact coating system, thickness, and corrosion requirement are confirmed with the order.
Quality Control
Checked before consolidation and export
Each order is matched to the specified standard and verified at practical control points before shipment.
RFQ confirmation
Standard, size, grade, pitch, finish, certificates, packing, and destination are locked before production.
Lot verification
Critical dimensions, thread fit, markings, finish appearance, and packing labels are sampled and recorded.
Shipment approval
Photos and required reports are organized before consolidated loading and export documentation.
Buyer Questions
Frequently asked questions
Can A193 B7 be used at low temperature?
No. A193 B7 is not Charpy impact-tested at low temperatures and may exhibit brittle fracture. For service below 0 °C, specify A320 L7. Although the chemistry is similar, the required impact testing and proven low-temperature performance distinguish the two.
Ready to quote ASTM A320 L7 Stud Bolt?
Send the standard, size, grade, finish, quantity, packing requirement, and destination. Availability and lead time are confirmed with the inquiry.