Which of the following can be the casting temperature for magnesium alloys?

• A. 630¬¨¬®‚Äö√†√ªC
• B. 760¬¨¬®‚Äö√†√ªC
• C. 850¬¨¬®‚Äö√†√ªC
• D. 970¬¨¬®‚Äö√†√ªC