Tesco Steel & Engineering forges ASTM A182 F60 slip on flanges — duplex 2205 to the tightened UNS S32205 designation, whose chromium, molybdenum and nitrogen minimums sit in the upper half of S31803's ranges, guaranteeing the corrosion performance a lean heat might miss — to ASME B16.5 Class 150–2500 from ½″ to 24″ NB, larger patterns to order. The modern face of the 2205 workhorse: roughly twice the yield of 316L plus chloride pitting and SCC resistance for offshore, seawater and brine duty. Supplied solution annealed, commonly dual-certified S31803/S32205 alongside F51, faced SORF, with super duplex F53/F55 from the same forge. NACE MR0175 on request; every lot with EN 10204 3.1/3.2 MTC. ISO 9001:2015, made in Mumbai, India — exported to 50+ countries.
ASTM A182 F60 · SA182 · S32205Duplex 2205 · 1.4462 · PREN ≈ 35ASME B16.5 Class 150–2500½″ – 24″ NB · SORF655 MPa TS / 450 MPa YS minNACE MR0175 / ISO 15156EN 10204 3.1 / 3.2 · ISO 9001:2015
ASTM A182 F60 Duplex Steel Slip On Flange — Raised Face (SORF)
What is an ASTM A182 F60 Slip On Flange?
F60 = 2205 with the good half guaranteed.ASTM A182 F60 (UNS S32205) is duplex 2205 with the chromium, molybdenum and nitrogen floors raised into the upper half of S31803's ranges — the corrosion-critical chemistry locked in by specification, PREN ≈ 35, tensile floor lifted to 655 MPa. Same half-austenite, half-ferrite structure, same ~2.5× the yield of 316L, same chloride SCC resistance. As a slip-on, it installs with two fillet welds, ER2209 filler, no preheat, no PWHT.
Also searched as: S32205 slip on flange, duplex 2205 slip on flange, F60 SORF flange, SA182 F60 slip on flange, dual certified S31803/S32205 flange, 1.4462 slip on flange — all refer to the product on this page.
Super duplex with Cu+W — severe seawater & sour duty
PREN (Pitting Resistance Equivalent Number = %Cr + 3.3×%Mo + 16×%N) ranks chloride pitting resistance. F51 and F60 are the same 2205 alloy — F60 simply guarantees the upper-range chemistry, which is why most modern heats certify to both.
ASTM A182 F60 (UNS S32205) Chemical Composition
C
Mn
Si
P
S
Cr
Ni
Mo
N
Fe
0.030 max
2.00 max
1.00 max
0.030 max
0.020 max
22.0-23.0
4.5-6.5
3.0-3.5
0.14-0.20
Bal
Values in weight % per ASTM A182 for UNS S32205. Against S31803 the chromium (22.0 vs 21.0), molybdenum (3.0 vs 2.5) and nitrogen (0.14 vs 0.08) floors are raised — precisely the elements that set the pitting resistance and weld-zone behaviour. The rest of the 2205 recipe is unchanged.
ASTM A182 F60 Mechanical Properties
Tensile Strength, MPa (ksi)
Yield Strength, Min, MPa (ksi)
Elongation % min (2")
Hardness, HB max
655 (95) min
450 (65) min
25
290
The guaranteed upper-range nitrogen lifts the tensile floor to 655 MPa — above S31803's 620 — while the 450 MPa yield remains roughly 2.5× that of 316L. Supplied solution annealed; values demonstrated per heat on the EN 10204 certificate, hardness verified for NACE lots.
A182 F60 Slip On Flange Specifications
ASTM A182 F60 Slip On Flanges are available in the following specifications:
1/2"NB to 24"NB per ASME B16.5; larger patterns and EN 1092-1 duplex flanges to order
Class
150#, 300#, 400#, 600#, 900#, 1500#, 2500#
Facing
Raised Face (SORF) — default; Flat Face or RTJ where the piping class specifies
Heat Treatment
Solution annealed per ASTM A182, thermal record retained
Service
Chloride, seawater, brine & sour duty — typically -50 °C to +250 °C per project specifications
Installation
Two fillet welds (hub + bore), pipe set back 1/8"; ER2209 filler, controlled heat input, no preheat, no PWHT
Sour Service
NACE MR0175 / ISO 15156 listed material — supplied with hardness verification within the standard's limits
Certification
EN 10204 3.1 (standard) / 3.2 witnessed
Equivalent Grades of ASTM A182 F60
Standard
ASME
UNS
Werkstoff Nr.
EN
Common Name
ASTM A182 F60
SA182 F60
S32205
1.4462
X2CrNiMoN22-5-3
Duplex 2205
The European 1.4462 covers both S31803 and S32205 — Europe never split the designations, which is why dual certification comes naturally. System partners: ASTM A790 duplex pipe and A815 fittings in the same UNS number. Certificates always state every designation the heat satisfies.
Why A182 F60 Slip Ons Are Specified
The Good Half of 2205, Guaranteed
Upper-range Cr, Mo and N locked in by specification — the corrosion performance a lean S31803 heat might miss is contractual, not hoped for.
Welds More Predictably
The guaranteed 0.14% nitrogen floor speeds austenite reformation in the weld zone — one of the main reasons projects moved to S32205.
2.5× the Yield of 316L
450 MPa minimum yield — thinner walls and lighter flanges for the same pressure, with the tensile floor raised to 655 MPa.
Dual-Certified Flexibility
Most modern heats satisfy both S31803 and S32205 — one flange serves specifications written in either era.
Know the Handoffs
Hot seawater and the harshest offshore duty: super duplex F53/F55 (PREN ≥ 40). Mild indoor duty: 316L stays cheaper. Critical RT-mandated lines: F60 weld necks.
How Our A182 F60 Slip On Flanges Are Manufactured
1
Forging — cut billet of certified A182 F60 heat is hot-forged into the flange blank, keeping full heat traceability from raw material to despatch.
2
Solution annealing — heated and quenched per ASTM A182 to restore the balanced ~50/50 austenite-ferrite structure and dissolve any deleterious phases; furnace record retained.
3
Machining — hub, faces and bolt holes to ASME B16.5; the bore machined slightly over pipe OD per the slip-on tolerance.
4
Facing & finish — SORF raised face with serrated stock finish, flat face or RTJ groove; pickled and passivated on request.
5
Testing & marking — mechanical, chemical and hardness verification against the heat (corrosion and ferrite testing where the order specifies), then permanent marking — dual F51/F60 where the heat qualifies — with size, class and heat number.
6
Certification & packing — EN 10204 3.1 MTC (3.2 witnessed on request), export-packed as pictured on this page.
Where A182 F60 Slip On Flanges Are Used
Wherever modern specifications call 2205: offshore oil and gas process and produced-water systems, seawater cooling lines, desalination plants, chemical tankers, brine and chlor-alkali service, flue-gas desulfurization, pulp and paper, and coastal plants where 316L keeps failing — with S32205 named on most post-2000 piping classes. Our duplex production and packing below:
F51/F60 Duplex Blind Flange — 4″ Class 150, Dual-MarkedF51/F60 Duplex Spade Blank — 3″ Class 300 RFF51/F60 Duplex Slip On SORF — 4″ Class 150, Dual-Marked
A182 F60 Slip On Flange Dimensions
F60 slip-on dimensions follow the ASME B16.5 slip-on tables — identical for every material. Full charts by class:
Example: “Slip On Flange, 4″ NB, ASME B16.5 Class 150, RF, ASTM A182 F60 (S32205), EN 10204 3.1 — 30 pcs.” Quotations normally within 24 hours with price, unit weight and delivery.
ASTM A182 F60 Slip On Flanges — Frequently Asked Questions
What is an ASTM A182 F60 slip on flange?
It is a slip-on flange forged from ASTM A182 F60 — duplex 2205 to the tightened UNS S32205 designation — dimensioned to ASME B16.5. The flange slides over the pipe end and is secured with two fillet welds, and the 22Cr-5Ni-3Mo-N duplex chemistry delivers roughly twice the yield strength of 316L with resistance to chloride pitting and stress-corrosion cracking. F60 is the modern specification face of the 2205 workhorse used across offshore, seawater and brine service.
What is the difference between F60 (S32205) and F51 (S31803)?
They are the same 2205 alloy — S32205 is the tightened version. Its chromium (22.0-23.0%), molybdenum (3.0-3.5%) and nitrogen (0.14-0.20%) minimums sit in the upper half of S31803's wider ranges, guaranteeing the corrosion performance and strength that a lean S31803 heat might miss. That also lifts the tensile minimum from 620 to 655 MPa. Most modern duplex heats are dual-certified to both designations, so F51/F60 flanges commonly carry both on the certificate.
Why did specifications move from S31803 to S32205?
Because S31803's ranges proved too generous. Heats melted at the lean end — 21% chromium, 2.5% molybdenum, 0.08% nitrogen — passed the specification yet underperformed in corrosion testing and welded less predictably, with the low nitrogen slowing austenite reformation in the weld zone. S32205 was introduced to lock in the upper-range chemistry that experience showed the applications actually need. New projects typically specify S32205 or dual certification; we supply accordingly.
What is the chemical composition of ASTM A182 F60?
Per ASTM A182 for UNS S32205: carbon 0.030% max, manganese 2.00% max, silicon 1.00% max, phosphorus 0.030% max, sulphur 0.020% max, chromium 22.0-23.0%, nickel 4.5-6.5%, molybdenum 3.0-3.5% and nitrogen 0.14-0.20%. Against S31803 the chromium, molybdenum and nitrogen floors are raised — the elements that set pitting resistance (PREN about 35) — while the rest of the recipe is unchanged.
What are the mechanical properties of A182 F60 slip on flanges?
Per ASTM A182: tensile strength 655 MPa (95 ksi) minimum, yield strength 450 MPa (65 ksi) minimum, elongation 25% minimum in 2", and hardness 290 HB maximum. The guaranteed upper-range nitrogen lifts the tensile floor above S31803's 620 MPa, and the 450 MPa yield is roughly 2.5 times 316L's — the property that lets duplex systems run thinner walls and lighter flanges. Values are demonstrated per heat on the EN 10204 certificate.
What is duplex stainless steel?
A stainless steel solidified as roughly half austenite, half ferrite — hence 'duplex'. The two-phase structure combines the best of both families: the ferrite contributes high strength and resistance to chloride stress-corrosion cracking, the austenite contributes toughness and weldability, and the nitrogen-boosted chemistry resists pitting. The balance is set in the mill by chemistry and solution annealing, which is why heat input during welding must be controlled to preserve it.
When is F60 duplex chosen over 316L stainless steel?
When chlorides threaten or strength pays. 316L pits in warm chloride water and cracks by chloride stress corrosion above about 60 °C; F60's higher chromium, molybdenum and nitrogen resist the pitting and its duplex structure resists the cracking. Add 2.5 times the yield strength — thinner, lighter components — and F60 is the standard upgrade for seawater, brine, produced water and coastal plants where 316L keeps failing.
What is the difference between duplex F60 and super duplex F53/F55?
Pitting resistance. F60 (2205) carries a PREN around 35 — ample for brine, produced water and most chloride process duty. Super duplex F53 (S32750) and F55 (S32760) push chromium, molybdenum and nitrogen to a PREN of 40 or more, plus roughly 550 MPa yield — the grades for hot seawater, firewater ring mains and the harshest offshore service. Where 2205 survives, it is the more economical choice; the water chemistry and temperature decide.
What temperature range can F60 duplex slip on flanges handle?
Roughly -50 °C to +250 °C in common specification practice — deliberately narrower than austenitic stainless. Above about 300 °C the ferrite phase embrittles (the '475 °C embrittlement'), and extended exposure near 700-900 °C precipitates sigma phase, so codes and project specs cap duplex service temperature. At the cold end, toughness is impact-verified rather than assumed. Inside that window, duplex is hard to beat for chloride duty.
How is an A182 F60 slip on flange welded to pipe?
With two fillet welds — hub outside, bore inside, pipe set back 1/8" (3 mm) — using over-alloyed ER2209 filler and controlled heat input, typically 0.5-2.5 kJ/mm with interpass below about 150 °C. S32205's guaranteed nitrogen is an advantage here: austenite reforms more reliably in the weld zone than in lean S31803 heats. No preheat and no PWHT are used — post-weld heat treatment other than full solution annealing harms duplex rather than helping it.
What is the equivalent of ASTM A182 F60 in other standards?
ASME SA182 F60 is the boiler-code twin; UNS S32205 the designation; and the European equivalent is the same X2CrNiMoN22-5-3 (Werkstoff 1.4462) that covers S31803 — Europe never split the two, which is why dual certification is so natural. System partners: ASTM A790 duplex pipe and A815 fittings in the same UNS number. Certificates always state the actual designations the heat satisfies.
Is A182 F60 suitable for sour service under NACE MR0175?
Yes — duplex 2205 is a listed material in NACE MR0175 / ISO 15156, widely used for produced water and wet sour hydrocarbon systems, subject to the standard's grade-specific limits on hardness, H2S partial pressure, chloride level and temperature. Solution-annealed forgings with verified hardness fit naturally within those limits. State the NACE requirement and the service conditions on the enquiry, and the flanges ship documented accordingly.
What sizes and classes are A182 F60 slip on flanges available in?
From ½" to 24" NB per ASME B16.5 in Classes 150 through 2500, with larger patterns and DIN/EN 1092-1 duplex flanges forged to order. Duplex is project material with volatile alloy pricing, so flanges are typically forged against the order — standard sizes normally dispatch within a few weeks with EN 10204 3.1 certification, dual-marked S31803/S32205 where the heat qualifies. State the required delivery on the enquiry and we confirm the schedule with the quotation.
What details are needed to get an accurate A182 F60 slip on flange quotation?
Five elements plus commercial terms: (1) size and standard — e.g. 4" NB ASME B16.5; (2) pressure class — 150 through 2500; (3) facing — SORF (raised face) default, flat face or RTJ where specified; (4) grade — ASTM A182 F60 (S32205) or dual-certified S31803/S32205, NACE MR0175 where sour; (5) certification — EN 10204 3.1 or 3.2. No pipe schedule is needed for the slip-on bore. Add the quantity and destination and we return price, weight and delivery.
Who manufactures ASTM A182 F60 slip on flanges in India?
Tesco Steel & Engineering is an ISO 9001:2015 certified flange manufacturer based in Mumbai, India, forging ASTM A182 F60 duplex 2205 slip on flanges from ½" to 24" NB per ASME B16.5 — alongside F51 and the super duplex grades F53 and F55 — in solution-annealed condition with full heat traceability and EN 10204 3.1/3.2 certification on every lot. Flanges are marked with grade, size, class and heat number and export to more than 50 countries.
