50Mnis a kind of high-quality carbon structural steel bar which under
GB/T 699-1999 standard. Strength, elasticity and hardness are
higher, Used after quenching and tempering, poor welding
Quenching, Annealing, Normalizing and Tempering.
Chemical composition %:
Tensile strength σb
Yield strength σb
reduction of area
No heat treatment
Impacting Energy Akv (J)
Notched bar impact strength
No heat treatment ≤255HB; annealing ≤217HB
50Mn is used in the manufacture of high requirement of abrasion
resistance, high load under the action of heat treatment of parts,
such as gear, gear shaft and cross section under 80 mm spindle,
etc. The property of 50Mn is similar with 50# steel. But 50Mn’s
hardenability is higher, 50Mn’s strength, hardness, elasticity is
higher than 50# steel. 50Mn has poor weldability, sensitivity and
temper brittleness tendency for overheating. 50Mn is used as a
stress parts, high wear-resistant parts, high stress components,
such as spindle less than 80 mm in diameter. After high frequency
quenching ,50Mn can also manufacture train axle, worm, and
automotive crankshaft, connecting rod, such as gears. Gear, shaft.
The friction plate. Spindle. Flat spring, etc.