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Recrystallization means that when the annealing temperature is high enough and the time is long enough, strain-free new grains (recrystallization cores) are produced in the fiber structure of the deformed metal or alloy, and the new grains continue to grow until the original deformed structure is completely disappear, and the properties of the metal or alloy also change significantly.
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Angle Steel

Angle joint sheet, also known as angle iron, is a long strip of steel with two sides perpendicular to each other. There are equilateral angle steel and unequal angle steel. The width of both sides of the equilateral angle steel is equal. Its specifications are expressed in millimeters of side width × side width × side thickness. Angle iron is a long strip of steel with two sides perpendicular to each other.
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Steel Plate

The width of thin plates is 500~1500 mm; the width of thick plates is 600~3000 mm. Thin plates are divided by steel type, including ordinary steel, high-quality steel, alloy steel, spring steel, stainless steel, tool steel, heat-resistant steel, bearing steel, silicon steel and industrial pure iron thin plates; according to professional use, there are plates for oil drums, Enamel plates, bulletproof plates, etc.; according to surface coating, there are galvanized sheets, tin-plated sheets, lead-plated sheets, plastic composite steel sheets, etc.
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Channel Steel

Channel steel is divided into ordinary channel steel and light channel steel. The specifications of hot-rolled ordinary channel steel are 5-40#. The specifications of hot-rolled modified channel steel supplied by agreement between the supplier and the buyer are 6.5-30#. Channel steel is mainly used in building structures, vehicle manufacturing, other industrial structures and fixed panels. Channel steel is often used in conjunction with I-beams.
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T-shaped steel

T-shaped steel is directly split from H-shaped steel. The usage standard is the same as H-shaped steel (GB/T11263-2017). It is an ideal material to replace the welding of double angle steel. It has the advantages of strong bending resistance, simple construction, cost saving and light structural weight.
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I-beam

Whether I-shaped steel is ordinary or light, due to the relatively high and narrow cross-sectional dimensions, the moment of inertia of the two main axes of the cross-section is quite different, so it can only be directly used for bending in the plane of its web.
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H-beam

H-shaped steel is an economical cross-section and high-efficiency profile with more optimized cross-sectional area distribution and more reasonable strength-to-weight ratio. It is named because its cross-section is the same as the English letter "H".
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