UNI 34 CrMo 4 KB

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#UNI # #34

Description

UNI 34 CrMo 4 KB Alloy Steel and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Alloy Steel: UNI 34 CrMo 4 KB

Category	Type	Steel Grade
Steel Grades	Alloy Steel	UNI 34 CrMo 4 KB
		AISI 8617H
		AISI 8617
		AISI 8620
		AISI 8620H
		UNI 20 NiCrMo 2
		UNI 20 NiCrMo
		UNI 25 CrMo 4
		UNI 25 CrMo 4 KB
		UNI 30 NiCrMo 2 KB
		UNI 34 Cr 4 KB

Chemical composition(mass fraction)(wt.%) of the UNI 34 CrMo 4 KB

Element	Weight %
C	0.33-0.38
Mn	0.70-0.90
P	0.035 (max)
S	0.04 (max)
Si	0.15-0.30
Cr	0.30-1.10
Mo	0.15-0.25

Mechanical Properties of steel grade UNI 34 CrMo 4 KB

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)
725 (≥)	844 (≥)	33	31	44	Solution and Aging, Annealing, Ausaging, Q+T,etc	431

Physical Properties of steel grade UNI 34 CrMo 4 KB

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
43	-	-			0.12	-
795	618	-	11.3	132		-
427	-	42	23.2			423	221

Heat Treatment of steel grade UNI 34 CrMo 4 KB

Heat treated : 1373°C - 1725°C

Technological Curves of steel grade UNI 34 CrMo 4 KB

No Curve

Cross Reference Table (Equivalent Grade) of UNI 34 CrMo 4 KB

Grade	Standard	Country	Application
UnitempAF2-1		USA	Martensitic special steel
UnitempHS	AISI	USA	Martensitic special steel
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

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