Billets & Blooms

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Uses: Feedstock into making of long products like TMT Rebars, Structures, Rods, Sections.

Sizes: 65×65, 75×75, 77×77, 90×90, 100×100, 125×125, 150×150, 200×200, 250×250, 320×250

Grades: Carbon Steel and Special Steel

Standards: ASTM, IS, BS, EN

Length: Standard 12m, Custom sizes accepted

 

Billets and blooms are semi-finished casting products produced in a steel mill that need further processing to end up as a finished good. Billet and Blooms generally differ in their sizes. Billets come in square cross section, whereas Blooms come in both square and rectangular cross sections. Billets have a square cross-section area of less than 36 sq. inches. Blooms cross-section must be greater than 36 sq. inches.

About our in-stock

AS Steel generally in-stocks MS Blooms and MS Billets with a standard length of 12m (Can be customized as per customer requirement). Made by RINL (Rashtriya Ispat Nigam Limited), there are variances of a cross-section from 65-320 sq.inches. Having a huge variety of special grades available in steel billets and steel blooms, detailed list can be viewed in the given link: https://us.assteels.com/wp-content/uploads/2020/02/Billets.pdf

Product Manufacturing Process

Iron Ore is a major raw material of this product. This iron ore is melted in the furnace, the liquid material so obtained is then poured into CCM (continuous casting machine). The continuous casting machine is then making the Billets of required cross-section and length. Steel Billets are generally made with mild steel with a density of 7.85gm/cm3. At the same time, special grades are also available.

Application

Billets and blooms generally act as a feedstock for commercial Steel products like bars, rods, tubes, pipes, wire, and wire products. These products are extruded from Billets and Blooms into the fine end products with the help of a continuous rolling process and thermo-mechanical treatment, where applicable. Billets also have direct usage in the manufacture of products that go into CNC machines, military weapons, lathes, steel building vehicles, and so on.

Chemical Composition

In steel classes, the chemical composition and its allowed range are prescribed, and they significantly affect thermo-physical properties of steel, e.g. the thermal conductivity, specific heat, density, enthalpy, contractility, and viscosity. Chemical composition varies according to the grades of billets. Its major components are Carbon, Manganese, Phosphorous, Sulfur, Silicon, Aluminium, Chromium

Note: The Chemical composition changes according to the grades of billets and blooms. https://us.assteels.com/wp-content/uploads/2020/02/Billets.pdf

Industry Standards:

Below are the industrial standards for billets and blooms

A314 – 19

A484 / A484M – 20a

A604 / A604M – 07(2017)

A646 / A646M – 17 

Special Grades

SAE 1541 SAE 1008 SAE 1020 SAE 1022 SAE 1023S
SAE 1029S SAE 1030 SAE 1049 EN8 EN8 D
EN9 SAE 1524S SAE 1524Cr 55Si7 60Si7
65Si7 A 105 SUP9 40CR4 41CR4
EN15B SAE 1018 27C15 EN32B 20MNCR5
16MNCR5 SUP 11A 35C8 CK-45 VIZAG TLT
37C15 SAE 1010 SAE 1012S SAE 1020 SAE 1023S
SAE 1030 EN8 EN8D EN9 SAE 1049
SAW 1541 SAE 1542S SAE 1542Cr 37C15 EN32B
27C15 SAE1018 A105 20MnCr5 40CR4
55Si7 60Si7 EN43D 35C8 CK-45

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