B.S. BT4

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#B.S. # #BT4

Description

BS B.S. BT4 Stainless Steel and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Stainless Steel: B.S. BT4

Category	Type	Steel Grade	Standard
Steel Grades	Stainless Steel	B.S. BT4	BS
		B.S. BH 13
		B.S. BH 21
		B.S. BM 1
		B.S. BM 2
		B.S. BM 34
		B.S. BO 1
		B.S. Bo 2
		B.S. BT 1
		B.S. BT 15
		B.S. BT 5

Chemical composition(mass fraction)(wt.%) of the B.S. BT4

Element	Weight %
C	0.70-0.80
Mn	0.10-0.40
Si	0.20-0.40
Cr	3.75-4.50
Ni	0.3
Mo	0.40-1.00
W	17.50-19.00
V	0.80-1.20
Co	4.25-5.75
Cu	0.25
P	0.03
S	0.03

Mechanical Properties of steel grade B.S. BT4

Yield R_p0.2 (MPa)	Tensile R_m (MPa)	Impact KV/Ku (J)	Elongation A (%)	Reduction in cross section on fracture Z (%)	As-Heat-Treated Condition	Brinell hardness (HBW)
511 (≥)	396 (≥)	21	23	11	Solution and Aging, Annealing, Ausaging, Q+T,etc	214

Physical Properties of steel grade B.S. BT4

Temperature (°C)	Modulus of elasticity (GPa)	Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and	Thermal conductivity (W/m·°C)	Specific thermal capacity (J/kg·°C)	Specific electrical resistivity (Ω mm²/m)	Density (kg/dm³)	Poisson’s coefficient, ν
23	-	-			0.22	-
191	573	-	14.3	121		-
248	-	13	44.2			331	123

Heat Treatment of steel grade B.S. BT4

Heat treated : 1478°C - 1448°C

Technological Curves of steel grade B.S. BT4

No Curve

Cross Reference Table (Equivalent Grade) of B.S. BT4

Grade	Standard	Country	Application
Q195		China	Engineering and welding
Q215		China	Engineering and welding
Q215 B		China	Engineering and welding
Q235		China	Engineering and welding
Q235 B		China	Engineering and welding
Q235 C		China	Engineering and welding
Q235 D		China	Engineering and welding
Q255 A		China	Engineering and welding
Q255 B		China	Engineering and welding
Q275		China	Engineering and welding
Q235q C		China	Bridge structure with steel
Q235q D		China	Bridge structure with steel
Q345q E		China	Bridge structure with steel
Q345q C		China	Bridge structure with steel
ASTM 1030	ASTM	USA	General use carbon steel bar
UNS G10300	UNS	USA	General use carbon steel bar
ASTM 1005	ASTM	USA	General use carbon steel bar
UNS G10050	UNS	USA	General use carbon steel bar
ASTM 1006	ASTM	USA	General use carbon steel bar
UNS G10060	UNS	USA	General use carbon steel bar

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