Alloy Structural Steel
Alloy structural steel has suitable hardenability and after suitable metal heat treatment, the microstructure is uniform sorbite, bainite or extremely fine pearlite, so it has high tensile strength and yield ratio. (generally around 0.85), higher toughness and fatigue strength, and lower toughness-brittleness transition temperature, can be used to manufacture machine parts with larger cross-sectional dimensions.
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(1) Building and engineering steel: a. Ordinary carbon structure steel; b. Low alloy structure steel; c. Reinforced steel.
a. Machinery manufacturing steel: (A) Growth structure steel; (b) Surface hardening structural steel: including carburizing steel, ammonia, surface quenching steel; (C) cold plastic forming steel: including cold stamping for stamping Steel and cold pupa.
b. Spring steel
c. Bearing steel
(3) Tool steel: a. Carbon tool steel; b. Metal tool steel; c. High -speed tool steel.
(4) Special performance steel: a. Stainless acid -resistant steel; b. Heat -resistant steel: including antioxidant steel, heat -strong steel, gas valve steel; C. Electric heating alloy steel; D. wear -resistant steel; ; F. Electrician steel.
(5) Professional steel -such as bridge steel, ship steel, boiler steel, steel container, steel, and steel for agricultural machinery.