T370HBW hardening high toughness low alloy steel ballistic steel plate
Description
Rolled homogeneous armor for vehicles.
T370HBW Class 1 ballistic steel is a rolled homogeneous armor plate (RHA) that combines good resistance to penetration with excellent toughness.
Benefits of T370HBW Class 1 ballistic steel include:
• Market-leading steel protection
• Superior workshop properties
• Optimized solutions
• Expertise in ballistic protection from VANFORGE
T370HBW Class 1 ballistic steel is not intended for further heat treatment.
Dimension range
T370HBW Class 1 ballistic steel is available in thicknesses between 3.0 and 100.0 mm. Other dimensions to be agreed with VANFORGE.
Mechanical Properties
| 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 %) |
| 3.0- 3.9 | 380- 430 | 20 J/-40°C | 1000 | 1150- 1350 | 8 | 8 |
| 4.0- 5.9 | 380- 430 | 20 J/-40°C | 1000 | 1150- 1350 | 10 | 10 |
| 6.0- 19.9 | 380- 430 | 20 J/-40°C | 1000 | 1150- 1350 | 10 | 12 |
| 20.0- 39.9 | 340- 390 | 40 J/-40°C | 900 | 1050- 1250 | 11 | 13 |
| 40.0- 59.9 | 300- 350 | 40 J/-40°C | 850 | 950- 1150 | 12 | 14 |
| 60.0- 100.0 | 300- 350 | 40 J/-40°C | - | - | - | - |
(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 thickness from 6 mm.
Tensile test according to EN ISO 6892 on each heat and thickness under 60 mm.
Ultrasonic testing
According to EN ISO 10160 Class E3 S3 for thicknesses up to 80 mm and E1 S2 for > 80 mm.
Chemical Composition (ladle analysis), %, max
| C | Si | Mn | P | S | Cr | Ni | Mo | B |
| 0.32 | 0.40 | 1.2 | 0.010 | 0.003 | 1.0 | 1.8 | 0.7 | 0.005 |
The steel is grain-refined.
Intentional alloying elements.
Thickness
| Heavy Plate |
| Plate thickness (mm) | Tolerances (mm) |
| 3.0 - 12.9 | - 0.0 / + 0.8 |
| 13.0 – 19.9 | - 0.0 / + 1.0 |
| 20.0 - 39.9 | - 0.0 / + 1.2 |
| 40.0 - 59.9 | - 0.0 / + 1.6 |
| 60.0 - 79.9 | - 0.0 / + 2.0 |
| 80.0 - 100 | - 0.0 / + 2.4 |
Length and Width
According to VANFORGE´s dimension program.
• Tolerances conform to EN 10029.
• Dimensional tolerances for plate with mill edge according to special agreement.
Shape
Tolerances according to EN 10029.
Flatness
Tolerances according to EN 10029 Class N (steel type L).
Surface Properties
According to EN 10163-2 Class B Subclass 3.
Fabrication and Other Recommendations
Welding, bending and machining
T370T Class 1 ballistic steel is not intended for further heat treatment. If T370HBW Class 1 steel is heated above 390 °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 390 °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
