4140 is a 1% chromium-molybdenum medium hardenability general-purpose high-strength steel, usually hardened and tempered in the tensile range of 850-1000 Mpa (condition T). 4140 now have improved machinability, which greatly increases feed and/or speed, while extending tool life without affecting mechanical properties. The prehardening and tempering 4140 can be further case hardened by flame or induction hardening and nitriding.
Product Parameters
Product Name | AISI/SAE 4140 Carbon Steel Bar | |||
Standard | EN/DIN/JIS/ASTM/BS/ASME/AISI etc. | |||
Common round barSpecifications | 3.0-50.8 mm,Over 50.8-300mm | |||
Flat steelCommonSpecifications | 6.35x12.7mm,6.35x25.4mm,12.7x25.4mm | |||
Hexagon BarCommonSpecifications | AF5.8mm-17mm | |||
Square BarCommonSpecifications | AF2mm-14mm,AF6.35mm,9.5mm,12.7mm,15.98mm,19.0mm,25.4mm | |||
Length | 1-6Meters,Size accept custom | |||
Diameter(Mm) | hot rollinground bar | 25-600 | cold rollingSquare Bar | 6-50.8 |
hot rollingSquare Bar | 21-54 | cold rollingHexagon Bar | 9.5-65 | |
cold rollinground bar | 6-101.6 | Forged Rebar | 200-1000 | |
SurfaceProcess | Bright, polished, black | |||
Other Services | Machining(CNC), centerless grinding (CG), heat treatment, annealing, pickling, polishing, rolling, forging, cutting, bending, small machining, etc. | |||
chemical composition
Grade | Mn | S | C | P | Si | Cr | Ni |
AISI 4140 | 0.75-1.00 | 0.035 | 0.38-0.43 | 0.035 | 0.20-0.35 | 0.8-1.1 | 0.15-0.25 |
Mechanical properties
Grade | Tensile Strengthpsi | Yield strengthpsi | Elongation% | HardnessHRC |
AISI 4140 | 100k | 80k | 20 | 18-22 |
Scope of application
SAE 4140 are widely used in most industrial sectors, with a wide range of applications, such as: adapters, spindles, axles, bolts, crankshafts, connecting rods, chuck bodies, chucks, conveyor belt pins and rollers, ejection pins, forks, gears, Guide rods, hydraulic shafts and parts, lathe spindles, logging parts, milling spindles, motor shafts, nuts, clamping rods, various pins, pins, pump shafts, plungers, sleeve, spindle, sprocket, stud bolt, tool holder, torsion bar, worm, etc.
