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Fabricated using superior quality tungsten alloyed low alloy steel (UNS K41650), astm a182 f23 flanges are designed to operate under stress and temperature intensive conditions in power plant boilers, oil refineries, and heavy duty petrochemical facilities. The unique composition of a182 f23 alloy consisting of 1.90 – 2.60% chromium, 1.45 – 1.75% tungsten, together with vanadium, molybdenum, columbium, and boron alloys ensures excellent creep rupture properties, thermal fatigue resistance, and mechanical strength even up to 600°C. Following ASME B16.5 and B16.47 dimensional specifications, we offer complete range of astm a182 f23 flange types including astm a182 f23 weld neck flange, f23 slip on flange, and f23 blind flange within Class 150 – Class 2500 pressures. Supplied in normalized and tempered condition, each sa182 f23 flange meets robust a182 f23 mechanical properties (minimum 510 MPa tensile strength and 400 MPa yield strength) matching international f23 flange equivalent specifications such as UNS K41650, Code Case 2199, and ASME SA182 F23.
Solitaire Overseas is a premier stockist, manufacturer, and exporter of high-precision industrial forgings and alloy piping components based in India. We supply fully certified high-pressure piping solutions to global markets with complete EN 10204 3.1 material test report traceability.
| Parameter | Specification |
|---|---|
|
Material |
ASTM A182 or ASME SA182 F23, UNS K41650 |
|
Also known as |
2.25Cr 1.6W flange, chrome moly tungsten flange, 7CrWVMoNb9 6 flange |
|
Dimension Standards |
ASME B16.5 for NPS 1/2 to 24, ASME B16.47 for large weld neck and blind sizes, MSS SP 44 |
|
Facing |
Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ) |
|
Types |
Weld neck, long weld neck, slip on, blind, spectacle blind, spacer, socket weld, RTJ |
|
Production |
Forged, then normalised and tempered |
|
Testing |
Hardness test, PMI for tungsten and vanadium, impact test on request, hydrostatic test on request |
|
Certification |
Mill Test Certificate EN 10204 3.1, 3.2 on request, third party inspection on request |
Flanges above NPS 24 follow ASME B16.47. Send us the size, class and series with your enquiry and we will confirm what can be forged.
| Elements | Composition % |
|---|---|
|
Carbon |
0.04 – 0.10 |
|
Manganese |
0.10 – 0.60 |
|
Phosphorus |
0.030 max |
|
Sulfur |
0.010 max |
|
Silicon |
0.50 max |
|
Nickel |
0.40 max |
|
Chromium |
1.90 – 2.60 |
|
Molybdenum |
0.05 – 0.30 |
|
Columbium |
0.02 – 0.08 |
|
Titanium |
0.005 – 0.060 |
|
Vanadium |
0.20 – 0.30 |
|
Boron |
0.0010 – 0.006 |
|
Nitrogen |
0.015 |
|
Aluminium |
0.030 |
|
Tungsten |
1.45 – 1.75 |
| Property | Value |
|---|---|
|
Tensile Strength, min, ksi [MPa] |
74 [510] |
|
Yield Strength, min, ksi [MPa] |
58 [400] |
|
Elongation in 2 in. [50 mm] or 4D, min, % |
20 |
|
Reduction of Area, min, % |
40 |
|
Brinell Hardness Number, HBW |
220 max |
ASTM A182 Grade F23 tungsten-modified low-alloy steel flanges are specified for extreme high-temperature steam and severe-service pressure piping:
Need certified F23 flanges?
Contact Solitaire Overseas Today for live stock and ex-factory quotes.
It is a forged 2.25 chromium, 1.6 tungsten steel with vanadium and niobium, made to ASTM A182 for high temperature boiler and HRSG piping.
The forging carries UNS K41650. Do not confuse it with UNS K40712, which belongs to the matching A213 T23 tube and A335 P23 pipe.
The nearest European designation is 7CrWVMoNb9 6, Werkstoff 1.8201. Check the full chemistry and your project code before treating any grade as an exact match.
F23 is the forged flange grade. T23 is seamless tube and P23 is pipe. Boron and nitrogen limits differ, so quote the forging grade for flanges.
F23 adds tungsten, vanadium, niobium and boron to the 2.25 chromium base, which lifts creep strength above F22. F22 is simpler and widely stocked.
A welded joint on F23 normally needs preheat, controlled heat input and PWHT as set by your piping code and qualified welding procedure.
Tell us the size, class, facing, quantity and design code, and we will respond with a quote. You can also Get an Instant Quote & Stock Check
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