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QUESTION 3 Some stainless steel articles carry a symbol "15-5". This symbol means that the stainless steel contains a. 15% Ni + 5% Cr b. 15% Cr+ 5% C c 15% Fe + 5% Cr d. 15% Cr + 5% Ni QUESTION 4 Is it industrially viable to harden ALSI 1018 steel by quenching from high temperatures? a. No, because the amount of carbon in this steel is too small. b. No, because steels cannot be hardened by quenching. Oc. No, because there are no other alloying elements in this steel. d. Yes, because all kinds of steels can be hardened in industry by quenching. ****
Transcribed Image Text:QUESTION 3 Some stainless steel articles carry a symbol "15-5". This symbol means that the stainless steel contains a. 15% Ni + 5% Cr b. 15% Cr+ 5% C c 15% Fe + 5% Cr d. 15% Cr + 5% Ni QUESTION 4 Is it industrially viable to harden ALSI 1018 steel by quenching from high temperatures? a. No, because the amount of carbon in this steel is too small. b. No, because steels cannot be hardened by quenching. Oc. No, because there are no other alloying elements in this steel. d. Yes, because all kinds of steels can be hardened in industry by quenching. ****
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