Mars® 650 – Data

Mars®650: Ultra-High-Hardness Armor with maximum resistance to penetration

Mars® 650 is a ultra-high-hard (typical 650 HBW) protection steel offering uncompromising ballistic resistance performance, for use as add-on armor when weight reduction is essential.


Mars® 650 satisfies requirements from specifications:
• France : NF A36-800 THD5
• USA : MIL-DTL-32332

Chemical composition – Ladle analysis – Max weight%

C S P Si Mn Ni Cr Mo B
.55 ≤ .002 ≤ .010 ≤ 1.00 ≤.7 2.4 ≤ .4 ≤ .5 ≤.003

Mechanical properties (in both directions)

Hardness Charpy V 2) @ -40° C
standard 10×10 specimen 3)
HB J ft.lbs
Guarantees ≥577 ≥ 8 ≥ 6
Typical values 650 9 7

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 relevant standard (EN ISO 6506-1 / 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 relevant standard (EN ISO 148-1 / ASTM E23) on each heat and thickness from 6mm.
Ultrasonic test is performed according to standard requirements or upon special agreement up to EN 10160 Class S3/E4.

For more technical details :


Mars® 650 – 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.