Metallurgical specifications of Rods, Tubes and Wires of Steel 6305

General Characteristics
6305 VAC-ARC alloy steel is a modified 4140 steel with higher molybdenum and a vanadium addition. The alloy steel is generally used in the 160/180,000 psi tensile strength range obtained with an 1100°F temper where good toughness is critical, such as jet engine shafts. It is produced by the consumable electrode vacuum arc remelting process to provide optimum cleanliness and preferred ingot structure.
Typical Chemical Composition

Weight % C Mn Si Cr Mo V Fe

Typical

Analysis
0.44 0.55 0.25 0.95 0.50 0.28 Reminder

Weight %	C	Mn	Si	Cr	Mo	V	Fe
Typical Analysis	0.44	0.55	0.25	0.95	0.50	0.28	Reminder

Characteristics		English	Metric
Nominal density (68°F/20°C)		0.283 lbs/in³	7.84 g/cm³
Specific heat (212 °F/100°C)		0.11 BTU/lb – °F	460 J/KG- °K
Coefficient of thermal expansion	0°F – 200°F -18°C – 93°C	6.30 micro in/in- °F	11.34 micro m/m- °K
Thermal conductivity		21.7 BTU/ft- hr – °F	37.5 W/m – °K

		Longitudinal Properties Hardness
		Ultimate		Yield		Elongation	Reduction of area
Size Tested & Temperature		KSI	MPa	KSI	MPa	%	%
13” x 11”	Room Temp’	162	1117	137	945	15	55
13” x 11”	700°F (372°C)	142	979	114	786	30	76.6
13” x 11”	Room Temp’	160	1104	136	938	15	51.2
13” x 11”	700°F (372°C)	141	972	116	800	30	72.6
3”	Room Temp’	169	1166	136	938	18.1	55.9
3”	700°F (372°C)	145	1000	118	813	25.1	77.4
2 5/8”	Room Temp’	164	1131	145	1000	17.9	52.4
2 5/8”	700°F (372°C)	142	979	116	800	24	78.4
2 5/8”	Room Temp’	167	1151	140	965	18.7	57.5
2 5/8”	700°F (372°C)	144	993	112	772	23.4	75.9
2”	Room Temp’	164	1131	139	958	16.2	53.3
2”	700°F (372°C)	139	958	111	765	22.3	75.2

Steel Alloy 6305