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ARMCO® Pure Iron
ARMCO® Telar 57

Product Description

Developed 1909 by the former American Rolling Mill Company, ARMCO® Pure Iron soon became the synonym for the purest steel mill produced iron with a purity of more than 99.85 % Fe. The first heat of ARMCO® Pure Iron to be produced in Europe was cast in Germany at 'Vereinigte Stahlwerke AG' (today: ThyssenKrupp Steel).

In 1957 ARMCO® Telar 57 was developed as a non-aging variant of ARMCO® Pure Iron, in order to satisfy the specific needs of the electrical industry.

Even after a century of technical progress ARMCO® Pure Iron, because of its special properties, is still a very modern and widely used material satisfying various requirements of many modern day industries. Its unique characteristics, its numerous applications ranging from remelting to electromagnetic components and various delivery forms from remelting billet to pyrometer protection tube are described on the following pages.

 


Characteristics

  • ARMCO® Pure Iron:
    • Purest iron ever produced, Fe = 99.85%
    • Homogenous structure of pure ferrite containing exceptionally low level of carbon, oxygen and nitrogen, combined with a low incidence of non-metallic inclusions
    • Compared with mild steels the high purity results in a number of advantages such as:
      • Better resistance to corrosion, oxidation and chemical attack
      • Excellent electrical and magnetic properties
      • Excellent cold working properties
      • Excellent weldability
  • ARMCO® Telar 57:
    • Soft magnetic iron providing excellent resistance to magnetic aging effects
    • High magnetic flux density
    • Low coercive force

Chemical Composition

ARMCO® Pure Iron Grade 1* Grade 2 Grade 3* Grade 4
% max. max. max. max.
Carbon (C) 0.020 0.010 0.010 0.010
Manganese (Mn) 0.20 0.10 0.08 0.06
Phosphorus (P) 0.015 0.010 0.010 0.005
Sulphur (S) 0.015 0.008 0.005 0.003
Nitrogen (N) 0.007 0.006 0.005 0.005
Copper (Cu) 0.06 0.03 0.03 0.03
Cobalt (Co) ** ** ** 0.005
Tin (Sn) 0.010 0.010 0.010 0.005

* no regular production
** values not determined

ARMCO® Telar 57 Telar 57 N Strip Telar 57 S Bar, Wire
% max. max.
Carbon (C) 0.015 0.020
Silicon (Si) Traces Traces
Manganese (Mn) 0.25 - 0.35 0.35 - 0.50
Phosphorus (P) 0.02 0.02
Sulphur (S) 0.015 0.015 - 0.030
Nitrogen (N) 0.005 0.005
Copper (Cu) 0.07 0.07
Aluminium (Al) 0.05 - 0.10 0.05 - 0.10

Applications


Delivery Program

ARMCO® Pure Iron Semi-Finished Remelting

  • Billets / Blooms

    sq. 80 - 200 mm
    Length from 300 to 8,000 mm

    Material black or shot-blasted

  • Slabs

    218 x 2,400 mm max.
    Length from 1,000 to 9,000 mm

  • Ingots

    320 x 320 mm
    Length from 1,000 to 5,000 mm

  • AME Blooms

    sq. 620 mm
    sq. 800 mm

ARMCO® Pure Iron
ARMCO® Telar 57 Finished Products

  • Roundbars, hot rolled

    Dia 20 - 180 mm

  • Roundbars, cold finished

    Dia 60 mm max.

  • Flatbars, hot rolled

    20 x 12 - 40 x 12 mm

  • Squarebars, hot rolled

    sq. 20 - 40 mm

  • HR Plates / HR Coils (wide and slit coil)

    Thickn. 3 - 115 mm

  • Cut Plates / Circular Blanks

    Acc. to customer's request / drawing

  • CR Sheets / CR Coils (wide and slit coil)

    Thickn. 0.8 - 2.99 mm

  • CR Slit Strip (Precision Strip)

    Thickn. 0.4 - 4.0 mm
    Width 4.0 - 320 mm

  • Wire Rod, in coils

    Dia 5.5 - 25 mm

  • CD Wire, in coils

    Dia 13 mm max.

  • Pyrometer Protection Tubes, seamless drawn

    22 x 5 mm

Other dimensions and forms on request!


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AK Steel Corporation
9227 Centre Pointe Drive
West Chester, Ohio 45069
(513) 425-5000

Customer Service
(800) 331-5050
(513) 425-4200

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