1 EXHIBIT 23.1 INDEPENDENT AUDITOR'S CONSENT We consent to the incorporation by reference in Registration Statement No. 33-38702 of Quanex Corporation on Form S-8 of our report dated June 1, 1999, appearing in the Annual Report of Form 11-K of the Quanex Corporation Employee Savings Plan for the year ended December 31, 1998. /s/ DELOITTE & TOUCHE LLP - ------------------------- DELOITTE & TOUCHE LLP Houston, Texas June 28, 1999