Exporter of ASTM A1126 Pure Iron 99.90% Sheets, Plates, Rods, Bars, Strips, Wires Scrap

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ASTM A1126-23
Standard Specification for Magnetic Pure Iron

This specification covers the requirements for mill-cast and wrought magnetic pure iron containing no more
than 0.00600% carbon and a typical total iron content of 99.90%. The magnetic characteristics exhibited by
magnetic pure iron are made possible by the absence of alloying elements during production.

This specification also covers magnetic pure iron supplied in a form and condition which allows for
subsequent heat treatment to achieve desired magnetic characteristics.

Magnetic pure iron may be supplied in forms including hot-rolled strip, sheet, plate, bar, billet, and slab;
cold-rolled strip and sheet; mill-cast slab and bloom; forgings; and drawn wire and rod.

This specification does not cover cast parts or iron powders capable of being processed into magnetic components.
Please refer to the following ASTM standards for information regarding powdered metal materials and magnetic
components: Specifications A811, A839, and A904.

This specification does not cover material that contains constituent elements sufficient to increase the carbon content
above 0.00600% or to decrease the iron content below 99.90%. Refer to Specification A848 for properties of
low carbon magnetic iron.

Designation: A1126 – 23
Standard Specification for
Magnetic Pure Iron1

  1. Scope
    1.1 This specification covers the requirements for mill-cast
    and wrought magnetic pure iron containing no more than
    0.0060 % carbon and a typical total iron content of 99.9 %. The
    magnetic characteristics exhibited by magnetic pure iron are
    made possible by the absence of alloying elements during
    production.
    1.2 This specification also covers magnetic pure iron sup-
    plied in a form and condition which allows for subsequent heat
    treatment to achieve desired magnetic characteristics.
    1.3 Magnetic pure iron may be supplied in forms including
    hot-rolled strip, sheet, plate, bar, billet, and slab; cold-rolled
    strip and sheet; mill-cast slab and bloom; forgings; and drawn
    wire and rod.
    1.4 This specification does not cover cast parts or iron
    powders capable of being processed into magnetic compo-
    nents. Please refer to the following ASTM standards for
    information regarding powdered metal materials and magnetic
    components: Specifications A811, A839, and A904.
    1.5 This specification does not cover material that contains
    constituent elements sufficient to increase the carbon content
    above 0.0060 % or to decrease the iron content below 99.9 %.
    Refer to Specification A848 for properties of low carbon
    magnetic iron.
    1.6 The values stated in SI units are to be regarded as
    standard. The values given in parentheses are mathematical
    conversions to customary (cgs-emu and inch-pound) units
    which are provided for information only and are not considered
    standard.
    1.6.1 There are selected values presented in two units, both
    of which are acceptable SI units. These are differentiated by the
    word “or,” as in “g/cm3, or, (kg/m3).”
  2. Referenced Documents
    2.1 ASTM Standards:2
    A34/A34M Practice for Sampling and Procurement Testing
    of Magnetic Materials
    A340 Terminology of Symbols and Definitions Relating to
    Magnetic Testing
    A341/A341M Test Method for Direct Current Magnetic
    Properties of Soft Magnetic Materials Using D-C Per-
    meameters and the Point by Point (Ballistic) Test Methods
    A596/A596M Test Method for Direct-Current Magnetic
    Properties of Materials Using the Point by Point (Ballistic)
    Method and Ring Specimens
    A773/A773M Test Method for Direct Current Magnetic
    Properties of Low Coercivity Magnetic Materials Using
    Hysteresigraphs
    A811 Specification for Soft Magnetic Iron Parts Fabricated
    by Powder Metallurgy Techniques
    A839 Specification for Iron-Phosphorus Powder Metallurgy
    Parts for Soft Magnetic Applications
    A848 Specification for Low-Carbon Magnetic Iron
    A904 Specification for 50 Nickel-50 Iron Powder Metal-
    lurgy Soft Magnetic Parts
  3. Terminology
    3.1 The terms and symbols used in this specification, unless
    otherwise noted, are defined in Terminology A340.
  4. Ordering Information
    4.1 Orders to this specification shall include as much of the
    following information as is required to describe the desired
    material:
    4.1.1 ASTM specification number;
    4.1.2 Dimensions and Tolerances—Dimensional tolerances
    are to be mutually agreed upon between the user and the
    producer or supplier;
    4.1.3 Quantity (weight or number of pieces);
    4.1.4 Form and condition;
    4.1.5 Magnetic property requirements if they are other than
    stated herein;
    4.1.6 Certification of chemical analysis or magnetic prop-
    erty evaluation, or both;
    4.1.7 Marking and packaging;
    4.1.8 End Use—Whenever possible, the user should specify
    subsequent processing such as machining, blanking, forging, or
    deep drawing to shape. This information will help the supplier
    provide the most suitable product for the user’s fabrication
    practice; and
    4.1.9 Exceptions to this specification or special require-
    ments.
  5. Chemical Composition
    5.1 Magnetic pure iron supplied to this specification shall
    conform to the chemical composition requirements shown in
    Table 1.
    5.1.1 By agreement between user and producer or supplier,
    analysis may be required, and limits established for elements
    not specified in the table of chemical composition.
  6. Form and Condition
    6.1 Magnetic pure iron is capable of being produced in a
    wide variety of forms and conditions for fabrication into
    magnetic components. The desired form and condition should
    be discussed with the supplier to assure receiving a product
    suitable for the intended purpose. Available forms and condi-
    tions may include:
    6.1.1 Hot-Rolled Product—Hot-rolled; hot-rolled and acid
    cleaned; hot-rolled, annealed, and acid cleaned; hot-rolled and
    mechanically cleaned.
    6.1.2 Cold-Rolled Product—Cold-rolled; cold-rolled and
    annealed; cold-rolled and mechanically cleaned; cold-drawn;
    cold-drawn and annealed.
    6.1.3 Billet and Bar—Hot or cold worked, may have surface
    conditioned by grinding.
    6.1.4 Forgings.
  7. Magnetic Property Requirements
    7.1 Density—The density for test purposes is 7.86 g/cm3, or,
    (7860 kg/m3).
    7.2 Test Specimen—The test specimen size and shape shall
    conform to Practice A34/A34M. Shapes such as ring
    laminations, solid rings, Epstein specimens, or straight lengths
    having a uniform cross section are preferred. If, however, it is
    impossible to prepare a preferred test specimen shape from the
    as-manufactured product, specimen shape and size shall be
    mutually agreed upon by the user and producer or supplier.
    7.3 Heat Treatment—When testing of heat-treated speci-
    mens is requested by the user, the following method shall be
    used: in a reducing atmosphere, inert atmosphere, or vacuum,
    temperature shall be held at 845 °C (1553 °F) for up to two
    hours and cooled at a rate from 55 °C to 100 °C per hour
    (131 °F to 212 °F per hour) to 500 °C (932 °F), and cooled at
    any rate thereafter. Use of a heat treatment method other than
    the method described above shall be subject to agreement
    between the supplier or producer and user. While the magnetic
    properties of magnetic pure iron are often sufficient as
    produced, certain desired magnetic properties require heat
    treatment to achieve. See Appendix X2 for a discussion of heat
    treatment.
    7.4 Test Method—Magnetic testing shall be conducted in
    accordance with Test Methods A341/A341M, A596/A596M,
    or A773/A773M. Under this specification, magnetic polariza-
    tion and relative maximum permeability shall be measured
    when reporting of magnetic characteristics is required by the
    user.
    7.5 Requirements—Magnetic polarization (J) and relative
    maximum permeability (µm) shall meet the requirements in
    Table 2.
  8. Rejection and Rehearing
    8.1 Material that fails to conform to the requirements of this
    specification may be rejected by the user. The rejection shall be
    reported to the supplier or producer promptly and in writing.
    The rejected material shall be set aside, adequately protected
    and correctly identified. The disposition of rejected parts shall
    be subject to agreement between the supplier or producer and
    user.
    8.2 The supplier or producer may make a claim for rehear-
    ing. In this event, the user shall make samples that are
    representative of the rejected material available to the supplier
    or producer for evaluation.
    TABLE 1 Chemical Composition Requirements
    (Weight Percent As Cast)
    Carbon, max 0.006
    Manganese, max 0.055
    Phosphorus, max 0.006
    Sulfur, max 0.004
    Nitrogen, max 0.006
    Copper, max 0.030
    Cobalt, max 0.003
    Silicon, max 0.010
    Aluminum, max 0.005
    Titanium, max 0.005
    Iron Balance
    TABLE 2 Magnetic Property Requirements
    Unannealed Annealed
    Magnetic Polarization, minA 2.0 T 2.0 T
    Relative Maximum Permeability, minB 1750 11 000
    A Magnetic polarization tested at a magnetic field strength of 25 000 A/m (314 Oe).
    B Relative maximum permeability tested at any necessary magnetic field strength.
    A1126 – 23
  9. Certification
    9.1 When specified in the purchase order or contract, the
    user shall be furnished certification that samples representing
    each lot have been either tested or inspected as directed in this
    specification and the requirements have been met. When
    specified in the purchase order or contract, a report of the test
    results shall be furnished.
  10. Packaging and Marking
    10.1 Packaging shall be subject to agreement between the
    supplier or producer and user.
    10.2 Material furnished under this specification shall be
    identified by the name or symbol of the supplier, by unique
    identification number, and material size. Each heat supplied on
    a given order must be identified separately.
  11. Keywords
    11.1 coercive field strength; magnetic field strength; mag-
    netic flux density; magnetic polarization; magnetic pure iron;
    relative maximum permeability; 99.9 % iron
    APPENDIXES
    (Nonmandatory Information)
    X1. TYPICAL PROPERTIES
    X1.1 Typical physical and mechanical properties are shown
    in Table X1.1.
    NOTE X1.1—All values are typical of hot-rolled magnetic pure iron in
    the as-rolled condition.
    X1.2 Typical magnetic properties are shown in Table X1.2.
    NOTE X1.2—All values are typical of hot-rolled magnetic pure iron
    tested in accordance with Test Method A773/A773M.
    X2. HEAT TREATMENT OF MAGNETIC PURE IRON
    X2.1 In many instances, parts fabricated from magnetic
    pure iron exhibit sufficient magnetic properties without subse-
    quent heat treatment.
    X2.2 In cases where manufacturing techniques induce sig-
    nificant stress in fabricated parts, it is beneficial to use a heat
    treatment method with a temperature greater than 900 °C
    (1652 °F).
    X2.3 Small amounts of carbon can be detrimental to the
    magnetic characteristics of magnetic pure iron. Caution should
    be used to mitigate contamination by carbon-bearing materials
    in the furnace.
    TABLE X1.1 Typical Physical and Mechanical Properties
    Specific Gravity (20 °C) 7.86
    Specific Resistance (20 °C) 0.11 µW·m
    Linear Thermal Expansion Coefficient
    (0 °C to 100 °C)
    12 × 10-6/°C
    Hardness, max 60 HB to 90 HB
    Yield Strength (0.2 % Offset) 130 MPa to 180 MPa
    Tensile Strength 240 MPa to 275 MPa
    % Elongation (L = 5d) 40 to 60
    TABLE X1.2 Typical Magnetic Properties
    Unannealed Annealed
    Coercive Field StrengthA 50 A /m to 150 A /m
    (0.628 Oe to 1.88 Oe)
    15 A /m to 50 A/m
    (0.188 Oe to 0.628 Oe)
    Relative Maximum
    Permeability 1750 to 8000 11 000 to 20 000
    A Coercive field strength measured from a magnetic polarization of 1.5 T to allow
    for better resolution.
    A1126 – 23

Our testing items include to:
Magnetization curve
Magnetic induction
Coercive Force
Permeability
Curie temperature
Hysteresis loss
Resistivity power dissipation
Standards we test to
ASTM A804, ASTM A773, ASTM A341, ASTM A598, ASTM A889, ASTM A596, ASTM A977, ASTM A343, ASTM A1036, ASTM A912
ISO 8063, ISO 8462

Inspection & Approval Certificates : C/W Certificate (Calibration Works Certificate) EN 10204 3.1 / DIN 50049 3.1 / ISO 10474 3.1 Mill Test Certificate,
NACE HIC TM-0284 / NACE MR-0103 / NACE MR-0175 / ISO 15166, BS EN 9001, BS EN 9100, AS 9100D, IATF 16949, NADCAP Certified, CE Marked,
European Pressure Equipment Directive PED-2014/68/EU, AD-2000-WO, ASME Boiler & Pressure Vessel Code Section-II Part A Edition 2019,
API 6A (American Petroleum Institute), with 3.2 Certificate duly Certified & Approved by IBR (Indian Boiler Regulations), LR Class (Lloyd’s Register),
GL (Germanischer Lloyd), BV (Bureau Veritas), DNV (Det Norske Veritas), ABS Class (American Bureau of Shipping), SGS, TUV, RINA,
IR Class (Indian Register of Shipping), NORSOK Approved Standard M-630, M-650 Rev.3

If you have any requirement of above items, please feel free to contact us

Regards,

CONTACT PERSON :

MUKESH SHAH
Director
Mobile No. 0091 – 9820292499
Email – marketing@rolexmetals.com

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