What is the casting temperature for the alloy with hardness 21?
CREATE TABLE table_name_98 (casting_at__°c_ VARCHAR, hardness VARCHAR)
SELECT casting_at__°c_ FROM table_name_98 WHERE hardness = "21"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_name_98 (casting_at__°c_ VARCHAR, hardness VARCHAR) Question: What is the casting temperature for the alloy with hardness 21? [/INST] SELECT casting_at__°c_ FROM table_name_98 WHERE hardness = "21" </s>