It should show in the Complaint as to whether he has been charged with a misdemeanor or a felony. From what you describe, it sounds like he would be charged with two misdemeanors. However, there may be other facts and factors at play.
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Whether a Theft is a felony depends on the value of the stolen property (not what the junk yard paid for them) If the value was $1,000 or more, then it is a felony theft. Value in more than one theft all committed within 6 months can be aggregated to reach the $1,000 felony level.
Review the charging document carefully. If in fact he is charged with felonies, take the opportunity to hire an attorney like either Mr. Leroi or Mr. Chappell. Felony convictions have long lasting consequences, especially with regard to employment.