Description
ASTM A333 Seamless Steel Pipe for Low-Temperature Service and Other Applications with Required Notch Toughness
This specification covers wall seamless and welded carbon and alloy steel pipe intended for use at low temperatures. The pipe shall be made by the seamless or welding process with the addition of no filler metal in the welding operation. All seamless and welded pipes shall be treated to control their microstructure. Tensile tests, impact tests, hydrostatic tests, and nondestructive electric tests shall be made in accordance with specified requirements.
OD: NPS 1/8″ TO 30″
WT: 2.0mm-60mm Schedule: SCH40, SCH60, XS, SCH80, SCH100, SCH120, SCH140, SCH160, XXS
Grade: ASTM A333 Gr. 1,Gr. 3, Gr. 6…
Single Random: 17′ ~ 24′ lengths
Double Random: 36′ ~ 44′ lengths
A333 PIPE CHEMICAL COMPOSITION
The chemical composition of A333 LTCS pipes:
| A333 PIPE | 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 | |||
MECHANICAL PROPERTIES
The table shows the mechanical properties of LTCS pipes in MPa (first table) and PSI (second table):
| A333 PIPE | Tensile Strength (Mpa) | Yield Strength (Mpa) |
Elongation Y | Elongation 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 |
| A333 PIPE | A333 Gr. 1 | A333 Gr. 3 | A333 Gr. 6 |
| Tensile Strength (min PSI) | 55,000 | 65,000 | 60,000 |
| Yield Strength (min PSI) | 30,000 | 35,000 | 35,000 |
TESTING REQUIREMENTS
IMPACT TEST
Low-temperature carbon steel pipes are supplied in normalized conditions and the Charpy impact test is always executed at specific temperatures to ensure the compliance of the products to the temperature range set by the standard (carbon steel temperature limit for A333 pipes).
| Grade | F° | C° |
| ASTM A333 Grade 1 | -50 | -45 |
| ASTM A333 Grade 3 | -150 | -100 |
| ASTM A333 Grade 4 | -150 | -100 |
| ASTM A333 Grade 6 | -50 | -45 |
| ASTM A333 Grade 7 | -100 | -75 |
| ASTM A333 Grade 8 | -320 | -195 |
| ASTM A333 Grade 9 | -100 | -75 |
| ASTM A333 Grade 10 | -75 | -60 |
MECHANICAL TESTS
The mechanical testing on low-temperature carbon steel pipes shall be executed as follows:
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transverse/longitudinal tension/flattening/hardness/bend: tests to be made on 5% of the pipe from each treated lot. For smaller lots, at least one pipe has to be tested. For material heat treated by the continuous process, tests shall be made on a sufficient number of pipe to constitute 5% of the lot, but in no case less than 2 pipes.
-
Hydrostatic/ impact/one notched bar impact: shall be made from each heat represented in a heat-treatment load on specimens taken from the finished pipe.
Alloy Steel – Carbon Steel – Low-Temperature Services – Notch Toughness – Seamless Pipes And Tubes – Seamless Steel Pipes – Welded Pipes And Tubes – Welded Steel Pipes
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sales@metal-pipe.com,HSH stocks a broad range of metal materials, including aluminum, steel, stainless steel, copper and brass, and specialty metals. Also, we also sell cast fittings, cast Iron, forged fittings, cutting tools, flanges, ect. If you have any needs about our products, you can contact us.
sales@metal-pipe.com