Carbon content directly impacts strength and ductility. Low carbon (≤0.2%) enhances weldability and toughness, ideal for structures requiring flexibility, like bridges in seismic zones. Medium carbon (0.2-0.3%) balances strength and ductility, suited for general construction. High carbon (>0.3%) ogmante fòs rupture men diminye duktilite, fè h - travès frajil ak pi rèd soude - itilize sèlman nan espesyalize, ki ba - aplikasyon pou estrès. Kabòn tou enfliyanse hardenability: pi wo nivo pèmèt pou pi bon tretman chalè, men depase ka lakòz fann pandan refwadisman. Konpayi fabrikasyon ak anpil atansyon kontwole kabòn satisfè estanda, asire h - travès fè jan ki fèt nan ka itilize yo.