A691 1/2 CR Alloy Welded Pipe
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What type of steel is A691 Gr 1/2 CR welded pipe?
A691 Gr 1/2 CR alloy welded pipe is a chromium-molybdenum alloy steel that combines strength, toughness and excellent corrosion resistance.
What are the applications of A691 Gr 1/2 CR straight seam steel pipe?
A691 Gr 1/2 CR alloy steel pipe is commonly used in high temperature environments such as pressure vessels, heat exchangers, piping systems, boilers, etc.
In order to improve the mechanical properties of A691 1/2CR carbon alloy steel pipe, in addition to carbon, alloy steel also contains a large number of elements such as nickel, tungsten, molybdenum, chromium, silicon, manganese, vanadium and a small amount of commonly used elements. The addition of these alloying elements increases Strength, chemical resistance and hardness of steel.
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ASTM A691 1/2 CR Pipe specifications:
| Type |
ASTM A691 GRADE 1/2 CR Alloy Steel Pipes |
|---|---|
| Standard | ASTM A691 / ASME SA691 |
| Schedule | SCH 5, SCH 10, SCH 40, SCH 80 SCH 160 |
| Size Range | 16" to 100" |
A691 1/2 Cr Straight seam steel pipe Chemical Composition
|
C |
Si |
Mn |
P |
S |
Mo |
Cr |
|
0.05-0.17 |
0.15-0.4 |
0.40-0.65 |
0.025 |
0.025 |
0.45-0.6 |
0.80-1.15 |
A6911/2 Cr Alloy tube Mechanical Property
|
Class |
Tensile Strength, MPa |
Yield Strength, MPa |
Elongation, % |
|
Class 1 |
380 - 550 |
230 min |
22 |
|
Class 2 |
450 - 585 |
275 min |
22 |
ASME SA691 1/2CR EFW Pipe Heat Treatment
| Pipe Grade | ASTM Specification | Post-Weld Heat-Treat Temperature Range (Stress Relieving), °F (°C) | Normalizing Temperature max unless otherwise noted, | Quenching Temperature max unless otherwise noted,°F (°C) | Tempering Temperature, min, °F (°C) |
| 1/2CR | A 387/A 387M | 1100 to 1300 (590 to 705) | 1850 (1010) | 1700( 925) | 150 to 1375 (620to745 |
A691 1/2 CR Alloy tube

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gnee has 14 steel production lines, 10 processing equipment for processing, bending, painting, heat treatment, cutting, drilling, beveling, tempering, surface treatment, complete testing equipment and strong technical force. The annual production capacity is more than 60,000 tons.
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FAQ
1. Can I get a sample before ordering?
Yes of course. Usually our samples are free. We can produce according to your samples or technical drawings. We can manufacture molds and fixtures.
2. How can you guarantee that what I get will be good?
We are a factory with 100% pre-delivery inspection to ensure quality.
3. How do you make our business establish a long-term and good relationship?
1. We maintain good quality and competitive prices to ensure our customers benefit;
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