Mars® 280 – Data

Mars® 280: Rolled Homogeneous Armor heat treated for maximum resistance to shock.

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

Chemical composition -Ladle analysis – Max weight %

C S P Si Mn Ni Cr Mo V B
≤ .30 ≤ .002 ≤ .012 ≤ .4 < 1.20 ≤ 1.8 ≤ 1.5 ≤ .6 ≤ .10 ≤.003

Mechanical properties ( In both directions )

Hardness range  Charpy KCV2) @-40°C
Standard 10×10 specimen 3)
HBW J ft.lbs
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



Mars® 280 – Data

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Technical data and information are to the best of our knowledge at the time of publication. However, they may be subjected to some slight variations due to our ongoing research programmes. Therefore, we suggest that information be verified at time of enquiry or order. Furthermore, in service, real conditions are specific for each application. The data presented here are for the purpose of description only, and can be considered as guarantees only when written formal approval has been provided by our company. Industeel reserves the right to change its product range at any time without prior notice.