Delivering High Quality Stainless Steel and Alloy Piping Products — Pipes, Tubes, Fittings, Flanges and more for Global Industries.
sales@savoypipinginc.com
Delivering High Quality Stainless Steel and Alloy Piping Products — Pipes, Tubes, Fittings, Flanges and more for Global Industries.
sales@savoypipinginc.com
| Choose | When | Watch-outs |
|---|---|---|
| A691 1-1/4CR | EFW alloy route for large OD / project packages | State class + plate spec |
| A335 seamless | Seamless chrome-moly when required | Different product form |
| A691 hub | Sibling Cr grades | Confirm design metal temperature |
ASTM A691 Grade 1-1/4CR Class ____ OD: ____ Wall: ____ Qty: ____ HT/NDE: ____ MTC: 3.1/3.2 Destination: ____
Email sales@savoypipinginc.com with destination and any IBR / NACE / TPI notes.
Savoy Piping Inc. supplies ASTM A691 Grade 1-1/4CR / ASME SA691 Grade 1-1/4CR electric-fusion-welded chrome moly pipe — 1.25Cr-0.5Mo plate-welded pipe for high-pressure elevated-temperature service in large diameters where seamless chrome moly is impractical.
Typically fabricated from Cr-Mo pressure-vessel plate equivalent to ~1.25Cr-0.5Mo (A387 Gr.11 class plate families). Buyers usually need more than a grade name: specify class (heat treatment + radiography + pressure test), OD, wall, ends and documentation up front.
Where Grade 1-1/4CR fits: large-diameter headers, steam and process lines where seamless P11 is impractical. Matching seamless / tube products: ASTM A335 P11 and ASTM A213 T11.
Related grades: 1-1/4CR, 2-1/4CR, 5CR, 9CR, 91. Hub: ASTM A691 grades / ASME SA691.
| ASTM A691 1-1/4CR Alloy Steel EFW Pipes Specification | ASTM A691 / ASME SA691 |
| ASTM A691 1-1/4CR Alloy Steel EFW Pipes Grades | ASTM A691 / ASME SA691 Grade 1-1/4CR |
| ASTM A691 1-1/4CR Alloy Steel EFW Pipes Type | EFW (Electric Fusion Welded Pipes) |
| ASTM A691 1-1/4CR Alloy Steel EFW Pipes Class Designation | CLASS 10, 11, 12, 13, 20, 21, 22, 23, 30, 31, 32, 33, 40, 41, 42, 43 |
| ASTM A691 1-1/4CR Alloy Steel EFW Pipes Outer Diameter Size | 16" NB to 100" NB (Nominal Bore Size) |
| ASTM A691 1-1/4CR Alloy Steel EFW Pipes Wall Thickness | Schedule 20 to Schedule XXS (Heavier On Request) Up to 75 mm Thickness |
| ASTM A691 1-1/4CR Alloy Steel EFW Pipes Length | 5 to 7 Meters, 09 to 13 Meters, Single Random Length, Double Random Length And Customize Size. |
| ASTM A691 1-1/4CR Alloy Steel EFW Pipes Ends | Plain Ends / Beveled Ends / Coupling |
| ASTM A691 1-1/4CR Alloy Steel EFW Pipes Delivery Conditions | As Rolled, Normalizing Rolled, Thermomechanical Rolled / Formed, Normalizing Formed, Normalized and Tempered / Quenched and Tempered - BR / N / Q /T |
| ASTM A691 1-1/4CR Alloy Steel EFW Pipes Coating | Epoxy Coating / Colour Paint Coating / 3LPE Coating. |
| ASTM A691 1-1/4CR Alloy Steel EFW Pipes Other Testing | NACE MR0175, NACE TM0177, NACE TM0284, Charpy V-Notch Test, Radiograph HIC Examination, XRAY, Ultrasonic EXAMINATION, Liquid Penetrant, Magnetic Particle, HIC Test, SSC Test, SWC, H2 Service, IBR, PWHT Etc. |
| ASTM A691 1-1/4CR Alloy Steel EFW Pipes Dimension | All Pipes Is Manufactured and Inspected / Tested to the Relevant standards including ASTM, ASME, API. |
| ASTM A691 1-1/4CR Alloy Steel EFW Pipes Value Added Services | Draw / Expansion / Machining / Sand Blasting / Shot Blasting / Galavanizing / Heat Treatment |
| ASTM A691 1-1/4CR Alloy Steel EFW Pipes Packaging | Loose / Bundle / Wooden Pallet / Wooden box-a / Plastic Cloth Wraps / Plastic End Caps / Beveled Protector |
| ASTM A691 1-1/4CR Alloy Steel EFW Pipes Shipment & Transportation | By Road - Truck / Train, By Sea - Break-bulk Conventional Vessel / FCL (Full Container Load) / LCL (Less Container Load) / 20 Feet Container / 40 Feet Container / High Cube Container / Open Top Container, By Air - Freighter Civil Passenger and Cargo Planes |
| ASTM A691 1-1/4CR Alloy Steel EFW Pipes Material Test Certificate | Manufacturer Test Certificate As Per EN10204 3.1, 3.2 / Laboratory Test Certificate From NABL Approved Lab. / Under Third Party Inspection Agency Like SGS, TUV, DNV, LLOYDS, ABS ETC |
ASTM A691 / ASME SA691 Grade 1-1/4CR is electric-fusion-welded alloy steel pipe fabricated from pressure-vessel-quality plate for high-pressure service at elevated temperatures. Chemistry is about 1.00–1.50% chromium and 0.44–0.65% molybdenum.
Unlike seamless ASTM A335 P11, A691 Grade 1-1/4CR is made by forming and fusion-welding plate with filler metal. That makes it a practical route for larger OD and heavy fabrication packages, provided the specified class, NDE and heat treatment are met.
Always order grade + class together, and confirm weld procedure / PWHT requirements for the chrome moly chemistry involved.
1-1/4CR is the EFW counterpart chemistry to P11/T11. Choose 2-1/4CR when hotter steam/process duty needs ~2.25Cr-1Mo. Choose 5CR / 9CR for higher-chromium refinery/process service. Choose Grade 91 for CSEF modified 9Cr large-diameter systems.
| Class | Heat Treatment on Pipe | Radiography, see Section | Pressure Test, see: |
| A691 / SA691 EFW Pipe Class 10 | none | none | none |
| A691 / SA691 EFW Pipe Class 11 | none | 9 | none |
| A691 / SA691 EFW Pipe Class 12 | none | 9 | 8.3 |
| A691 / SA691 EFW Pipe Class 13 | none | none | 8.3 |
| A691 / SA691 EFW Pipe Class 20 | stress relieved, see 5.3.1 | none | none |
| A691 / SA691 EFW Pipe Class 21 | stress relieved, see 5.3.1 | 9 | none |
| A691 / SA691 EFW Pipe Class 22 | stress relieved, see 5.3.1 | 9 | 8.3 |
| A691 / SA691 EFW Pipe Class 23 | stress relieved, see 5.3.1 | none | 8.3 |
| A691 / SA691 EFW Pipe Class 30 | normalized, see 5.3.2 | none | none |
| A691 / SA691 EFW Pipe Class 31 | normalized, see 5.3.2 | 9 | none |
| A691 / SA691 EFW Pipe Class 32 | normalized, see 5.3.2 | 9 | 8.3 |
| A691 / SA691 EFW Pipe Class 33 | normalized, see 5.3.2 | none | 8.3 |
| A691 / SA691 EFW Pipe Class 40 | normalized and tempered, see 5.3.3 | none | none |
| A691 / SA691 EFW Pipe Class 41 | normalized and tempered, see 5.3.3 | 9 | none |
| A691 / SA691 EFW Pipe Class 42 | normalized and tempered, see 5.3.3 | 9 | 8.3 |
| A691 / SA691 EFW Pipe Class 43 | normalized and tempered, see 5.3.3 | none | 8.3 |
| Pipe Grade | Type of Steel | ASTM Specification | HB, max A | |
| Number | Grade | |||
| CM-65 | carbon-molybdenum steel | A 204/ A204M | A | 201 |
| CM-70 | carbon-molybdenum steel | A 204/ A204M | B | 201 |
| CM-75 | carbon-molybdenum steel | A 204/ A204M | C | 201 |
| CMSH-70 | carbon-manganese-silicon steel, normalized | A 537/A 537M | 1 | |
| CMS-75 | carbon-manganese-silicon steel | A 299/A 299M | … | … |
| CMSH-80 | carbon-manganese-silicon steel, quenched and tempered | A 537/A 537M | 2 | |
| 1/2 CR | 1/2 % chromium, 1/2 % molybdenum steel | A 387/ A 387M | 2 | 201 |
| 1CR | 1 % chromium, 1/2 % molybdenum steel | A 387/ A 387M | 12 | 201 |
| 1-1/4 CR | 1-1/4 % chromium, 1/2 % molybdenum steel | A 387/ A 387M | 11 | 201 |
| 2-1/4 CR | 2-1/2 % chromium, 1 % molybdenum steel | A 387/ A 387M | 22 | 201 |
| 3CR | 3 % chromium, 1 % molybdenum steel | A 387/ A 387M | 21 | 201 |
| 5CR | 5 % chromium, 1/2 % molybdenum steel | A 387/ A 387M | 5 | 225 |
| 9CR | 9 % chromium, 1 % molybdenum steel | A 387/ A 387M | 9 | 241 |
| 91 | 9 % chromium, 1 % molybdenum, vanadium-modified steel (CSEF) | A 387/ A 387M | 91 | 241 |
| Pipe Grade | ASTM Specification | Post-Weld Heat-Treat Temperature Range (Strees Relieving), F ( C) | Normalizing Temperature, max unless otherwise noted, F ( C) | Quenching Temperature, max unless otherwise noted, F ( C) | Tempering Temperature, min, F ( C) |
| CM-65 | A204/ A204M | 1100 to 1200 (59 to 650) | 1700 (925) | … | … |
| CM-70 | A204/ A204M | 1100 to 1200 (59 to 650) | 1701 (925) | … | … |
| CM-75 | A204/ A204M | 1100 to 1200 (59 to 650) | 1702 (925) | … | … |
| CMSH-70 | A537/A 537M | 1100 to 1200 (59 to 650) | 1703 (925) | … | … |
| CMS-75 | A 299/A 299M | 1100 to 1200 (59 to 650) | 1704 (925) | … | … |
| CMSH-80 | A537/A 537M | 1100 to 1200 (59 to 650) | A | 1700 (925) | 1100 to 1250 (59 to 675) |
| 1/2 CR | A387 / A387M | 1100 to 1300 (59 to 705) | 180 (1010) | 1700 (925) | 1150 to 1375 (620 to 74) |
| 1CR | A387 / A387M | 1100 to 1350 (59 to 730) | 181 (1010) | 1700 (925) | 1150 to 1375 (620 to 74) |
| 1-1/4 CR | A387 / A387M | 1100 to 1375 (59 to 74) | 182 (1010) | 1700 (925) | 1150 to 1375 (620 to 74) |
| 2-1/4 CR | A387 / A387M | 1200 to 1400 (650 to 760) | 183 (1010) | 1700 (925) | 1250 to1400 (675 to 760) |
| 3CR | A387 / A387M | 1200 to 1400 (650 to 760) | 184 (1010) | 1700 (925) | 1250 to1400 (675 to 760) |
| 5CR | A387 / A387M | 1200 to 1400 (650 to 760) | 185 (1010) | 1700 (925) | 1300 to 1400 (705 to 760) |
| 9CR | A387 / A387M | 1325 to 1375 (715 to 74) | B | … | 1325 to 1375 (715 to 74) |
| 91 | A387 / A387M | 1350 to 1420 (730 to 770) | 1350 to 1420 (730 to 770) | 190 min (1040 min) | 1350 to 1440 (730 to 780) |
B 9CR steel is an air-hardenable steel, at times retaining down to near atmospheric temperature. Good practice is to allow the steel to cool to 15 F or Lower before subjecting the steel to a tempering treatment or post-weld heat treatment.
ASTM A691 Grade 1-1/4CR is electric-fusion-welded chrome moly pipe (~1.25Cr-0.5Mo) made from pressure-vessel-quality plate for high-pressure, elevated-temperature service — typically large diameters where seamless pipe is difficult or uneconomical.
Chemistry intent is similar (~1.25Cr-0.5Mo), but A335 P11 is seamless pipe while A691 1-1/4CR is EFW pipe fabricated from plate with filler metal. A691 is commonly used for larger OD / heavier fabrication packages and is ordered by grade plus class.
Class designates manufacturing heat treatment, whether the weld is radiographically examined, and whether the pipe is pressure tested. Always specify both grade and class on the purchase order.
A691 nominally covers larger pipe (commonly from about 16" OD upward) with substantial wall thickness. Other dimensions may be furnished when they meet the specification. Confirm OD, wall, class and testing on the enquiry.
We supply this product for domestic and export projects with MTC (EN 10204 3.1 standard; 3.2 / TPI on request). Include destination, Incoterms and inspection needs on the RFQ.