4140 steel specicification:
1. 4140 equivalent steel material: 42CrMo, 42CrMo4, 4140, scm440, 42cd, as 4140
2. 4140 steel chemical composition: C: 0.38-0.48, Si: 0.15-0.35, Mn: 0.75-1.00, S/P: 0.035 max, Cr: 0.90-1.20, Mo: 0.15-0.25
3. 4140 steel grade: astm a193 grade B7, ISO grade 8.8, 10.9, 12.9, astm f1554 grade 105
4. 4140 steel common mechanical properties after QT:
Tensile Strength: 860MPa min
Yield Strength: 720MPa min
Elongation: 16% min
Reduction of Area: 52% min
Hardness: 35HRC max for 4140 q&t steel. Annealed steel bar hardness: 217HB max.
5. 4140 steel bar shapes:
4140 round steel bar, 4140 Square Steel Bar, 4140 Flat Steel Bar, 4140 hexagonal steel bar
6. 4140 technical parameters:
A.4140 steel bar diameters: 10mm to 100mm
B. 4140 steel bar diameter tolerance: 0.025 mm min
C. 4140 steel bar length: 100mm min per piece
D. 4140 steel bar length tolerance: +/-1mm
E. 4140 steel bar surface roughness: 0.4um min
F. 4140 steel bar straightness: 0.5mm/m min
G. 4140 steel bar ovality: 75% of diameter tolerance
7. 4140 steel bar applications:
high strength stud bolt, Threaded Rods, wind power bolt, prestressed anchor bolts, post stressed anchor bolt, Steel Tie Rod, tie bar, tension rod, Tension Bar etc. Shaft, axle shaft, crankshaft, shaft for sleeve, linear shaft, pump shaft, rotor shaft, sensor shaft, spline shaft, drive shaft, mandrel shaft, transmission shaft, screw rod etc. CNC machines, precision CNC machines etc. Ejector pins and Ejector rods
