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A coil of hot-rolled steel Hot-rolled metals generally have little directionality in their mechanical properties or deformation-induced residual stresses . However, in certain instances non-metallic inclusions will impart some directionality and workpieces less than 20 mm (0.79 in) thick often have some directional properties.
Hot-rolled as rolled cut length 50 70 1.40 22 Hot-rolled as rolled coils 45 65 1.44 22 Hot-rolled annealed 45 65 1.44 22 Cold-rolled 45 65 1.44 22 Hot-rolled and cold-rolled high-strength low-alloy columbium and/or vanadium steel sheet and strip A607 Class I Gr.45 45 60 1.33 Hot rolled (23) Cold rolled (22) Gr.50 50 65 1.30 Hot rolled (20)
After cooling, slab is rolled at the hot rolling mill, creating hot coils (thickness: 1.5–16 mm). Some are sold; others go to the hot finishing mill for complementary work and hot sheet transformation or the cold rolling mill to lower strip thickness to 0.18 mm. Cold rolled coils are also dedicated for the tinning , galvanizing , and ...
POSCO (formerly Pohang Iron and Steel Company) is a South Korean steel manufacturer headquartered in Pohang, South Korea.It had an output of 42,000,000 metric tons (41,000,000 long tons; 46,000,000 short tons) of crude steel in 2015, making it the world's sixth-largest steelmaker by this measure. [2]
Mill scale on an anvil. Mill scale, often shortened to just scale, is the flaky surface of hot rolled steel, consisting of the mixed iron oxides iron(II) oxide (FeO, wüstite), iron(III) oxide (Fe 2 O 3, hematite), and iron(II,III) oxide (Fe 3 O 4, magnetite).
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Hot rolling (HR): slabs and blooms are reheated in a furnace and hot-rolled. Hot rolling reduces the thickness of the slabs to produce about 3 mm (0.12 in)-thick coils. Blooms, on the other hand, are hot-rolled into bars, which are cut into lengths at the exit of the rolling mill, or wire rod, which is coiled.
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