SLS600 wearpipe is a special chemistry, core hardened pipe, engineered for maximum life in highly abrasive applications.
SLS600 Wearpipe is achieved by a unique heating/quenching process that alters the steel’s microstructure through the pipe wall. The result is a pipe with an inner surface hardness of 600 BHN typ. to provide exceptional abrasion resistance while the outer surface, cooling slower, remains more ductile, with a hardness of 250 BHN. This unique process allows the pipe to accommodate service and welding stresses.
SLS600 is a highly economical solution to many of the abrasive wear problems found with carbon steel pipe. SLS600 is also a much more user and maintenance friendly option to replace the heavy, brittle cast piping often used to combat abrasion.
(for reference only)
|SCH 40||SCH 80|
Contact us for custom sizes.
Based on Mild Steel
|Mild Steel||SLS 600 Induction Hardened Pipe|
|Hardness||120-150 BHN||600 BHN|
|Max Temperature||750° F (400° C)||450° F (230° C)|
|Std. Sizes (OD)||Unlimited||2.5″ to 24″|
|Emergency Repair||Easily Patched||Easily Patched|
|Min. Bend Radius||20″ min. or 3x Diameter|
An abrasion resistant 600 BHN inside surface tapers to a 250 BHN ductile outer surface that can withstand shock and service stresses.
We recommend the use of St. Lawrence's fabrication services to eliminate processing and fabrication errors.
Cutting SLS600® products can be accomplished with plasma cutting equipment, or an abrasive cut-off wheel (water-cooled). The use of Oxy-fuel cutting equipment is not recommended. The heat imparted to the SLS600® material should be kept to a minimum. Care must be taken to cool the inner surface. The hardness of the inner surface will begin to decrease as temperatures approach 500°F (260°C).
Inspect surfaces to be welded – avoid welding areas that have tears, cracks and other discontinuities. Clean joint area at least 1/2˝ from welding joint; remove all loose scale, rust, moisture, grease, etc. Position parts into as close contact as practical; root opening should not exceed 3/16˝. For separations greater than 1/16˝, increase the leg of fillet weld by the amount of the opening.
If ambient temperature of parts is below 70°F, preheat the weld zone and 6˝ of the adjacent. Care must be taken to cool the inner surface. The hardness of the inner surface will begin to decrease as temperatures approach 500°F (260°C).
Aim a gentle stream (4 to 6 GPM) of water at the inside of the pipe at weld arc area. Position the pipe so that the water run-off is bathing the previously welded areas. The water should not contact the exterior of the pipe. Ap ply a ¼˝ maximum weld fillet weld (per pass). Rotate the pipe during the welding process to eliminate excessive starting and stopping of weld.
Place the welds on the exterior of the pipe, keeping weld beads as small as possible; no larger than 5 inches in length. Allow the pipe to cool before applying additional beads. Always use stringer beads; avoid weaving beads. Weld using multiple passes – five to six passes for 3/8˝ fillet welds, ten t o twelve passes for 1/2˝ fillet welds.