Rack-bar

Chemical composition Element C Si Mn P S Cr V Mo Ni Cu N pb(*) Grade10 0.37 ~0.50 0.15 ~0.35  0.60 ~1.65  Max. .035 .015 ~.045 max 0.25 --- max 0.06 max 0.25 max 0.30 --- --- Grade20 0.38 ~0.48 0.05 ~0.35 0.60 ~1.20 max .05 .015 ~.045 max 0.30 0.08 ~0.13 max 0.08 max 0.30 --- .0105 ~.0125 --- Grade30 0.34 ~0.45 0.05 ~0.35 0.50 ~1.20 max .05 .015 ~.050 0.90 ~1.20 --- max 0.20 --- --- --- 0.15 ~0.35Mechanical Properties  Properties Grade-10 Grade-20 Grade-30  Ultimate Tensile Strength(MPa)  640 min. 720 min. 775 min.  Yield Strength(2% offset-MPa) 425~495 495~620 620~775  % Elongation in 2"(or 50mm) 19% min. 17% min. 13% min.  Impact Properties(at amb.temp.) 27J min. 23J min. 60J min.  Surface Hardeness (HB) 212~248 217~262 248~302Material condition / Processing Grade10 Grade20 Grade30  Cold drawn stress-Relieved Cold drawn stress-Relieved Quenched and Tempered Diameter & Bar Length We can make out Dia. 16mm to 30mm and Bar length by User's needs. General Quality Requirements Surface finish(Ra) shall be 1.5microns maximum(We can supply 6-S) Parts shall be free of seams, scratches, or other surface imperfection that  are greater than 0.076mm deep.  Straightness(TIR) shall be 0.29mm/m maximum. Users . Company Address Dia. TRW St'Co.,Ltd. 780-3,Wonsi-Dong,Danwon-Gu,Ansan-City,GyungGi-Do,KOREA ( Tel : 031-489-9256 ) 23.0mm ~30.2mm