China Manufacture St52-3 Bulletproof Steel Plate Padding Inside

Ballistic steel plate technical paremeters

applications

Armored vehicle, bulletproof vest and helmet, armored equipments

chemical

C

Si

Mn

P

S

Cr

Nl

Mo

Ceq

compositions

≤0.32

≤1.8

≤1.1

≤0.015

≤0.008

≤1.5

≤1.8

≤0.5

≤0.70

(wt%)

Ceq-carbon equivalent, Ceq=C+Si/24+Mn/6+Ni/40+Cr/5+Mo/4+V/14

Mechanical Properties

Tensile strength(Rm, Mpa)

Yield strength (Rp0.2, Mpa)      ≥1400

Elongation (A,%) ≥8%

≥1650

Impact properties

AKV2 (-400C)≥20J (10mmx10mmx55mm test specimen)

*-Average of three specimens, transverse to rolling direction

Hardness range

480-530HB

Testing

Brinell hardness test

EN ISO 6506-1

Each heat treatment individual

Tensile test

EN 10002-1

Charpy impact test

EN 10045-1

t>10mm

Delivery condition

Quenched and tempered as EN10025-6

Ballistic performance

product

protection level

bullet Weight(g)

Muzzle velocity

test Range (m) 

Thickness:mm

weapon &Ammunition

bulletproof steel

ENB4 ,NIJIIIA 

 15.6 

 495±10

5

2.8

0.44 Magnum

ENB5,NIJIII

4

950±10

5

6.3

Rifle M16 A2 ,5.56×45 (ssl09)

BR/FB6 ,NIJLevel III

9.5

830±10

5

6.3

Rifle M16 A2, FN FAL, 7.62×51

NIJIII-

8

720±10

10

4.4

AK47 7.62×39,MSC bullet

BR/FB6 ,NIJLevel III

9.7

 838±10

10

6.3

M14,M80   7.62x51mm

NIJ III +

3.56

830±10

10

9

M16 A2 5.56×45 (M193)

Armor Type

Test Round

Test Ammunition

Nominal Bullet Mass

Minimum Required Bullet Velocity

No.of Shots

No.of Test

II-A

1

9mm

FMJ

8.0g

124gr

373m/s

(1225ft/s)

6

4

2

40S&W

FMJ

11.7g

180gr

325m/s

(1155ft/s)

6

4

II

1

9mm

FMJ

8.0g

124gr

398m/s

(1305ft/s)

6

4

2

357Magnum

JSP

10.2g

158gr

436m/s

(1430ft/s)

6

4

III-A

1

.357SIG

FMJFN

8.1g

125gr

448m/s

(1470ft/s)

6

4

2

44Magnum

SJHP

15.6g

240gr

436m/s

(1430ft/s)

6

4

III

1

7.62mm

NATO FMJ

9.6g

147gr

847m/s

(2780ft/s)

6

2

IV

1

.30Caliber

M2AP

10.8g

166gr

878m/s

(2880ft/s)

1

2