Product Overview
The ASTM A182 F53 Flange is a pipe connection component forged from super duplex stainless steel UNS S32750 (commonly known as 2507), manufactured strictly to ASME B16.5 dimensional standards. Through its high-alloy formulation of 25%Cr + 3.5%Mo + 0.27%N, F53 achieves a Pitting Resistance Equivalent Number (PREN) of 41–43, a Critical Pitting Temperature of 55–70°C, and a yield strength approximately twice that of 316L, making it an ideal flange material for seawater, high-chloride, and sour oil and gas service.
Our F53 flanges are delivered in the solution annealed + water quenched condition, with sizes covering NPS ½"–24"(ASME B16.5 standard range) and pressure classes from Class 150 to 2500. They are widely used in seawater desalination, subsea pipelines, oil and gas production, and chemical process systems.
A182 F53 UNS S32750 B16.5 Super Duplex stainless steel flange
Our main products: Stainless/Duplex/Nickel Alloy Pipe/Tube/Fitting/Flange:
1->A:Stainless Steel Grade: TP304/304L/304H, TP310S/310H, TP316/316L/316Ti/316H, TP317L/317LN, TP321/321H, TP347/347H, NO8904(904L),
B:PH Stainless Steel:17-4PH(1.4542), 17-7PH(1.4568),15-7PH(1.4532)
C:Duplex Steel Grade: S31803(2205), S32750(2507), S32760, S32304, S32101, S31254(254Mo), 235Ma, UNS NO8926, NO8367.
D:Nickel Alloy Steel Grade: Hestalloy: C-276, C-4, C-22, C-2000, X, B-2, B-3, G-30, G-35. Monel: 400,401, 404, R-405, K500. Inconel: 600, 601, 617, 625, 690, 718, 740, X-750. Incoloy: 800, 800H, 800HT, 825, 840. Pure Nickel: Ni-200, Ni-201, Ni-270. NS Alloy: Ns1101, NS1102, NS1103,NS3105.
2-> Standards: ASTM A213, A249, A269, A312, A789,A790, B163,B167, B444, B677,... and ASME,DIN, EN, JIS, BS, GOST,...
3-> Out diameter sizes range: 0.5mm~650mm. Wall thickness:0.05mm~60mm. Max. length under 26 meters/PC.
4-> Seamless & welded, Solution Pickling/Bright Annealed / Polished.
A182 F53 stainless steel flange Specification
Specification | ASTM A182 / ASME SA182 F53 |
UNS Grade | UNS S31803, S32205, S2205, S32550, S32750, S32760. |
Standard | ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, etc. |
Size | 1/2” to 24″ |
Dimensions | ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc. |
Class / Pressure | 150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc. |
A182 F53 stainless steel flange Chemical Composition
Weight% | C | Mn | P | S | Si | Cr | Ni | Mo | N | Cu |
Super Duplex F53 | 0.03 max | 1.2 max | 0.035 max | 0.015 max | 0.8 max | 24-26 | 6-8 | 3-5 | 0.3 | 0.5 max |
ASME SA403 WP316L Stainless Steel Pipe Fittings Mechanical Properties
Alloy | Tensile Strength ksi | Proof Strength | Elongation | Hardness Rockwell C |
Super Duplex F53 Annealed Condition | 110-135 | 80 | 15 | 28 max |
A182 F53 stainless steel flange Application Industries
- 1. Off-Shore Oil Drilling Companies
- 2. Power Generation
- 3. Petrochemicals
- 4. Gas Processing
- 5. Specialty Chemicals
- 6. Pharmaceuticals
- 7. Pharmaceutical Equipment
- 8. Chemical Equipment
- 9. Sea Water Equipment
- 10. Heat Exchangers
- 11. Condensers
- 12. Pulp and Paper Industry
A182 F53 stainless steel flangesTest Certificates
- 1. EN 10204/3.1B,
- 2. Raw Materials Certificate
- 3. 100% Radiography Test Report
- 4. Third Party Inspection Report, etc
Material Testing:
- 1. Mechanical Testing Such as Tensile of Area
- 2. Hardness Test
- 3. Chemical Analysis – Spectro Analysis
- 4. Positive Material Identification – PMI Testing
- 5. Flattening Test
- 6. Micro and MacroTest
- 7. Pitting Resistance Test
- 8. Flaring Test
- 9. Intergranular Corrosion (IGC) Test
FAQ
Q1: Are F53, S32750, and 2507 the same material?
Yes. F53 is the grade designation in the ASTM A182 standard, UNS S32750 is the American unified numbering system designation, and 2507 is Alleima's (formerly Sandvik) commercial trade name SAF 2507, with the EN designation being 1.4410.
Q2: What is the difference between F53 and F51 (2205)?
F53 is a super duplex stainless steel, while F51 is a standard duplex stainless steel. Key differences: F53 has higher chromium content (25% vs 22%), PREN of 41–43 (F51 is 34–36), Critical Pitting Temperature of 55–70°C (F51 is 35–45°C), and yield strength of 550 MPa (F51 is 450 MPa).
Q3: What is the maximum service temperature of F53 flanges?
315°C. Above this temperature, F53 embrittles due to sigma phase precipitation, and mechanical properties drop significantly. ASME B16.5 pressure-temperature tables explicitly specify that F53 must not be used above 315°C.
Q4: Do F53 flanges require post-weld heat treatment?
Generally not required. F53 does not require overall heat treatment after welding, but note: avoid slow cooling through the 500–800°C range to prevent sigma phase precipitation. ER2209 or ER2594 filler metal is recommended, with controlled heat input and interpass temperature.
Q5: Can F53 be used in H₂S-containing sour gas service?
Yes, and it complies with NACE MR0175 / ISO 15156 requirements. F53's PREN exceeds 40, meeting the material corrosion resistance requirements for sour gas environments. F53 is a commonly used flange material for inlet separators, slug catchers, and similar components in sour gas processing systems.
Q6: What is the delivery condition of F53 flanges?
Delivered in the solution annealed + water quenched condition. Heat treatment temperature is ≥1025°C, water quenched to below 260°C. Material certificates should specify heat treatment temperature and cooling method, and ferrite content test reports (40–60% required) can be provided.
Q7: Are custom flange types and pressure ratings supported?
Yes. We can provide the full range of WN, SO, BL, SW, TH, and LJ flange types, with pressure classes from Class 150 to 2500, and face types of RF, FF, or RTJ. Drawing-based customization of non-standard sizes is supported.
Q8: What are the delivery lead time and minimum order quantity?
Delivery lead time and minimum order quantity are determined by specifications, quantity, and inspection requirements. Common specifications are available from stock; custom specifications typically require 15–30 working days. Please consult our sales team for details.
