Shuruudaha Qalabka
Qalabka saxanka biriiga wuxuu qaataa heerka birta cawlan ee dalkayga ee 250, oo loo yaqaan HT250, kaas oo u dhigma heerka Mareykanka ee G3000. Shuruudaha saddexda walxood ee ugu muhiimsan ee halabuurka kiimikada waa: C: 3.1∽3.4 Si: 1.9∽2.3 Mn: 0.6∽0.9. Shuruudaha waxqabadka farsamada: xoogga jiidista>=206MPa, xoogga foorarsiga>=1000MPa, leexashada>=5.1mm, shuruudaha adkaanta inta u dhaxaysa: 187∽241HBS.