7Search.cca350 lf2 class 1a350 lf2 class 1a350 lf2 class 1 vs class 2a350 lf2 class 1 and class 2 differencewhat is a350 lf2 materiala350 lf2 material propertiesa350-lf2a350 lf6 class 2a350 gr.lf2 1a350 lf2 equivalent materiala350 lf2 cl.1astm a350 grade lf2 class 1a350 gr lf2 material