Ibyuma birashobora kugabanywamo ibyuma bike bya karubone, ibyuma bya karubone yo hagati hamwe nicyuma kinini cya karubone. Ibyuma bya karubone bike - ibirimo karubone muri rusange biri munsi ya 0,25%; icyuma giciriritse giciriritse - ibirimo karubone muri rusange biri hagati ya 0,25 na 0,60%; ibyuma byinshi bya karubone - ibirimo karubone muri rusange birenze 0,60%.
Igipimo ngenderwaho: igihugu cyanjye Tayiwani CNS isanzwe yicyuma S20C, Ubudage bwa DIN ibikoresho bisanzwe 1.0402, Ubudage DIN busanzwe ibyuma CK22 / C22. Icyongereza BS icyuma gisanzwe IC22, Igifaransa AFNOR icyuma gisanzwe cya CC20, Igifaransa NF gisanzwe cyuma C22, Ubutaliyani UNI icyuma gisanzwe C20 / C21, Ububiligi NBN ibyuma bisanzwe C25-1, Suwede SS ibyuma bisanzwe 1450, Espagne UNE ibyuma bisanzwe Oya F.112, Abanyamerika AISI / SAE ibyuma bisanzwe No 1020, Ubuyapani JIS ibyuma bisanzwe S20C / S22C.
Ibigize imiti: Carbone C: 0.32 ～ 0.40 Silicon Si: 0.17 ～ 0.37 Manganese Mn: 0.50 ～ 0.80 Sufuru S: ≤0.035 Fosifore P: ≤0.035 Chromium Cr: ≤0.25 Nickel Ni: ≤0.25 Umuringa Cu: ≤0.25 Icya kane, ibikoresho bya mashini . Ingaruka zingaruka 55 agaciro αkv (J / cm²): ≥69 (7) Ubukomere: budashyushye ≤197HB Ingano yicyitegererezo: ingano yicyitegererezo ni 25mm Imikorere ya tekiniki Igipimo cyigihugu: GB699-1999
