L450M spiral steel pipe is a kind of steel pipe in API5L specification, belonging to high-strength pipeline steel pipe, mainly used for transporting oil, gas, water and other liquids.
If the L450M steel pipe is not melted during welding, the following treatment is required: clean the weld: check whether the weld has impurities, oxides, etc.
If cleaning is required, ensure that the weld surface is dry and clean. Adjust welding parameters: check whether the parameters of welding equipment and power supply are correct, and adjust welding current, voltage, welding speed and other parameters.
Change the welding method: If the adjustment parameters are invalid, consider changing the welding method, such as changing the welding method.
"1. Spiral steel pipe and straight seam steel pipe adopt L450M. Standard: GB/T9711.2. Steel grade: L450M. Chemical composition: C0.16, Si0.45, Mn1.6, P0.025, S0.02, V0.1. 5.0. Stress with total elongation of 5%: 450~570, tensile strength: Rmmin535Mpa, 7. Elongation: (Lo=5.65) √ S.)." L450 is a kind of material, belongs to pipeline steel grade, and is mostly used in natural gas pipelines.
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