Resitant Metal Alloys Fasteners offers high tensile alloy steel AISI 4140 Fasteners including bolts, screws, stud bolts, threaded rods, nuts and washers. AISI 4140 is high strength chromium-molybdenum alloy steel grade used for manufacturing A193 B7, B7M, A320 L7, L7M fasteners for low temperature bolting applications. We majorly produce fully threaded stud bolts, double end studs, hex head bolts, heavy hex bolts, eye bolts and anchor bolts in AISI 4140 alloy steel.

AISI 4140 Alloy Steel

Alloy steel 4140 fasteners are formed using cold forging techniques, however big size fasteners or small quantities of 4140 bolts are produced by hot forging or directly machined from 4140 bar stock. All 4140 fasteners are marked with "BPF" mark followed by corresponding specification or grade symbol.

AISI 4140 Technical Data Sheet

AISI 4140 Fasteners

AISI 4140 Equivalent Grades

AISI 4140 Properties

AISI 4140 Chemical Composition
Carbon	Manganese	Sulphur	Phosphorus	Silicon	Molybdenum	Chromium
0.38 - 0.43 %	0.75 - 1.00 %	0.04 % max	0.035 % max	0.15 - 0.30 %	0.15 - 0.25 %	0.80 - 1.10 %

AISI 4140 Mechanical Properties
Tensile Strength	Yield Strength	Hardness, Rockwell	Hardness, Brinell
655 MPa (Min.)	415 MPa (Min.)	25 - 70	197 (Min.)

AISI 4140 Fastener Specifications