Easy cut steel 9SMnPb28 steel wire cold drawn wire annealing rod

Product name: Free cutting steel

Grade: 9SMnPb28 free cutting steel

Free cutting steel for use

Commonly used in the manufacture of more important mechanical parts, parts such as gears, shafts, bolts, nuts, screws, valves, bushings, pins, pipe joints, standard parts and machine tool screw.

Chemical composition

Carbon C: 0.10

Silicon Si: ≤0.15 or protocol

Manganese Mn: 0.80 ~ 1.20

Sulfur S: 0.23 ~ 0.33

P: 0.05 ~ 0.10

Lead Pb: 0.15 ~ 0.35

Mechanical property

Tensile strength σb (MPa) :

(hot rolled)390 ~ 540;

(cold drawn) steel φ8 ~ 20 :530 ~ 755; >20 ~ 30 hours :510 ~ 735; >30 hours :490 ~ 685

Elongation δ5 (%) : (hot rolling)≥22; (Cold rolled)≥7.0

Section shrinkage (%) : (hot rolling)≥36

Hardness: (hot rolling)≤170HB; (cold drawn steel) 152-217HB

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