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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-V. Minimum required ballistic limits (protection criteria) for class 1 and 3 armor and the

upper ballistic limits for class 3 armor; firing obliquity: 45�, projectile: caliber 90 mm M82 APC.

BL(P), ft/sec

Thickness,

CLASS

inches

1&3

Min

Max

2.690

2089

2382

2.980

2260

2553

3.280

2425

2718

2.700

2095

2388

2.990

2265

2558

3.290

2430

2723

2.710

2101

2394

3.000

2271

2564

3.300

2436

2729

2.720

2107

2400

3.010

2277

2570

3.310

2441

2734

2.730

2113

2406

3.020

2282

2575

3.320

2446

2739

2.740

2119

2412

3.030

2288

2581

3.330

2451

2744

2.750

2125

2418

3.040

2294

2587

3.340

2457

2750

2.751 1/

2126

2419

3.050

2299

2592

3.350

2462

2755

2.760

2131

2424

3.060

2305

2598

3.360

2467

2760

2.770

2137

2430

3.070

2310

2603

3.370

2472

2765

2.780

2143

2436

3.080

2316

2609

3.380

2478

2771

2.790

2149

2442

3.090

2322

2615

3.390

2483

2776

2.800

2155

2448

3.100

2327

2620

3.400

2488

2781

2.810

2161

2454

3.110

2333

2626

3.410

2493

2786

2.820

2167

2460

3.120

2338

2631

3.420

2498

2791

2.830

2173

2466

3.130

2344

2637

3.430

2504

2797

2.840

2179

2472

3.140

2349

2642

3.440

2509

2802

2.850

2185

2478

3.150

2355

2648

3.450

2514

2807

2.860

2190

2483

3.160

2360

2653

3.460

2519

2812

2.870

2196

2489

3.170

2366

2659

3.470

2524

2817

2.880

2202

2495

3.180

2371

2664

3.480

2529

2822

2.890

2208

2501

3.190

2376

2669

3.490

2534

2827

3.500 2/

2.900

2214

2507

3.200

2382

2675

2540

2833

2.910

2220

2513

3.210

2387

2680

3.510

2545

2838

2.920

2225

2518

3.220

2393

2686

3.520

2550

2843

2.930

2231

2524

3.230

2398

2691

3.530

2555

2848

2.940

2237

2530

3.240

2404

2697

3.540

2560

2853

2.950

2243

2536

3.250

2409

2702

3.550

2565

2858

2.960

2248

2541

3.260

2414

2707

3.560

2570

2863

2.970

2254

2547

3.270

2420

2713

3.570

2575

2868

Specification requirements begin for this ordered thickness.

Specification requirements end 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.