Ramor 500 is SSAB’s flagship high‑hardness ballistic‑protection steel, delivered in quenched condition with no further heat‑treatment required. It serves as the main‑stream armour grade within the Ramor series, engineered to defeat kinetic bullet threats ranging from handguns up to rifle‑level impacts, complying with common standards including NIJ Level III and EN 1522 FB6.
Core Features
1. Primary ballistic‑protection grade for pistol, sub‑machine‑gun and rifle threats
2. Quenched ready‑to‑use delivery — no additional heat‑treatment needed
3. Excellent low‑temperature toughness: ≥ 20 J Charpy V‑Notch impact energy at ‑40°C
4. Wide thickness range 2.0‑30.0 mm for both thin‑sheet and heavy‑armour designs
Mechanical Properties (Typical Values)
|
Parameter |
Specification |
|
Available Thickness Range |
2.0 – 30.0 mm |
|
Brinell Hardness HBW |
490 – 560 |
|
Yield Strength Rp0.2 |
≈ 1250 MPa |
|
Tensile Strength Rm |
≈ 1600 MPa |
|
Elongation A5 |
≥ 8% |
|
Charpy V‑Notch Impact (10×10, transverse) |
≥ 20 J @ -40°C |
|
Delivery Condition |
Quenched |
|
Maximum Service Temperature |
≤ 180°C, ballistic performance not guaranteed above this limit |
Note: Slightly higher strength values may appear across different heats or test methods. Final acceptance is subject to EN 10204 3.1 / 3.2 Mill Test Certificate.
Physical Properties (Ramor‑Series Typical Values)
|
Parameter |
Typical Value |
|
Density |
7.67 – 7.86 kg/dm³ (≈7.85 kg/dm³) |
|
Modulus of Elasticity |
190 – 210 GPa |
|
Poisson’s Ratio |
0.27 – 0.30 |
Chemical Composition (Heat Analysis, Max. wt%)
|
Grade |
C |
Si |
Mn |
P |
S |
Cr |
Ni |
Mo |
B |
|
Ramor 500 |
≤0.35 |
≤0.70 |
≤1.50 |
≤0.015 |
≤0.010 |
≤1.00 |
≤2.00 |
≤0.70 |
≤0.005 |
Fine‑grained, aluminium‑killed steel. Elevated C‑Ni‑Mo‑Cr content delivers the higher hardness range 490‑560 HBW.
Size & Thickness Tolerance
Thin Sheet (2.0‑6.5 mm)
|
Thickness (mm) |
Thickness Tolerance (mm) |
|
2.00 – 4.00 |
0 / +0.36 |
|
4.01 – 5.00 |
0 / +0.40 |
|
5.01 – 6.00 |
0 / +0.42 |
|
6.01 – 6.50 |
0 / +0.44 |
Medium‑Heavy Plate (6.0‑30.0 mm)
|
Thickness (mm) |
Thickness Tolerance (mm) |
|
6.0 – 7.9 |
0 / +0.8 |
|
8.0 – 14.9 |
0 / +1.0 |
|
15.0 – 24.9 |
0 / +1.2 |
|
25.0 – 30.0 |
0 / +1.4 |
1. Length & width tolerance: Sheet to EN 10051, heavy plate to EN 10029 or SSAB agreed specification
2. Flatness: ≤ 6 mm / 1000 mm (surpasses EN 10029 Grade N Class L and EN 10051)
3. Surface quality: EN 10163‑2 Class B, Sub‑class 3
4. Hardness test: EN ISO 6506‑1, milled surface 0.3‑2.0 mm below plate surface
Ballistic Protection Minimum Thickness Reference
EN 1522 / PM2000 Standard
|
Protection Level |
Threat Ammunition |
Min. Ramor 500 Thickness (mm) |
|
FB2 |
9mm Luger FJ/CB/SC |
2 |
|
FB3 |
.357 Magnum |
2.3 |
|
FB4 |
.44 Magnum FJ/FN/SC |
2.5 |
|
FB4+ |
7.62×39 AK47 (M43) |
4 |
|
FB5 / FB6 |
5.56×45 SS109 / 7.62×51 NATO Ball |
6.5 |
|
FB7 |
7.62×51 NATO AP Armour‑Piercing |
14.5 |
NIJ 0108.01 Standard
|
Protection Level |
Threat Ammunition |
Min. Ramor 500 Thickness (mm) |
|
Level II |
9mm FMJ / .357 Mag JSP |
2.2 |
|
Level IIIA |
9mm FMJ / .44 Mag JHP |
2.5 |
|
Level III |
7.62×51 NATO Ball |
6 |
|
Level IV |
.30 M2 AP Armour‑Piercing |
14 |
Disclaimer: Values above are minimum reference thickness. Add safety margin for shot distance, impact angle and reliability requirements in final design.
Machining & Usage Guidelines
1. Heat‑treatment: Supplied quenched. No re‑heat‑treatment allowed. Ballistic performance invalid above 180°C.
2. Cold bending: Minimum inside bend radius = 8 × plate thickness. Avoid mechanical shearing for edge preparation.
3. Cutting: Laser, plasma and water‑jet cutting recommended. Water‑jet cutting preserves ballistic edge properties. Shearing requires heavy‑duty equipment with hard blades.
4. Welding: Multiple welding methods applicable. Austenitic filler metals are preferred. Pre‑heating study is required if ferritic consumables are used for high‑strength joints.
5. Machining: Use carbide‑tipped tools, rigid fixturing, sufficient lubrication and anti‑vibration setup.
6. Work‑site safety: Cutting and grinding generate fine steel dust; adequate respiratory protection is mandatory.
7. Documentation: EN 10204 3.1 / 3.2 MTC and ballistic test reports are available on request.
Typical Applications
1. Armoured‑vehicle body panels, A/B/C pillars, firewalls and roof structures
2. Cash‑in‑transit security trucks
3. Bank counters, vault reinforcement and currency‑exchange booths
4. Security cabins, mobile protective shelters
5. Shooting‑range bullet‑stop barriers
6. Marine‑vessel ballistic‑protection structures
Ramor‑Series Grade Selection & Weight‑Saving Reference
|
Grade |
Thickness (mm) |
Hardness HBW |
Product Positioning |
|
Ramor 300 |
3.0‑6.0 |
260‑320 |
Low‑hardness steel for low‑threat civilian‑protection |
|
Ramor 400 |
2.0‑30.0 |
360‑460 |
Medium‑hardness, blast + ballistic balance, best fabricability |
|
Ramor 450 |
8.0‑16.0 |
400‑480 |
Medium‑hardness armour, excellent‑40℃ low‑temperature toughness |
|
Ramor 500 |
2.0‑30.0 |
490‑560 |
Main‑stream high‑hardness ballistic steel, covers pistol‑to‑rifle threats |
|
Ramor 550 |
3.0‑15.0 |
540‑600 |
Ultra‑high‑hardness, weight‑reduction upgrade (‑10~20 % weight vs Ramor 500) |
|
Ramor 600 |
3.0‑6.0 |
Nominal 600 |
Ultra‑high‑hardness thin ballistic plate |
Weight‑saving note: Upgrading from Ramor 500 to Ramor 550 can cut cabin armour weight by 10‑20 %, improving vehicle payload, off‑road performance and fuel economy.
Request full Ramor 500 datasheet, ballistic‑test documentation and custom cutting service for your armour‑vehicle or security‑facility project.
Disclaimer: All technical data sourced from official SSAB documentation, for reference only. Final product acceptance shall be governed by the mill‑issued MTC certificate.
