Metals & alloys · Ferrous alloys
MIL-DTL-12560 rolled homogeneous armour steel
Quenched-and-tempered wrought homogeneous armour plate for combat vehicles and ballistic test applications, with class and thickness-specific qualification requirements.
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01
Overview
- Material class
- Metals & alloys
- Category
- Ferrous alloys
- Family
- Rolled Homogeneous Armour Steel
- Product forms
- Not specified
Composition
| Constituent | Min | Max | Typical | Note |
|---|---|---|---|---|
| C | 0.35 | declared chemistry | ||
| Mn | 1.5 | declared chemistry | ||
| Ni | 3.5 | optional/declared | ||
| Cr | 2.5 | optional/declared | ||
| Mo | 0.7 | optional/declared | ||
| Fe | Balance |
02
Properties and conditions
Engineering properties
| Property | Value | Unit | Condition |
|---|---|---|---|
| Density | 7.85 | g/cm³ | Representative; verify product form and condition |
| Hardness | class/thickness dependent | HB | Representative; verify product form and condition |
| Ballistic performance | acceptance tested | specification dependent | |
| Charpy toughness | specified | class dependent | |
| Thickness range | 2.5–304.8 | mm | class dependent |
| Weldability | controlled | chemistry and class dependent |
Conditions
Representative supplied condition
Condition not fully specified in the source record.
03
Processing and use
Processing
- Product form, thermal history and manufacturing route materially affect performance.
Applications
- Combat-vehicle armour
- Ballistic test plates
- Protected structures
Selection considerations
- Use the current governing standard and supplier certification for design or procurement.
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04
Standards and related materials
Standards and designations
| System | Designation | Note |
|---|---|---|
| MIL-DTL | 12560K w/ amendments | verify current ASSIST revision |
05
Sources and context
Sources
- U.S. Department of Energy lightweight materials programApplication reference
Confirm the applicable specification, product form and condition before using values for design or procurement.
Supply and sustainability
Availability and lead time depend on grade, product form, certification and regional supply chain.
Segregated recovery and closed-loop recycling improve material efficiency where practical.