Easy cut steel SUM12 polishing rod Centerless polished round easy cut steel grinding rod

SUM12

Uses: stud bolts, screws, nuts, pipe joints, spring seat, etc.

SUM12 free cutting steel complies with JIS G 4804-1999

SUM12 Free cutting tempering Components:

Carbon C: 0.08 ~ 0.13

Manganese Mn: 0.60 ~ 0.90

P: 0.040

Sulfur S: 0.08 ~ 0.13

Mechanical property

Tensile strength σb (MPa) : (hot rolled)450 ~ 600; (cold drawn) steel thickness or diameter 8 ~ 20 :570 ~ 785; >20 ~ 30 hours :530 ~ 745; >30 :510 ~ 705

Section shrinkage (%) : (hot rolling)≥30

hardness

(hot rolling)≤175HB; (cold drawn)167 ~ 217HB

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