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Mars®280 is a less hardness (typical 280 HBW), high toughness protection steel offering maximum resistance to shock and blast waves for all vehicle structures (main battle tanks, armoured personal carriers …).
Mars® 280 satisfies requirements of following specifications:
• USA : MIL-DTL-12560 CL 2
|≤ .30||≤ .002||≤ .012||≤ .4||< 1.20||≤ 1.8||≤ 1.5||≤ .6||≤ .10||≤.003|
|Hardness range|| Charpy KCV2) @-40°C
Standard 10×10 specimen 3)
|Guarantee||260 – 310||≥ 43||≥ 32|
2) Average of 3 tests. Single value min 70% of specified average.
3) For nominal thicknesses under 11mm, sub-size specimens are used. The specified minimum value is then proportional to the specimen cross section.
Brinell hardness test according to ASTM E10/E110, on each plate and in two places, one at each end of a diagonal, on a milled surface 0,5 to 1mm below plate surface.
Charpy Impact test according to ASTM E23 on each heat and thickness from 6mm.
Ultrasonic test is performed according to MIL-DTL-12560 or upon special agreement up to testing levels EN 10160 Class S3/E4