bp440 steel use for strong box charpy impact test temperature

The hot rolling method is to heat the BP440 steel use for strong box steel material to about 1000 ℃ ~ 1250 ℃ and use the rolling mill to roll it. The traditional hot rolling process is generally divided into the following two steps: the first step is to use the primary rolling mill or billet rolling mill to roll the ingot, billet or continuous casting billet into a certain shape and size of billet. This kind of BP440 steel use for strong box rolling process is usually called semi-finished product production, also called blank production.

The steel grades BP440 steel use for strong box of thick steel plate are basically the same as those of thin steel plate. In terms of steel types, in addition to the bridge steel plate, boiler steel plate, automobile manufacturing steel plate, pressure vessel steel plate and multi-layer high-pressure vessel steel plate, some kinds of BP440 steel use for strong box steel plates, such as automobile girder steel plate (2.5-10 mm thick), checkered steel plate (2.5-8 mm thick), stainless steel plate, heat-resistant steel plate, etc., are crossed with the thin plate.

Turkey produced 8.97 million metric tons of crude steel in the first quarter, with a 9.6 percent increase from the same month of last year. Iran's crude BP440 steel use for strong box steel production in March amounted to 6.75 million mt. up by 13.2 percent year on year. The CIS registered a BP440 steel use for strong box crude steel output of 25.15 million mt. falling by 0.6 on year-on-year basis, with Russia producing 17.9 million mt, down by one percent, and Ukraine producing 5.32 million mt, falling by 3.4 percent, both on year-on-year basis.

BP440 steel use for strong box, 30CrNi3MoV high strength steel is mainly used as structural material for key parts of a major weapon model. Chemical composition of 30CrNi3MoV (675): C: 0.26-0.32, Si: 0.15-0.35, Mn: 0.30-0.50, P: ≤ 0.015, S: ≤ 0.010, Cr: 0.60-1.00, Ni: 2.80-3.20, Mo: 0.40-0.50, Re: 0.06-0.13, V: 0.06-0.013.

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