Specifications
The following specifications cover Carbon Steels A333 Grade 6
Standard Specification for Seamless and Welded Steel Pipe for Low-Temperature Service
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Physical Data :
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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
| 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. |
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| Applications | | Used for low temperature service piping down to minus 50 F. |
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| Machinability | | Machinability is good, similar to law alloy 4032 steel. |
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| Forming | | The product comes in piping form but may be formed readily by conventional methods. |
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| Welding | | Weldable by conventional methods. |
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| 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. |
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| Forging | | Product is supplied in pipe form and not normally forged from that shape. |
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| 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. |
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| Cold Working | | Cold working may be done by conventional methods. |
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| Annealing | | Anneal, or normalize, at 1600 F and air cool. |
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| Aging | | Not applicable. |
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| Tempering | | See "Heat Treatment" |
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| Hardening | | Hardens from cold working or heat treatment. See "Heat Treatment". |
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| 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. |
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Physical Data :
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| 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/… |