Sanicro 28 Buttweld and Forged Fittings for Phosphoric and Sulphuric Acid Service
Sanicro 28 pipe fittings are made from UNS N08028 / EN 1.4563, a 27Cr-31Ni-3.5Mo-Cu austenitic alloy. Buttweld fittings are supplied to ASTM A403 with chemistry and properties per ASTM B668 and ASME B16.9 dimensions; socket weld and threaded fittings are forged or machined from 1.4563 bar to ASME B16.11.
Dinesh Tube India supplies Sanicro 28 elbows, tees, reducers, caps, crosses, stub ends and pipe bends from Mumbai, with EN 10204 3.1 certificates and third-party inspection on request.
What Is Sanicro 28 and Why Is It Used?
Sanicro 28 is a high-alloy, extra-low-carbon austenitic stainless alloy with about 27% chromium, 31% nickel, 3.5% molybdenum and 1% copper. It was developed for wet-process phosphoric acid plants, especially heat exchangers in the concentration unit, and is used for sulphuric acid, acids contaminated with chlorides or fluorides, formic and acetic acid, and chloride-bearing cooling water. It resists pitting, crevice corrosion, stress corrosion cracking and intergranular corrosion.
- In the ASTM A262 Practice C (Huey) test in boiling 65% nitric acid, corrosion rates below 0.15 mm/year (6 mpy) are reported.
- In ASTM G48 Method B crevice tests (6% ferric chloride) it performs better than Alloy 825.
- It is more resistant than AISI 316, 317L and 904L in formic acid and in acetic acid contaminated with formic acid.
Which Material Specification Applies to Sanicro 28 Fittings?
Mating pipe is ASTM B668 / EN 10216-5 seamless; see our Sanicro 28 pipes.
Buttweld or Forged Fittings: Which Do You Need?
Which Fitting Types and Dimension Standards Are Available?
Sanicro 28 Buttweld Elbow
Sanicro 28 Buttweld Tee
Sanicro 28 Reducer
Sanicro 28 Buttweld Cross
Sanicro 28 Stub End
Sanicro 28 Pipe Bend
Sizes, Schedules and End Preparation
Which Tests and Certification Apply?
Chemical Composition of Sanicro 28 (%)
Iron is the balance. ASTM B668 limits for UNS N08028 differ slightly; check the standard named in your order.
Mechanical Properties of Sanicro 28 Fittings
Solution-annealed condition. Actual values are reported on the test certificate. Density about 8.0 g/cm³.
Sanicro 28 Equivalent Grades
Equivalents describe the same alloy, but each standard has its own limits; name the standard you need on the order. Sanicro® is a trademark of Alleima. Dinesh Tube India is an independent supplier and is not affiliated with the trademark owner.
Sanicro 28 Pipe Fittings Specification
Buttweld
Forged
Dimensions
Size
Schedule
Pipe Bends
Condition
Certification
How to Order Sanicro 28 Fittings: RFQ Example
A complete enquiry lets us quote in one round. Replace the values with your own.
Send your Sanicro 28 fittings RFQ in this format to kamlesh@dineshtube-india.com, call or WhatsApp +91 83559 10913, or send an enquiry.
Where Are Sanicro 28 Fittings Used?
Other Sanicro 28 products: flanges, pipes, tubes and sheets and plates.
Sanicro 28 Pipe Fittings: FAQs
Which ASTM specification covers Sanicro 28 buttweld fittings?
UNS N08028 is not one of the standard ASTM A403 WP grades. The mill (Alleima) lists Sanicro 28 fittings as made to ASTM A403 with chemical composition and mechanical properties according to ASTM B668, the seamless pipe specification for N08028. State this on the order, together with the dimension standard (ASME B16.9 or MSS SP-43).
How are Sanicro 28 forged fittings specified?
Socket weld and threaded fittings to ASME B16.11 are forged or machined from Sanicro 28 bar to EN 10088-3 / EN 10272 grade 1.4563, or made to the purchaser’s material specification. ASTM A182 and B462 do not cover UNS N08028.
What is the equivalent of Sanicro 28?
Sanicro 28 is UNS N08028, EN 1.4563 (X1NiCrMoCu31-27-4), Swedish SS 2584 and AFNOR Z1NCDU31-27-03, often called Alloy 28. Each standard has its own limits, so name the standard you need on the order.
What is the difference between Sanicro 28 and 904L fittings?
Sanicro 28 has more chromium (about 27% against 20%) and nickel (31% against 25%) than 904L (UNS N08904). It performs better in wet-process phosphoric acid, chloride-contaminated sulphuric acid and formic acid. They are different grades and are not interchangeable without approval.
Up to what temperature can Sanicro 28 fittings be used?
Prolonged exposure above about 600 °C (1110 °F) can cause embrittlement from intermetallic phases. Under the ASME Boiler and Pressure Vessel Code the grade is listed up to 316 °C (600 °F) for Section III and 455 °C (850 °F) for Section I (Code Case 1325) and Section VIII Division 1. Your designer confirms the limit for the code used.
Which filler metal is used to weld Sanicro 28 fittings?
TIG (GTAW) is the preferred method. The matching filler is Sanicro 28 / AWS A5.9 ER383 wire, or E383 covered electrodes. Follow your qualified welding procedure.
What should a Sanicro 28 fittings enquiry include?
Give the material (UNS N08028 / EN 1.4563 and the material basis, for example ASTM A403 with B668 properties), fitting type, size, schedule or class, dimension standard, quantity, tests (PMI, ASTM A262 Practice C if required), documents (EN 10204 3.1, 3.2 or third-party inspection) and the delivery date.
Export Destinations for Sanicro 28 Pipe Fittings
We supply Sanicro 28 pipe fittings from Mumbai within India and export to fabricators, EPC contractors and plants in the Middle East, Africa, Asia, Europe and the Americas. Tell us your destination port when you enquire.