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Ramor® 550

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General Product Description

The ballistic protection steel with extra-high hardness.

Ramor® 550 is a ballistic protection steel of extra-high hardness, available in thicknesses of 3.0 ‑ 15.0 mm (0.118‑0.591″) and hardnesses of 540‑600 HBW.

Ramor® 550 is available as cut-to-length sheet in thicknesses of 3.0 ‑ 6.0 mm (0.118‑0.236″) and as plate in thicknesses of 6.0 ‑ 15.0 mm (0.236‑0.591″). Delivered in quenched condition, Ramor® 550 is not intended for further heat treatment.

Mechanical Properties

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  • Hardness
    (HBW)
Thickness
(mmin)		 Hardness
(HBW)
Ramor® 550 3.0 - 15.00.118 - 0.590 540 - 600
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    Mechanical Testing

    Brinell hardness test according to EN ISO 6506-1 on each heat treatment individual/coil.

    Hardness is measured on a milled surface 0.3-2 mm below plate surface.

    Chemical Composition (ladle analysis)

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    • C
      (max %)
    • Si
      (max %)
    • Mn
      (max %)
    • P
      (max %)
    • S
      (max %)
    • Cr
      (max %)
    • Ni
      (max %)
    • Mo
      (max %)
    • B
      (max %)
    C
    (max %)    		 Si
    (max %)    		 Mn
    (max %)    		 P
    (max %)    		 S
    (max %)    		 Cr
    (max %)    		 Ni
    (max %)    		 Mo
    (max %)    		 B
    (max %)
    0.36 0.70 1.5 0.015 0.010 1.50 2.50 0.80 0.005
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      The steel is grain refined. Phosphorous and sulphur are not intentionally alloying elements.

      Tolerances

      More details are given on www.ssab.com.

      Thickness

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      • Product Type
      • Thickness
        (mmin)
      • Tolerance
        (mmin)
      Product Type Thickness
      (mmin)      		 Tolerance
      (mmin)
      Sheet 3.00 - 4.000.118 - 0.157 - 0.0 / + 0.36- 0.0 / + 0.0142
      Sheet 4.01 - 5.000.158 - 0.197 - 0.0 / + 0.40- 0.0 / + 0.0157
      Sheet 5.01 - 6.000.197 - 0.236 - 0.0 / + 0.42- 0.0 / + 0.0165
      Plate 6.0 - 7.90.236 - 0.311 - 0.0 / + 0.8- 0.0 / + 0.0315
      Plate 8.0 - 15.00.315 - 0.590 - 0.0 / + 1.0- 0.0 / + 0.0394
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        Length and Width

        Sheets are delivered with mill edges cut as standard.

        • Tolerances conform to EN 10 051 or to SSAB´s standard after agreement.

        Plate delivered according to SSAB’s dimension program.

        • Tolerances conform to EN 10 029 or to SSAB’s standard after agreement.
        • Dimensional tolerances for plate with mill edge according to special agreement. 

        Shape

        Tolerances according to EN 10029 for plate and according to EN 10051 for sheet.

        Flatness

        Tolerances according to SSAB’s flatness tolerances which are more restrictive than EN 10 029 Class N (steel type L) and EN 10 051.

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        • Product Type
        • 1000 ruler
          (mmin)
        Product Type 1000 ruler
        (mmin)
        Sheet 60.236
        Plate 60.236
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          Product Type
          Sheet
          1000 ruler
          (mmin)
          60.236
          Product Type
          Plate
          1000 ruler
          (mmin)
          60.236

          Surface Properties

          According to EN 10163-2 Class B, Subclass 3.

          Delivery Conditions

          Ramor is delivered in quenched condition.