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Kencotube is well-known supplier of Black Bars, which are formed in rolling mill by heating material like billet, blooms, and so on at temperature about 1200 Degree C in the course of several rolls to attain the desired size and shape. Stainless Steel Black Bars are produced by passing through dies in a cold condition or by turning the bars in a peeling machine and some other processes. Carbon Steel Black Bars are drawn through dies of the required shape. Alloy Steel Black Bars is chosen depending on the shape to be drawn. The grinding process in Alloy 20 Black Bars is used to narrow the tolerances and improve the surface finishes of the above two processes. Duplex Steel Black Bars increase the yield strength and tensile strength, where it also eradicates a several surface limitations produced because of the rolling method.
Super Duplex Steel Black Bars are turned to the desired sizes. Monel Black Bars are used where specific tolerances are required such as for use in CNC machines, etc. In Inconel Black Bars, sometimes heat treatment such as annealing is done before cold finishing. Due to the nature of the process and temperatures involved, precise control of tolerances cannot be achieved in Nickel Alloy Black Bars. Therefore Hastelloy Black Bars are further processed to make steel bright bars for processes that require more precise accuracies. As a result Titanium Alloy Black Bars are less expensive than bright bars.
|Specification||ASTM, ASME, API|
|Size||from 2.00mm to 6.35mm (0.078" to 0.25") dia|
|Thickness||5 mm To 500 mm thick in 100 mm TO 6000 mm|
|Condition||Cold Drawn & Polished, Cold Drawn, Centreless Bright & Polished|
Stainless Steel Black Bars : ASTM A276, ASTM A484 SS 201, 202, 301, 302, 303, 304, 304H, 304L, 316, 316H, 316L, 309, 309S, 310, 310S, 316Ti, 317, 317L, 347, 321, 321H, 410, 416, 420, 430, 430F, 431, 440C, 630, 17-4PH, F51
Duplex & Super Duplex Steel Black Bars : ASTM / ASME SA276, SA479 UNS NO. S31803 , S32205 , S32550, S32750, S32760.
Carbon Steel Black Bars : ASTM A105 / ASME SA105, ASTM A350 LF2, LTCS
Alloy Steel Black Bars : ASTM / ASME A 182 GR F 5, F 9 , F 11 , F 12 , F 22 , F 91; ASTM / ASME A 729 GR B 11 & B 22
Nickel Alloy Black Bars : ASTM B160 / ASME SB160, Nickel 200 (UNS No. No2200), Nickel 201 (UNS No. N02201), ASTM / ASME SB 164 Monel 400 (UNS No. N04400), Monel 500 (UNS No. N05500), Inconel 800 (UNS No. N08800), ASTM / ASME SB 425 Inconel 825 (UNS No. N08825), ASTM / ASME SB 166 Inconel 600 (UNS No. N06600), Inconel 625 (UNS No. N06625), Inconel 601 (UNS No. N06601), ASTM / ASME SB 574 Hastelloy C 276 (UNS No. N10276), Alloy 20 (UNS No. N08020), Titanium (Grade I & II).
Copper Alloy Black Bars : ASTM / ASME SB 111/151, UNS NO. C 92200, UNS NO. C 83600, UNS NO. UNS NO C 10100, C 10200, C 10300, C 10800, C 12000, C 12200, Cupro Nickel 90/10 (C 70600), Cupro Nickel 70/30. (C 71500).
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