AMS 6421B

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#AMS # # #6421B

Description

AMS 6421B Carbon Steel and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Carbon Steel: AMS 6421B

Category	Type	Steel Grade
Steel Grades	Carbon Steel	AMS 6421B
		AMS 6412H
		AMS 6413G
		AMS 6414E
		AMS 6415L
		AMS MAM6415
		AMS 6444G
		AMS 6445E
		AMS 6417C
		AMS 6418F
		AMS 6419C

Chemical composition(mass fraction)(wt.%) of the AMS 6421B

C ≤	Si ≤	Mn ≤	P ≤	S ≤	Cr	Ni
0.35-0.4					0.8	0.85
Mo	Al	Cu	Nb	Te	V	Ce
0.2
N	Co	Pb	B	Other
			0.003	AISI/SAF 98B37 mod

Mechanical Properties of steel grade AMS 6421B

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)
934 (≥)	638 (≥)	43	23	21	Solution and Aging, Annealing, Ausaging, Q+T,etc	424

Physical Properties of steel grade AMS 6421B

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
22	-	-			0.34	-
677	528	-	44.3	412		-
914	-	21	11.2			141	424

Heat Treatment of steel grade AMS 6421B

Heat treated : 1181°C - 1713°C

Technological Curves of steel grade AMS 6421B

No Curve

Cross Reference Table (Equivalent Grade) of AMS 6421B

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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