Properties of Carbon Steels A333 Grade 6

Specifications
The following specifications cover Carbon Steels A333 Grade 6
Standard Specification for Seamless and Welded Steel Pipe for Low-Temperature Service 

• ASTM A106 (B) (Pipe- Seamless)
• ASTM A234 (WPB)
• ASTM A333 Grade 6
• ASTM A334 Grade 6
• ASTM A369 (FPB) (Forging - Open Die)
• ASTM A556 (C2)
• UNS K03006

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Principal Design Features		This specification covers seamless and welded steel pipe for low temperature service. The Grade 6 alloy steel involved is similar to AISI 4032 low alloy steel.

Applications		Used for low temperature service piping down to minus 50 F.

Machinability		Machinability is good, similar to law alloy 4032 steel.

Forming		The product comes in piping form but may be formed readily by conventional methods.

Welding		Weldable by conventional methods.

Heat Treatment		Product is supplied in the normalized, 1500 f and air cooled, condition. It may be quenched and tempered by heating to 1475 F, quench in circulating water and then temper by re-heating to 1100 F and rapid air cooling.

Forging		Product is supplied in pipe form and not normally forged from that shape.

Hot Working		Hot working may be done qt 2000 F down to 1600 F if need be. Do not hot work below 1550 F and immediately following hot working cool in a controlled atmosphere furnace from a temperature above 1550 F.

Cold Working		Cold working may be done by conventional methods.

Annealing		Anneal, or normalize, at 1600 F and air cool.

Aging		Not applicable.

Tempering		See "Heat Treatment"

Hardening		Hardens from cold working or heat treatment. See "Heat Treatment".

Other Comments		Grade 6 is a low alloy steel similar to 4032 in properties. Tensile strength requirement for Grade 6 is 60 ksi minimum and notched-bar impact strength is 4 to 13 ft. lbs. depending upon section size.

Physical Data : 

Density (lb / cu. in.)	0.284
Specific Gravity	7.9
Specific Heat (Btu/lb/Deg F - [32-212 Deg F])	0.105
Melting Point (Deg F)	2750
Thermal Conductivity	360
Mean Coeff Thermal Expansion	6.3
Modulus of Elasticity Tension	30
Modulus of Elasticity Torsion	11

Chemical Composition (%)

	Grade 1	Grade 6	Grade 10
Carbon, max	0.30	0.30	0.20
Manganese	0.40-1.06	0.29-1.06	1.15-1.50
Phosphorus, Sulfur, max	0.025	0.025	0.035/0.015
Silicon, min	…	0.10	0.10-0.35
Nickel, max	…	…	0.25
Chrome, Copper, max	…	…	0.15
Columbium, Molybdenum, max	…	…	0.05
Aluminum, max	…	…	0.06
Vanadium, max	…	…	0.12

Mechanical Properties

	Grade 1	Grade 6	Grade 10
Tensile strength, min, (MPa)	380	415	550
Yield strength, min, (MPa)	205	240	450
Elongation, min, (%), L/T	35/25	30/16.5	22/…

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