A333 pipe is furnished to nine different grades designated by numbers 1, 3, 4, 6, 7, 8, 9, 10, & 11.
Sunny Steel Supply supplies a full range of ASTM A333 (ASME S/A 333)
Low Temperature Steel Pipe Specifications & Grades
· SA333 & A333 – Grades 1, 3, 6 & 8
· A671 CC65 CL22 EFW at -50°F (Welded Alternative to A333)
· Flanges: A/SA 350 LF2, LF3
· Fittings: A/SA-420 WPL6, WPL3
Size range
· 1/4” Nominal to 24”O.D.
· Wall Thickness – Schedule 10 through XXH
· Unscheduled heavy wall pipe thicknesses available up to 4 inches.
Strike temperature condition：
Crade | The lowest temperature for strike test | |
℉ | ℃ | |
ASTM A333 Grade 1 | -50 | -45 |
ASTM A333 Grade 6 | -50 | -45 |
Mechanical requiremnts of ASTM A333 alloy pipe
Grade | Tensile Strength (MPa） | Yield Point (MPa) | Elongation (%) | |
Y | X | |||
Grade 1 | ≥380 | ≥205 | ≥35 | ≥25 |
Grade 3 | ≥450 | ≥240 | ≥30 | ≥20 |
Grade 4 | ≥415 | ≥240 | ≥30 | ≥16.5 |
Grade 6 | ≥415 | ≥240 | ≥30 | ≥16.5 |
Grade 7 | ≥450 | ≥240 | ≥30 | ≥22 |
Grade 8 | ≥690 | ≥515 | ≥22 | |
Grade 9 | ≥435 | ≥315 | ≥28 | |
Grade 10 | ≥550 | ≥450 | ≥22 | |
Grade 11 | ≥450 | ≥240 | ≥18 | |
Chemical Composition (%) of ASTM A333 steel pipe
Grade | Chemical Composition (%) | ||||||||||
C | Si | Mn | P | S | Cr | Ni | Cu | Mo | V | Al | |
Grade 1 | ≤0.30 | 0.40-1.06 | ≤0.025 | ≤0.025 | |||||||
Grade 3 | ≤0.19 | 0.18-0.37 | 0.31-0.64 | ≤0.025 | ≤0.025 | 3.18-3.82 | |||||
Grade 4 | ≤0.12 | 0.18-0.37 | 0.50-1.05 | ≤0.025 | ≤0.025 | 0.44-1.01 | 0.47-0.98 | 0.40-0.75 | 0.04-0.30 | ||
Grade 6 | ≤0.30 | ≥0.10 | 0.29-1.06 | ≤0.025 | ≤0.025 | ||||||
Grade 7 | ≤0.19 | 0.13-0.32 | ≤0.90 | ≤0.025 | ≤0.025 | 2.03-2.57 | |||||
Grade 8 | ≤0.13 | 0.13-0.32 | ≤0.90 | ≤0.025 | ≤0.025 | 8.40-9.60 | |||||
Grade 9 | ≤0.20 | 0.40-1.06 | ≤0.025 | ≤0.025 | 1.60-2.24 | 0.75-1.25 | |||||
Grade 10 | ≤0.20 | 0.10-0.35 | 1.15-1.50 | ≤0.03 | ≤0.015 | ≤0.15 | ≤0.25 | ≤0.015 | ≤0.50 | ≤0.12 | ≤0.06 |
Grade 11 | ≤0.10 | ≤0.35 | ≤0.6 | ≤0.025 | ≤0.025 | ≤0.50 | 35.0-37.0 | ≤0.50 | |||
Heat Treatment:
Grades 1 and 6 shall be heat treated to control their microstructure.
ASTM A333 Grade 6 and ASME SA 333 Grade 6 are heat treated to achieve normalized condition @ 920 degrees Celsius with controlled microstructure.
Specific Impact requirements
The raw material used for low temperature service pipe is ALUMINIUM killed with high proportion of manganese (more than 1%) combined with low proportions of carbon (less than 0.23%).For low temperature pipe to be certified as LTCS additional impact test should be conducted at low temperatures, as per mandatory requirements in section 8 of ASTM A 333.
Production specification range of low temperature pipe products
No. | Order No. | Size description | ||
O.D. /mm | W.T. /mm | Legnth /m | ||
1 | A333 Gr.6 A333 Gr.6/X42NS | 10～127 | 1～20 | 6～12.0 |
42～114.3 | 3.5～6 | 6～12.2 | ||
42～114.3 | 6～12 | 6～12.2 | ||
114.3～180 | 3.8～8 | 6～12.2 | ||
114.3～180 | 8～22 | 6～12.2 | ||
68～180 | 10～14 | 6～12.2 | ||
69～254 | 14～55 | 6～12.2 | ||
140～340 | 6～8 | 6～12.2 | ||
140～368 | 8～42 | 6～12.2 | ||
318～720 | 14～50 | 4～12.5 | ||
2 | A333 Gr.6/X52QS | 42～114.3 | 3.5～12 | 6～12.2 |
114.3～180 | 3.8～22 | 6～12.2 | ||
68～254 | 10～40 | 6～12.2 | ||
140～368 | 6～40 | 6～12.2 | ||
318～720 | 14～40 | 4～12.5 | ||
140～368 | 6～25 | 6～12.2 | ||
318～720 | 14～25 | 4～12.5 | ||
3 | 16MnDG | 10～127 | 1～20 | 6～12.0 |
42～114.3 | 3.5～12 | 6～12.2 | ||
114.3～180 | 3.8～22 | 6～12.2 | ||
68～254 | 10～55 | 6～12.2 | ||
140～368 | 6～42 | 6～12.2 | ||
318～720 | 14～120 | 4～12.5 | ||
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