T440HBW hardened high toughness penetration and shock resistance ballistic plate for blast protection
Description
Blast protection plate.
T440HBW ballistic steel combines excellent penetration and shock resistance.
It offers vehicle designers new ways to increase protection using lighter weight designs.
Benefits of using T440HBW ballistic steel include:
• Superior workshop properties
• Optimized solutions
• Perfect hardness/toughness balance, for combined penetration and blast protection
• Expertise in ballistic protection from VANFORGE
T440HBW ballistic steel is not intended for further heat treatment.
Dimension range
T440HBW ballistic steel is available in thicknesses between 4.0 and 80.0 mm.
Mechanical Properties
| Plate thickness (mm) | Hardness (HBW) | Charpy-V (1), 10x10 mm test Specimen (2) Min | Yield Strength Rp0.2 (min MPa) | Tensile Strength Rm (MPa) | Elongation A5 (min %) | Elongation A50 (min %) |
| 4.0 - 30.0 | 420 - 480 | 45 J/ - 40°C | 1100 | 1250- 1550 | 10 | 12 |
| 30.1 - 50.0 | 420 - 480 | 45 J/ - 40°C | 1050 | 1250- 1550 | 10 | 12 |
| 50.1 - 80.0 | 420 - 480 | 45 J/ - 40°C | 1000 | 1250- 1550 | 10 | 12 |
(1) Average of three tests. Transverse to rolling direction. Single value min. 70 % of specified average.
(2) For plate thicknesses under 12 mm sub-size Charpy-V specimen are used. The specified minimum value is then proportional to the specimen cross-section.
Mechanical Testing
Brinell hardness test according to EN ISO 6506-1 on each heat treatment individual.
Charpy impact test according to EN ISO 148 on each heat and thicknesses from 6 mm.
Tensile test according to EN ISO 6892 on each heat and thicknesses.
Ultrasonic testing
According to EN ISO 10 160 Class E3S3.
Chemical Composition (ladle analysis), %, max
| C | Si | Mn | P | S | Cr | Ni | Mo | B |
| 0.21 | 0.50 | 1.2 | 0.010 | 0.003 | 1.0 | 2.5 | 0.7 | 0.005 |
The steel is grain-refined.
Intentional alloying elements.
Thickness
| Thickness (mm) | Tolerances (mm) |
| 4.0 - 12.9 | - 0.0 / + 0.6 |
| 13.0 - 20.0 | - 0.0 / + 0.8 |
| 20.1 - 40.0 | - 0.0 / + 1.0 |
| 40.1 - 59.9 | - 0.0 / + 1.4 |
| 60.0 - 80.0 | - 0.0 / + 1.6 |
Length and Width
According to VANFORGE´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.
Flatness
Tolerances according to VANFORGE´s flatness tolerances which are more restrictive than EN 10029 Class N (steel type L).
Surface Properties
According to EN 10163-2 Class B Subclass 3.
Delivery Conditions
The delivery condition is QT (Quenched and Tempered).
Fabrication and Other Recommendations
Welding, bending and machining
T440HBW ballistic steel is not intended for further heat treatment. If T440HBW steel is heated above 170 °C after delivery from VANFORGE no guarantees for the properties of the steel are given.
Nitriding or surface coating may be carried out if the temperature is below 170 °C.
Appropriate health and safety precautions must be taken when welding, cutting, grinding or otherwise working on the product. Grinding, especially of primer coated plates, may produce dust with high particle concentration.
Production process
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T440HBW Ballistic Quenched And Tempered Steel Plate Penetration / Shock Resistance Images
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