What is 1 1 4CR material?
The main material of the A691GR 1-1/4CrCL22 longitudinal welded steel pipe is chromium-molybdenum alloy steel. Its chemical composition includes approximately 1.25% chromium (Cr) and 0.45% molybdenum (Mo), along with trace amounts of carbon (C), manganese (Mn), silicon (Si), and other elements. This alloy combination endows the steel pipe with excellent high-temperature strength and creep resistance, enabling it to perform stably under high-temperature and high-pressure conditions for extended periods. Additionally, the addition of chromium significantly enhances the pipe's corrosion resistance, particularly its ability to resist hydrogen sulfide corrosion in sulfur-containing media.
1 1 4 cr material properties
ASTM A691 is a standard established by the American Society for Testing and Materials (ASTM) for electric resistance welded carbon steel and alloy steel pipes for high-pressure applications. The designation "1-1/4CrCL22" refers to the material's chemical composition and mechanical performance grade. "1-1/4Cr" indicates a chromium content of approximately 1.25%, classifying it as a low-alloy chromium steel, while "CL22" corresponds to specific heat treatment conditions and mechanical property requirements. This material maintains excellent strength and toughness even at elevated temperatures, with a yield strength typically not less than 415 MPa, tensile strength exceeding 585 MPa, and elongation over 19%.
1 1 4 cr material equivalent
1 1 4 cr material specification
| Standard | ASTM A691 |
|---|---|
| Application | Standard Specification for Carbon and Alloy Steel Pipe, Electric-Fusion-Welded for High-Pressure Service at High Temperatures |
| Pipe Grade | Alloy Steel ASTM A691 Cl22,1 CR,1/2 CR,1 1/4 CR,2 1/4 CR, 3 CR,5 CR,9 CR,91,CM 65,CM70,CM75 |
| Class Designation | Class 10, 11, 12, 13, 20, 21, 22, 23, 30, 31, 32, 33, 34, 40, 41, 42, 43, 50, 51, 52, 53, 60, 61, 62, 63, 70, 71, 72, 73.. |
| Procedure | EFW, ERW, SEAMLESS, LSAW |
| Outer Diameter | 1/2"- 36" |
| Wall Thickness | SCH10, SCH20, SCH30, STD, SCH40, SCH60, XS, SCH80, SCH100, SCH12,0 SCH140, SCH160, XXS |
| Pipe Length | Single random length/Double random length 5m-14m,5.8m,6m,10m-12m,12m or as customer's actual request |
| Tolerance | OD: +/- 0.5 % of the specified outside diameter |
| WT: not more than 0.01 in. (0.3 mm) under the specified nominal thickness. | |
| Length: within −0,+1⁄2 in. (−0, +13 mm) of specified. | |
| Pipe Surface | Bare,Painting black,varnished,galvanized,anti-corrosion,PE PP/EP/FBE coating |
| Pipe End | Plain end/Beveled,protected by plastic caps on both ends, cut quare,grooved, threaded and coupling |
| Technical Method | Hot-rolled/Cold-drawn/Hot-expanded |
1 1 4 cr material pipe factory
