What is ASTM A672?
A672 pipe is an electric (resistance) fusion-welded steel pipe primarily used for medium and low-pressure fluid transportation. Its material is mainly carbon steel, and it is manufactured through the electric fusion welding process, offering good strength and pressure resistance. This type of pipe is commonly used in industries such as petroleum, chemical, and electric power, and is suitable for conveying media such as water, oil, and gas.
What is the specification of ASTM A672?
| Standard | ASTM A672 |
|---|---|
| Procedure | EFW |
| Dimensions | 400mm in outside diameter or larger, 16″- Larger, DN6 – DN650 |
| Thickness | ≤75mm, SCH 40 – SCH 160 |
| Unit Length | 6 meters(20feet) |
| Steel Grade | ASTM A672 A 45, ASTM A672 B 70, ASTM A672 D70, ASTM A672 J90, ASTM A672 L70, ASTM A672 A 50, ASTM A672C 55, ASTM A672 D80, ASTM A672 J100, ASTM A672 L75, ASTM A672 A 55, ASTM A672 C 60, ASTM A672 H75, ASTM A672 K75, ASTM A672 N75, ASTM A672 B 60, ASTM A672 C 65, ASTM A672 H80, ASTM A672 K85, ASTM A672 B 65, ASTM A672 C 70, ASTM A672 J80, ASTM A672 L65 |
| Surface Coating | Varnishing, Black, Oiling, Hot Dip Galvanizing |
| End Type | Square cut, Bevelled, Threaded, Grooved |
| Joint Method | Fitting, Flange, Coupling, Clamp, Pipe Shoulder, Welding |
| Pipe Machining | Welding, Bending, Hole Drilling, Punching, Swaging, Tapering, Flaring, Expanding |
What is the yield strength of ASTM A672?
| ASTM A672 Steel Pipe Properties | Steel Grade | BASE METAL MECHANICAL COMPOSITION | Welding point tensile strength (N/mm2) | Remarks | |||
|---|---|---|---|---|---|---|---|
| Yield point (N/mm2) | Tensile Stregth (N/mm2) | Test Pieces | Elongation (%) | ||||
| Pipes for pressure service ASTM A672 | -/A45 | -/165 | -/310~450 | - | -/30 | -/310~450 | A672/ A672 |
| -/A50 | -/185 | -/345~485 | -/28 | -/345~485 | |||
| CA55/A55 | 205 | 380~515 | 27 | 380~515 | |||
| B55 | -/205 | -/380~515 | -/27 | -/380~515 | |||
| CB60/B60 | 220 | 415~550 | 25 | 415~550 | |||
| CB65/B65 | 240 | 450~585 | 23 | 450~585 | |||
| CB70/C70 | 260 | 485~620 | 21 | 485~620 | |||
| C55 | -/205 | -/380~515 | -/27 | -/380~515 | |||
| CC60/C60 | 220 | 415~550 | 25 | 415~550 | |||
| CC65/C65 | 240 | 450~585 | 23 | 450~585 | |||
| CC70/C70 | 260 | 485~620 | 21 | 485~620 | |||
ASTM A672 Pipe Chemical Composition
| Specification | Steel grade | Chemical composition | Remarks | |||||
|---|---|---|---|---|---|---|---|---|
| C | Si | Mn | P | S | Ti | |||
| Pipes for pressure service ASTM A672 |
-/A45 | -/0.17 | - | 0.98 | 0.035 | 0.035 | - | A672/ A672 |
| -/A50 | -/0.22 | - | ||||||
| CA55/A55 | 0.28 | - | ||||||
| B55 | -/0.20 | 0.13 ~0.45 |
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| CB60/B60 | 0.24 | |||||||
| CB65/B65 | 0.28 | |||||||
| CB70/C70 | 0.31 | 1.30 | ||||||
| C55 | -/0.18 | 0.55 ~0.98 |
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| CC60/C60 | 0.21 | |||||||
| CC65/C65 | 0.24 | 0.79 ~1.30 |
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| CC70/C70 | 0.27 | |||||||
What is the difference between A671 and A672?
| Comparison Item | A671 | A672 |
|---|---|---|
| Application Scope | Typically used for general-purpose steel pipes at atmospheric and lower temperatures; commonly applied in petroleum, chemical, boiler, and power plant industries for transporting fluids such as water, oil, and gas. | Specifically used for steel pipes in medium and low-temperature pressure vessels that can withstand certain pressures; suitable for operating environments from -20°C to 300°C; often used in manufacturing chemical equipment and storage tanks. |
| Material Characteristics | Mainly carbon steel; produced through continuous welding; has good weldability and certain low-temperature toughness. | Based on carbon-manganese steel with trace alloying elements such as vanadium and niobium; exhibits excellent comprehensive properties, including pressure resistance, good weldability, and processability. |
| Manufacturing Process | Continuous welding, efficient and suitable for large-scale production. | Electric fusion welding, ensuring quality and performance of the weld seam. |
A672 Electrofusion Welded (EFW) Steel Pipe factory
