The raw material of the cast iron welding surface table is the high -strength cast iron HT200-300 ，whose surface hardness is of HB170-240.After the two manual handing such as 600℃ to 700℃ artificial annealing as well as 2 to 3 years of natural aging, the T-slot has plate perfectly resists abrasion and has stable precision.

The packingcae of welding plate usually adopt the iron package or wooden case.since the welding As the foudation worktbale of welding and riveting process, we must guarance the highest flatness accuracy and keep them good maintence.

The direct of using:

1, before using welding platform, we should use non-corrosive gas to clean the anti-rust oil and wipe clean with a degreasing cotton,

2, measuring temperature changes cause accuracy errors .welding platform should be located within a range of 20 ± 5 ℃.

3, welding platform need to be adjusted with the varitation gauge to the right level and ht load on a surface plate is distributed over the working surface.

4, when used carefully and prevent collisions ASAP.

5, If the surface plate is not required for some days, the surface should be coated anhydrous acidic anti-rust oil, moisture-proof paper cover, and putted in a clean dry place.

6, welding platform inspection cycle is up to one year.