ASTM A193 B7M Studs, Rods & Bolts

ASTM A193 B7M Studs, Rods & Bolts

B7M studs, rods, and bolts are tempered alloy steel fasteners manufactured to ASTM A193 requirements for sour service and low-temperature environments. ATP supplies B7M fasteners with full MTR traceability.

Properties & Specifications

• Material: Alloy Steel (Cr-Mo)
• Tensile Strength: ~100 ksi minimum
• Lower hardness for ductility
• Charpy impact tested
• Sour service compliant (NACE MR0175)
• Sizes: ¼”–4″ diameters

Applications

• Sour gas pipelines
• Refineries and petrochemical plants
• Pressure vessels exposed to H₂S
• Low-temperature service in cold climates

Compliance

• ASTM A193 Grade B7M
• ASME SA193
• NACE MR0175 / ISO 15156

FAQs

Why choose B7M over B7?
B7M’s lower hardness resists hydrogen embrittlement and stress cracking in sour environments.

What testing is required?
Charpy impact and hardness testing are typical for B7M.

B7M_Fasteners_(ASTM_A193)_SPEC

Please note that this product information is intended for general reference only. Consult the applicable material specification to make sure the correct material is selected for your specific application.