please help me Tool steel can be hardened to a higher hardness than alloy steels

Question

please help me

Tool steel can be hardened to a higher hardness than alloy steels a. True b. False What is the typical carbon equivalent for welding on alloy steels a. 30% b. 3% c. .3% d. .03% e. None of the above SAE 52100 would be difficult to quench harden a. True b. False A. Rockwell B of 40 would be easier to machine than a Rc of 37 a. True b. False Which thermal process generates larger grains a. Hardening b. Tempering c. Annealing d. Normalizing e. Tempering What thermal process controls surface scale a. Martempering b. Austempering c. Spheroidizing d. Both a and b e. None of the above

Explanation / Answer

32) 0.3 % carbon Equivalent (CE) for excellent weldability.

Higher concentration of Carbon and other alloys like Cr, Ni, Si, molbdenum etc increase hardness and decrease weldability.

Hence option is (C)

35) Annealing at higher temperature produces larger grains.

Hence option is (C)

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