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4140/42 and 4130 Mechanical Tubing are medium carbon alloy grades, which are widely used for many general-purpose applications that require high tensile strength and toughness. The addition of chromium and molybdenum as alloying elements, combined with heat treatment, provides the combined advantage of hardness, ductility, and strength.China Thick Wall Square & Rectangular Steel Tube Suppliers china supplier thick square steel tubeAs one of the leading Thick Wall Square & Rectangular Steel Tube manufacturers and suppliers in China, we warmly welcome you to buy or wholesale bulk Thick Wall Square & Rectangular Steel Tube in stock here and get free sample from our factory. All products made in China are with high quality and competitive price.

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