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A193/A320
GYF
Engineered for extreme operating conditions including high temperature, high pressure, and cryogenic low-temperature environments, our B7 Threaded Rod with plain finish is manufactured in full compliance with ASTM A193 and ASTM A320 international standards, covering B7, B7M, L7, and L7M alloy steel grades. These fully threaded rods, also known as threaded studs or all-thread bars, deliver consistent, high-tensile fastening performance for critical industrial applications, making them the preferred choice for EPC contractors, industrial end-users, and large-scale project procurement teams operating in heavy industrial sectors. Our plain finish B7M threaded rod is produced with strict metallurgical control and precision threading, offering a blank canvas for custom post-processing while ensuring full compliance with industry mechanical and dimensional specifications.
Each grade of our alloy steel threaded rod is engineered for targeted operating conditions: B7 grade offers exceptional high-temperature tensile strength for mid-to-high pressure systems; B7M grade provides enhanced stress corrosion resistance with controlled hardness for refinery and petrochemical applications; L7 and L7M grades deliver superior cryogenic toughness for low-temperature environments down to -101℃, ideal for liquefied gas processing and cold storage systems.
Our high strength B7 threaded rod features precision-rolled, uniform threads across the entire length of the bar, with strict tolerance control to ensure consistent, smooth engagement with mating hex nuts and fastening components, eliminating cross-threading and ensuring a secure, load-bearing fit even under dynamic stress.
Manufactured from quenched and tempered alloy steel, every batch of our threaded rods undergoes full mechanical testing, including tensile strength, hardness, and impact testing, to meet or exceed ASTM A193 and A320 standards, delivering reliable performance in critical load-bearing and pressure-containing applications.
The uncoated plain finish of our L7 alloy steel threaded rod provides maximum flexibility for client-specific post-processing, including custom coating, galvanizing, plating, or passivation, as well as on-site cutting, threading modification, and fabrication to suit unique project requirements.
All our threaded rods are manufactured to meet ASTM, ASME, and API industry specifications, with full material traceability and mill test reports (MTRs) provided with every bulk order, ensuring compliance with global industrial safety and quality regulations.
Parameter | Specification Details |
Thread Size Range | 3/8" - 6", M6-M150 |
Available Grades | B7, B7M (ASTM A193); L7, L7M (ASTM A320) |
Base Material | Chrome-Molybdenum Alloy Steel |
Surface Finish | Plain (Uncoated) |
Thread Type | Metric (6g Tolerance), UNC/UNF (2A Tolerance) |
Our B7 and B7M threaded rods are a critical fastening component for upstream wellhead equipment, downstream refinery processing units, and pipeline systems, where high pressure and corrosion resistance are non-negotiable.
Widely used in chemical plants, fertilizer production facilities, and petrochemical reactors, these threaded rods deliver reliable performance for pressure vessels, heat exchangers, and piping systems handling corrosive media.
Ideal for thermal power plants, nuclear power facilities, and renewable energy systems, used for fastening boiler components, turbine housings, and high-pressure steam piping.
The primary fastening solution for fabricating ASME-standard pressure vessels, storage tanks, and heavy industrial equipment requiring high-tensile, code-compliant threaded fasteners.
Our L7 and L7M plain finish threaded rods are designed for offshore platforms, LNG processing facilities, and cryogenic storage systems, where exceptional low-temperature impact toughness is required to prevent brittle fracture.
We specialize in supporting large-scale industrial procurement teams and EPC project contractors with scalable, reliable custom length L7M threaded rod bulk supply solutions. Our in-stock inventory covers all standard grades, thread types, and lengths, with the ability to fulfill full-container bulk orders with short lead times. For specialized project needs, we offer comprehensive custom manufacturing services, including precision cut-to-length machining, custom thread pitches, end chamfering, non-standard diameter sizing, and modified material formulations. All custom products come with full material test reports and dimensional inspection certificates to ensure compliance with project-specific code requirements.
B7 is a standard high-temperature alloy steel grade with a hardness range of HRC 28-38, while B7M is a modified grade with a maximum hardness of HRC 23, designed to reduce the risk of stress corrosion cracking in hydrogen sulfide (H2S) environments common in oil and gas applications.
L7 and L7M grades are manufactured to ASTM A320 standards, engineered for cryogenic low-temperature applications down to -101℃, making them ideal for LNG processing, cryogenic storage, and cold climate industrial projects.
We offer standard metric threads (ISO 898) and unified inch threads (UNC/UNF), with custom thread pitches and tolerance classes available upon request.
Yes, we provide precision cut-to-length machining services for any custom length requirement, with optional end finishing, chamfering, and threading modification to meet your project specifications.
Whether you need bulk standard plain finish B7 threaded rods for ongoing industrial production or custom-engineered alloy steel threaded rods for a critical EPC project, our dedicated technical and sales team is ready to support you. Contact us today to receive your free, no-obligation custom quote, along with complimentary material test report previews, sample testing, and project-specific technical consultation to ensure our products meet your exact heavy industry requirements.
