A572 Gr 345 steel Vs SPA-H rusty steel for sculpture

Cleveland cliffs announced on March 13 that it had completed the acquisition of AK SPA-H rusty steel for sculpture steel, foreign media reported In the transaction of holding), shareholders of Cleveland cliffs and AK steel respectively voted on the US billion acquisition agreement at their respective shareholders' meeting to complete the resolutions required for the announcement of acquisition of AK steel SPA-H rusty steel for sculpture at the beginning of the year. The acquisition is Cleveland cliffs' first foray into steel manufacturing.

The main function of boron in SPA-H rusty steel for sculpture and so on steel is to increase the hardenability of steel, so as to save other rare and precious metals, such as nickel, chromium and molybdenum. For this purpose, the boron content is generally regulated in the range of 0.001% - 0.005%. It can replace 1.6% nickel, 0.3% chromium or 0.2% molybdenum. It should be noted that molybdenum can prevent or reduce temper brittleness, while boron slightly promotes temper brittleness, so molybdenum can not be completely replaced by boron.

asme sa514 gr C quenched and tempered alloy steel plate element composition%
C: 0.02-0.20, Si: 0.15-0.30, Mn: 1.10-1.50, P max.: 0.035, S max.: 0.035, B max.: 0.005, Mo: 0.15-0.30
The mechanical properties in thickness (mm) T≤65
Yield strength (≥Mpa): 690
Tensile strength (Mpa):760-895
Elongation in ≥,%: 18

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