The Hobart Institue of Welding offers the Pocket Welding Guide in its 30th edition. It features new filler metals, new photos of good and bad welds, preheat temperature for metals, and AISI designation system for carbon and low alloy steels. It includes troubleshooting guides, essentials for good welding, welding symbols, joints, and positions, causes and cures for common welding problems, and more. For more information call (800) 332-9448, ext. 5433, or visit www.welding.org.
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