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

Ramor® 550

Thickness
(mmin)
3.0 - 15.00.118 - 0.590
Hardness
(HBW)
540 - 600

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)

C
(max %)
C
(max %)
0.36
Si
(max %)
0.70
Mn
(max %)
1.5
P
(max %)
0.015
S
(max %)
0.010
Cr
(max %)
1.50
Ni
(max %)
2.50
Mo
(max %)
0.80
B
(max %)
0.005

The steel is grain refined. Phosphorous and sulphur are not intentionally alloying elements.

Tolerances

More details are given on www.ssab.com.

Thickness

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

Length and Width

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 10029 Class N (steel type L) and EN 10051.

Product Type
Product Type
Sheet
1000 ruler
(mmin)
60.236
Product Type
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.