Free cutting steel SUM24L round steel cold drawn round rod Bright steel rod

SUM24L free cutting steel Uses:

Mainly used in the production of small forces and strict requirements for size and finish instrumentation, watch parts, automobiles, machine tools and other machines used on the dimensional accuracy and finish requirements are strict, and the mechanical performance requirements are relatively low standard parts, Such as gears, shafts, bolts, valves, bushings, pins, pipe joints, spring cushions and machine tool screws, plastic molding molds, surgical and dental procedures and other products that need to be cut after secondary processing such as information, communication, 3C home appliances machinability is good, processing common cutting materials.

SUM24L free cutting steel standard JIS G 4804-1999

SUM24L Free cutting tempering Components:

Carbon C: <= 0.15

Manganese Mn: 0.85 ~ 1.15

Sulfur S: 0.26 ~ 0.35

P: 0.04 ~ 0.09

Lead Pb: 0.10 ~ 0.35

Mechanical property

Tensile strength σb (MPa) : ≥42

Yield strength σs (MPa) : -

Elongation δ5 (%) : ≥22

Section shrinkage ratio ψ(%) : ≥34

Hardness: ≤160HB

SUM24L Free cutting steel Physical properties:

Heat treatment: HRC carburized skin 0.5MM 60 degrees can not be conditioned

Dimensional tolerance: CD± 0.03CG ±0.01

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