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BP Series Hot rolled Protection Steel

BP series steel is hot rolled protection steel. This kind of steel can be used for applications where high ballistic performance is required, such as armored cars, armored personnel carriers, escort vehicles, VIP cars, security doors, bank counter shield, strongbox, shields, helmet, etc.
B: means Baosteel, P:Protection,500:Brinell hardness

BP Series Protection Steel Chemical Composition(%, by weight)

Steel grade	C≤	Si≤	Mn≤	P≤	S≤	Alt≥	Cr≤	Ni≤	B≤	CEV Typical value
BP300	0.22	0.5	2	0.02	0.015	0.015	0.5	0.5	0.005	0.6
BP370	0.32	0.5	1.5	0.02	0.015	0.015	1	0.5	0.005	0.52
BP440	0.35	1	1.85	0.02	0.015	0.015	1	0.5	0.005	0.55
BP500	0.5	0.5	1.7	0.02	0.015	0.015	1.2	0.8	0.005	0.62
BP600	0.5	1	1.85	0.02	0.015	0.015	1.2	0.8	0.005	0.67

CEV = C + Mn/6 + Cr/5 + Mo/5 + B/5 + Cu/15 + Ni/15
Note : Nb,V and Ti may be added if necessary （Nb +V + Ti ≤0.22% ）

BP Series Protection Steel Mechanical Properties

Steel grade	Thickness	Tensile test			90° bending	Impact energy
-	mm	Yield strength ReH,MPa	Tensile strength Rm,MPa	Elongation A5,%	Bending diameter	-20℃ KV2,J
BP300	2-12	≥700	≥900	≥10	d=3a	≥20
BP370	2-12	≥900	≥1050	≥10	－	≥20
BP440	2-12	≥1100	≥1250	≥8	－	≥20
BP500	2-12	≥1250	≥1450	≥8	－	≥20
BP600	2-12	≥1450	≥1750	≥6	－	≥20

Note:
1. Transversal specimen is adopted in the tensile test and longitudinal specimen in the impact test;
2. Transversal specimen is used in the bending test. bending diameter, a=plate thickness

BP Series Steel Specification

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BP Series Hot rolled Protection Steel

BP Series Protection Steel Chemical Composition(%, by weight)

BP Series Protection Steel Mechanical Properties

Steel grade

Thickness

Tensile test

90° bending

Impact energy

-

mm

Yield strength ReH,MPa

Tensile strength Rm,MPa

Elongation A5,%

Bending diameter

-20℃ KV2,J

BP300

2-12

≥700

≥900

≥10

d=3a

≥20

BP370

2-12

≥900

≥1050

≥10

－

≥20

BP440

2-12

≥1100

≥1250

≥8

－

≥20

BP500

2-12

≥1250

≥1450

≥8

－

≥20

BP600

2-12

≥1450

≥1750

≥6

－

≥20