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MIL-DTL-12560 Armor Plate, Steel, Wrought, Homogeneous \(For Use In Combat-Vehicles And For Ammunition Testing\)This specification covers wrought-steel homogeneous armor plate for ordered thicknesses from 0.098 inch \(2.5 mm\) up to an ordered thickness of 6.000 inches \(152.4 mm\), inclusive, for use in combat-vehicles and for ordered thicknesses from 0.250 inches \(6.35 mm\) up to an ordered thickness of 12.000 inches \(304.8 mm\), inclusive, for use in proof and acceptance testing of armor defeating ammunition \(see 6.1, 6.2, and 6.3.3\).

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MIL-DTL-12560K (MR)

APPENDIX A

TABLE A-VII. Minimum required ballistic limits (protection criteria) for class 1 and 3 armor and

the upper ballistic limits for class 3 armor; firing obliquity: 0�, projectile: 90 mm M318A1 AP.

BL(P), ft/sec

Thickness,

CLASS

inches

1&3

Min

Max

3.940

1583

1785

4.260

1697

1899

4.580

1805

2007

3.950

1586

1788

4.270

1701

1903

4.590

1808

2010

3.960

1590

1792

4.280

1704

1906

4.600

1811

2013

3.970

1594

1796

4.290

1708

1910

4.610

1815

2017

3.980

1597

1799

4.300

1711

1913

4.620

1818

2020

3.990

1601

1803

4.310

1714

1916

4.630

1821

2023

4.000 1/

1605

1807

4.320

1718

1920

4.640

1824

2026

4.010

1608

1810

4.330

1721

1923

4.650

1827

2029

4.020

1612

1814

4.340

1725

1927

4.660

1831

2033

4.030

1616

1818

4.350

1728

1930

4.670

1834

2036

4.040

1619

1821

4.360

1731

1933

4.680

1837

2039

4.050

1623

1825

4.370

1735

1937

4.690

1840

2042

4.060

1627

1829

4.380

1738

1940

4.700

1844

2046

4.070

1630

1832

4.390

1742

1944

4.710

1847

2049

4.080

1634

1836

4.400

1745

1947

4.720

1850

2052

4.090

1637

1839

4.410

1748

1950

4.730

1853

2055

4.100

1641

1843

4.420

1752

1954

4.740

1856

2058

4.110

1644

1846

4.430

1755

1957

4.750

1860

2062

4.120

1648

1850

4.440

1758

1960

4.760

1863

2065

4.130

1652

1854

4.450

1762

1964

4.770

1866

2068

4.140

1655

1857

4.460

1765

1967

4.780

1869

2071

4.150

1659

1861

4.470

1768

1970

4.790

1872

2074

4.160

1662

1864

4.480

1772

1974

4.800

1875

2077

4.170

1666

1868

4.490

1775

1977

4.810

1878

2080

4.180

1669

1871

4.500

1778

1980

4.820

1882

2084

4.190

1673

1875

4.510

1782

1984

4.830

1885

2087

4.200

1676

1878

4.520

1785

1987

4.840

1888

2090

4.210

1680

1882

4.530

1788

1990

4.850

1891

2093

4.220

1683

1885

4.540

1792

1994

4.860

1894

2096

4.230

1687

1889

4.550

1795

1997

4.870

1897

2099

4.240

1690

1892

4.560

1798

2000

4.880

1900

2102

4.250

1694

1896

4.570

1801

2003

4.890

1903

2105

Specification requirements begin for this ordered thickness.

Note: Tabulated values on either side of the specification requirements are for interpolation

of BL(P) requirements on undersize or oversize plates.