焊接结构钢材料的建议预热温度包括焊接工艺、材料厚度以及在行或X轴上的最低预热温度。柱或Y轴中有18种结构钢材料，从ASTM A36到API 5L Gr.X42，再到Cl.2到ASTM A517。当你需要快速了解的时候，没有什么比图表更方便的了。办公桌尺寸为11 x 17，墙壁尺寸为22 x 28。层压双音。

Suggested Preheat Temperatures for Welding Structural Steel Materials has welding processes, material thickness, and minimum preheat temperatures in the Row or X axis. In the Column or Y axis are 18 structuralsteel materials, from ASTM A36 to API 5L Gr. X42, to Cl.2 to ASTM A517. When you need to know quickly, nothing beats the convenience of a chart. Desk size 11 x 17 wall size 22 x 28. Laminated twotone.