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HARDNESS SURVi-'/S OF PtN ET RATIONS IN HOMO-

ni tMinniirrn ai nnvi iinmi ni i vi.r ^r)(

THIS REPORT AVAILABLE IM MICROFICHE ONLY

I ;•«.«-« l-'i

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REPORT P'O ) f A i .LUI. n A rp H n T Q O t p t f r^v;’ r\ % / '■> / > I A lb ill b i n i 1 •• U I bl/ m4

DISTRIBUTION OF REPORTS

Ä Ó ... TITLE..

AuPhor

Lnb- File

Main Ofi’lce File

ChifiT of Ordnance

Technical Staff

S p r .1 n gf i e 1 d A rm o ry

T;ntervl let Arsenal

Rock Island Arsenal

F rank f o rd A r s s nal

Picatinny Arsenal

Aberdeen Proving Ground

Chief, Bureau Ordnance

Naval Gun Factory

Chief, Bureau C & R

Local Circulation

Available for special circulation-

0 ther e gtabl1shnen t s requesting work,,

Private Parties paying for work

Lo¬ cal.

1 ^

1 ,/

1

Other C rd .

iVork

1

1

<_> f, 01

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t,l f.i

_Aj:rr;y_

1

1

1

Hr

1

1

1

1

1

1

1

3

Pri. y a te

].

1

1

1

1

1

1

1

1

1

1

1

welding and a a directed

1 as directed

1

i '

>

f

Hardness Surveys of Penetrations In Homo-

geneous Armor Plate of High, Medium, and Poor

Ballistic) Properties.

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T!

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Round

Round

Round

Round

Round

Round

PLATE MO. 614 -• 5-

DiaSTOM “ Homogeneoua Armor Plat#.

Id X 18 X {". Actual Thlcknenna " .^Oo11.

Brlnoll - 430-41-14,

C Mn fii 1 £ ill flîl ËA .¾

51 .42 .14 .013 -016 .09 1.21 .56 .¾

Aranunition - .)0 o&l. 1Ö5 P"- M1922. A.P.

Ranga - 100 yard».

Spoolfloatlon - AXfl - 5^*

1. -ill. Val. 2696 f/ö. Compltt® Pont trat Ion. J ■ ' f

Dlaiû. of Hole In Hack ~ .70'1.

2. sir. 1©X. 2656 f/a. Complete Penitratlon. C.I.P.

4-. str. f«l. 2459 f/e. Partial Penetration.

Dlatn. of Kola In Back - .005".

5. str. Völ. 2495 f/ö* Partial Penetration.

Mao. of Hols In Back - «Ol”.

9. str. Vel. 2409 f/e. Partial Penetration.

Height of Bulge on Baok - .0511.

10. utr. Vel. 244-6 f/e. Partial Penetration.

Height of Bulge on Back - .OS".

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PLATE NO. EX ?£.

I

DIS3TON - Homogenooua Armor Plate.

1Ö X 1Ö X Actual thlcknesB - .SOP"

Brlnell - 402-410.

£ m 8k ä l Ql M Ï&

.3s .69 .17 .65 .30

Ammunition - .30 cal. 165 gr. M1922 A.P.

Rang® - 100 |&rds.

apoclflcfttlona - • AX0.- 5^»

Round 1. atr. Vel. 2672 f/p. Complete Penetration. C.I.P.

Round 4. Btr. Vol. 2704 f/s. Complete Penetration.

Diam. of Hoi® In Back. - .41".

Round 5. Str. Vel. PÓ96 f/a. Complete Penetration. C.I.P.

Round 6. Str. Vel. f/a. Complete Penetration.

Dlais. of Hole in Back ~ .01".

Height of Bulge on Back -• .06".

Round 7- Str. Vol. 2206 f/a. Partial Penetration.

Height of Bulge on Back - .03“.

Round 0. Btr. Vol. ?371 f/a. Partial Penetration.

Height of Bulge on Back - .0511.

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Round,

Round

Hound

PLATE HO. 23.

DÏ8ST0H - Konog«n«auo Amor Plat©.

lí? X 12 X 1". Actual thloknees - 1.0l65M.

Brin® 11 - 4HS.

£ Hi SI È £ SL M2 lã .50 .?0 .25 .020 .023 1.12 .65 .23

Ammunition ~ .50 oal. 750 gr. M~l. a.P.

Han®'« - 100 yard®.

Spaoifloatlon - 3I.

1. Str. V«l. 2499 f/i. Partial Penetration.

Height of Bulge on Back ~ .0111

Depth of Penetration - .77".

2. Str. Vol. 256S t/a. Partial Penetration.

Height of Bulge on Back - „CilS”.

Depth of Penetration - .98”-

3. Str. Vel. 2!54o f/o. Partial Penetration.

Height of Bulge on Back » . öS,e .

Depth of Penetration - .9611.

Í

F ñC€

I PLATE WO. 2.

TAYLOR - WHARTON - Homog®nooua Armor Plato

12 )t 12 X I" Actual thlokneoa - .491 •* .493"

Brine11 - 255

ç 8a ëL S £

1.17 11.4o .405 *010 .057

Hadfield Mangan®»® Stool, chromium plated on front mid®.

Ammunition ~ .30 oa!> I65 ®r. M1922. A.P.

Range - 150 foot.

fiouind C. Str. V®1. 2215 î/ô* Complote Penetration.

C.I.P. i|

Round D. Str. Val. 2357 í/a- Completo Penetration.

Height of Bulge on Back - .14" I

Dlara. of Hole In Back - .25" ,'iï

Round E. Str. Val. 22S3 f/e. Complot® Penetration. {

Height of Bulge on Back -• .17"

Dlam. of Hoi® in Back - .25" jg

Partial Penetration - Str. V©1. 1800 f/o.

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CABBON STEEL PLATE.

Hoinogoneous Carbón Stool Plato.

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PLATE NO. TO

JEÛSQP - Homogsneouo Armor Plat®.

12 X 12 X I". Actual thlcknooa - .^96"

Brlnoll - 555•

C Mn 91 8 P Ml Cr

.425 «66 2.01 .010 .024 3.5a 0.24

Ammunition - .30 oal. 165 gr. M1922. a.P.

Bango ~ 100 yards.

Specification ~ 31«

Round 3. str. Vol. 2599 F./S. Partial Panotratlon.

Height of Bulge on Back - .01".

Round. 4. str. V®1. 2602 F /8. Partial Penetration.

Haight of Bulge on Back - .01M.

Bound 9. 8tr. V®1. 29^5 P /9- Partial Penetration.

Height of Bulge on Back - .01".

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Carburetor Cover

WATERTOWN ARSENAL Caflting.

2l| » 15 % I"

Brin®11 - 4lfl.

■c- a S £ £r & a

Î?—-018 -010 i-jj .«? .si

Araraunltlon - .30 o„l. l65 gr. M19;>2 A.p.

Range » 10Q yards.

Spoolfication - AX3 - 54. Rev. ?.

16 ’ Str- ParUal pen0tl.atl0n.

Height of Bulge on Back - ,02w.

Depth of Penetration - .46».

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