Why is flux cored metal welding better than metal cored welding
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As its name implies, the gas-shielded type of flux-cored wire requires an external shielding gas. The self-shielded variety does not. The flux coating on gas shielded flux-cored wires solidifies faster than the molten weld material. ... Gas-shielded flux wires work well when welding thicker metals.
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Considered to have some characteristics similar to flux cored wires and other characteristics similar to solid wire, metal cored wires do share a similar construction to flux cored wires and performance similar to solid MIG wires. The outer metallic sheath of a cored wire conducts the electrical current for welding.
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