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HTS-528 braze welds all cast iron, brass, nickel, copper, and more than 50 different kinds of steel, including stainless. It is the strongest brazing rod made for joining these metals, and is thin flowing for close-fit joints. It also effectively joins dissimilar metals.
It has a built in flux and Master Welders rate its wetness on ferrous and non-ferrous metals as excellent, and while it is very hard, it is still machinable.
HTS-528 is the perfect rod to use for high-heat applications up to 1400°F (760°C), such as a cast iron manifold, or for high-stress areas, including joining cast iron ears or repairing cracks in blocks.
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Tensile Strength
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100,000 PSI
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Hardness
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92 Brinell
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Flow
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Excellent
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AWS Spec
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A 5.7
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Bonding Temperature
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1400°F
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Elongation
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30%
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Fuming
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Low
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Length, unless otherwise specified is 18 inches (approx 455mm).
Diameter supplied approximately 3mm (1/8”).
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Just 4 simple steps:
- To open the pores around the area to be repaired, drill, and grind out a U shape in the metal, so it is no longer a hairline crack.
- Heat the metal - the 528 rod takes extreme heat, above 1400°F (760°C) to penetrate the pores of the metal. Test the rod on the metal 1/4 inch (6mm) outside the bulk of the flame. The rod has a flux core that will melt much lower than the rod, so if the rod itself will not melt, have patience.
- When you are close to 1400°F (760°C), it will look like you're going to burn a hole in the metal but do not worry. Once you see the rod itself is melting, rub the rod all around the area to be repaired. The rod will melt and, with the help of the flux core, will fuse down into the metal.
- When you pull the torch, it will be cherry red for about 20 seconds. If you have followed the instructions explicitly and rubbed the rod all around the area to be repaired thoroughly, you will have the strongest weld possible on that particular metal. You may then grind, shape, polish, and paint as desired.
Hints:
- Melting the base metal is unnecessary and undesirable as the 528 rod is for braze welding rather than fusion welding.
- Clearance of around .003” will give the maximum tensile and shear strength.
- We recommend first practicing with cast iron by grinding a slot 1/16th to 1/8th of an inch into the metal. Use a brazing or cutting tip to bring the metal to 1400 degrees. The metal will start to turn red at 600 degrees, but continue heating.
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