On March 19, 2020 the us international trade commission (ITC) vote on imports from China and India's carbon alloy a572 grade 50 properties steel screw (Carbon and Alloy Steel Threaded Rod) to make a positive final anti-dumping and anti-subsidy industry damage. All five members of the international trade commission voted in favor of the ruling. The us department of commerce will issue anti-dumping and countervailing duty orders on imports of a572 grade 50 properties carbon alloy steel screws from China and India, according to the itc's affirmative ruling.
The density of wear-resistant plate is higher than that of some materials, a572 grade 50 properties, which makes its hardness larger. The density of steel for wear-resistant plate is 7.85kg/dm cubic. After quenching, martensite structure is obtained and tempered at 450-600℃, or 350-600℃ after tempering at 650℃. Or after tempering at 650℃ and heating at 350-650℃ for a long time, the wear-resistant plate will be embrittled. If the brittle wear-resistant plate is reheated to 650℃ and then cooled quickly, the toughness can be restored, so it is also called reversible temper brittleness. High temperature temper brittleness is the increase of the transition temperature from toughness to brittleness.
A514 grade Q alloy structural steel chemical composition (melting analysis)%C: 0.14-0.21, Si: 0.15-0.35, Mn: 0.95-1.30, P max.: 0.035, S max.: 0.035, Ni: 1.20-1.50, Cr: 1.00-1.50, Mo: 0.45-0.6.0, V: 0.03-0.08The mechanical properties in thickness (mm)T≤65Yield strength (≥Mpa): 690Tensile strength (Mpa):760-895Elongation in ≥,%: 18
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