ASTM A182 F53 WeldNeck Raised Face Flange, Super Duplex Stainless Steel Forged WN RF Flange
Brief Introduction
ASTM A182 F53 WN RF Flange is a high-performance super duplex stainless steel forged flange, strictly manufactured in accordance with ASTM A182 and ASME B16.5 standards. F53 (UNS S32750) is a super duplex stainless steel grade, featuring a dual-phase microstructure of austenite and ferrite, which integrates ultra-high mechanical strength, excellent corrosion resistance (especially against chloride-induced pitting, crevice corrosion and stress corrosion cracking), and good weldability. As a Weld Neck (WN) flange with Raised Face (RF), it offers high structural integrity, low stress concentration, and reliable sealing performance, specially designed for harsh, high-corrosion, high-pressure industrial piping systems, widely used in offshore, oil & gas, chemical and other critical applications.
Chemical Composition Analysis (wt%)
| Alloy Grade |
C |
Mn |
Si |
P |
S |
Cr |
Ni |
Mo |
N |
| ASTM A182 F53 (UNS S32750) |
≤0.03 |
≤1.20 |
≤0.80 |
≤0.035 |
≤0.020 |
24.0-26.0 |
6.0-8.0 |
3.0-4.0 |
0.24-0.32 |
Typical Mechanical Properties
| Mechanical Property |
Standard Requirement (Min.) |
Typical Value |
| Yield Strength (Rp0.2), MPa |
≥550 |
580-650 |
| Tensile Strength (Rm), MPa |
≥795 |
800-900 |
| Elongation (A), % |
≥25 |
28-35 |
| Hardness (HB), Brinell |
≤310 |
240-290 |
| Impact Toughness (KV), J (-40℃) |
≥60 |
70-100 |
| Ferrite Content, % |
30-70 |
40-60 |
| Max. Working Temperature |
315℃ (Long-term) |
315℃ |
Available Tests
| Test Type |
Standard |
| Chemical Composition Analysis (PMI) |
Spectrometer (XRF/OES), ASTM E1019 |
| Tensile & Impact Test |
ASTM E8/E8M, ASTM A370, Charpy V-Notch |
| Hardness Test |
ASTM E10 (Brinell), ASTM E18 (Rockwell) |
| Ferrite Number Test |
ASTM E1928, Ferrite Scope Test |
| Hydrostatic/Pneumatic Pressure Test |
ASTM A182, ASME B16.5 |
| Non-Destructive Testing (NDT) |
UT, RT, MT, PT (ASTM E165), Eddy Current Test |
| Corrosion Resistance Test |
ASTM G48 (Pitting/Crevice Corrosion), Salt Spray Test (ASTM B117) |
| Dimensional & Visual Inspection |
ASME B16.5, CMM, Gauge Inspection |
| Microstructure Inspection |
ASTM E45, Metallographic Microscope Test |
| Material Test Certificate (MTC) |
EN 10204 3.1/3.2 |
Product Application Scope
| Industry Field |
Typical Applications |
| Offshore & Marine Engineering |
Offshore platforms, marine pipelines, seawater cooling systems, offshore oil & gas production equipment |
| Oil & Gas Industry |
Oil & gas transmission pipelines, wellhead manifolds, downhole equipment, refinery corrosive process lines |
| Chemical & Petrochemical |
Chemical reagent conveying pipelines, acid-base processing systems, petrochemical reactors, corrosive fluid storage tank connections |
| Seawater Desalination |
Seawater desalination plant pipelines, reverse osmosis systems, brine treatment pipelines |
| Desulfurization Systems |
Power plant flue gas desulfurization (FGD) pipelines, desulfurization towers, absorber connections |
| Other Harsh Environments |
Pulp and paper industry, mining, high-chloride wastewater treatment, chemical processing equipment |
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