Ka taea te wehea te maitai ki te iti waro maitai, waro maitai reo me te waro maitai teitei.He iti te waro maitai - he iti iho i te 0.25% te ihirangi waro;te waro waro maitai - te nuinga o te wa kei waenganui i te 0.25 me te 0.60%;te maitai waro teitei - he nui ake te ihirangi waro i te 0.60%.
Paerewa Kaiwhakahaere: taku whenua ko Taiwan CNS te tau rino paerewa S20C, Tiamana DIN paerewa paerewa nama 1.0402, Tiamana DIN paerewa maitai tau CK22/C22.Ko te tau rino paerewa BS o Ingarangi IC22, te tau rino paerewa French AFNOR CC20, te tau rino paerewa French NF C22, te tau rino o te Itari UNI C20/C21, te tau rino o Belgium NBN C25-1, te tau rino paerewa a Sweden SS 1450, Spain UNE paerewa maitai. Nama F.112, American AISI / SAE paerewa maitai Nama 1020, Japanese JIS maitai paerewa Nama S20C / S22C.
Te hanganga matū: Waro C: 0.32～0.40 Silicon Si: 0.17～0.37 Manganese Mn: 0.50～0.80 Sulfur S: ≤0.035 Phosphorus P: ≤0.035 Chromium Cr: ≤0.25 Nika Waahanga: ≤0.25 Nickel Ni: 2. : Te kaha tensile σb (MPa): ≥530 (54) Te kaha tuku σs (MPa): ≥315 (32) Te Whakaroa δ5 (%): ≥20 Te whakahekenga rohe ψ (%): ≥45 Te kaha o te paanga Akv (J): ≥ 55 te uara pakari αkv (J/cm²): ≥69 (7) Te pakeke: kare i whakawera ≤197HB Rahi tauira: 25mm te rahi o te tauira Mahinga Hangarau Paerewa motu: GB699-1999
