Forged steel round bars AISI4340

Model Number: hot forged steel bar -12 Brand Name: Unite Steel Key Specifications/Special Features: forged steel round bars AISI4340Applications:Components for the aircraft, automotive, general engineering industries, propeller shafts, connecting rods, gear shafts, and other automobile parts, heavy forgings, rotors, shafts, discs. pulley shafts, gears, pins and axles, heavy-duty axles, shafts, heavy duty gears, spindles, pins, studs, collets, bolts, couplings, sprockets, pinions, torsion bars, connecting rods, crow bars, conveyor parts etc. Used where higher yield and tensile strength than 4140 is required.Related specifications:Australia AS 1444-2007 4340Germany W.Nr 1.6565 34CrNiMo6
Great Britain BS970 1955 EN24

BS970 Part 3:1991 817M40

BS EN10083:1-1991 817M40

USA ASTM A29A29M 1991 4340

ASTM A322 4340

SAE 4340

UNS G43400

Japan JIS G 4103 SNCM439

JIS G 4103 SNCM8

Werkstoff 1.6565 40NiCrMo6

Chemical composition(%):

Carbon 0.37-0.44

Silicon 0.17-0.37

Manganese 0.50-0.80

Phosphorus 0.04 max

Sulphur 0.04 max

Chromium 0.60-0.90

Molybdenum 0.15-0.25

Nickel 1.25-1.85

Process:EAF+LF+VD+ forged + heat treatment(optional)

Size range:

Round: Hot Rolled: 10mm-320mm, hot forged: 80-1200mm

Surface finishes: Black, peeled , cold drawn, turned & Polished , precision ground

Test:Ultrasonic test according to SEP 1921-84 C/c, D/d