Sanicro 28 Sheets & Plates | Alloy 28 N08028 ASTM B709

Sanicro 28 (Alloy 28, UNS N08028) Sheets and Plates to ASTM B709

Dinesh Tube India supplies and exports Sanicro 28 sheets and plates from Mumbai for phosphoric acid, sulphuric acid and chloride-bearing process equipment. The alloy is known generically as Alloy 28 (UNS N08028, Werkstoff 1.4563). We supply sheet and plate to ASTM B709 / ASME SB709 and EN 10088-2, hot or cold rolled, solution annealed, cut to size, with EN 10204 3.1 mill test certificates.

Alloy 28 is a high-alloy austenitic stainless steel with about 27% chromium, 31% nickel, 3.5% molybdenum and 1% copper. Plate is used for vessel shells, heads, tubesheets, linings and scrubber parts where the same acids and chloride waters that call for Sanicro 28 tubes attack the rest of the equipment. For the full product range, see Sanicro 28 products.

Sanicro® is a registered trademark of Alleima AB. Dinesh Tube India is an independent supplier; sheets and plates are supplied to UNS N08028 / 1.4563 from approved mills, with the producing mill shown on the certificate.

Table of Contents

Specification & Sizes
Equivalent Grades
Chemical Composition
Mechanical Properties
Sanicro 28 vs 904L vs Alloy 825 vs 254 SMO
Sheet & Plate Weight
Where Sanicro 28 Plate Is Used
Applications
FAQs

Sanicro 28 (Alloy 28, UNS N08028) sheets and plates to ASTM B709

Sanicro 28 Equivalent Grades

Designation	Equivalent
Generic name	Alloy 28
UNS	N08028
EN / Werkstoff Nr.	1.4563
EN name	X1NiCrMoCu31-27-4
AFNOR	Z1NCDU31-27-03
SS (Sweden)	2584
Sheet / plate standards	ASTM B709 / ASME SB709; EN 10088-2; EN 10028-7
Tube / pipe standard	ASTM B668 / ASME SB668

There is no exact AISI or JIS equivalent. The closest common alternatives are 904L (lower nickel and chromium) and Alloy 825 (higher nickel, lower chromium); see the comparison below.

Sanicro 28 Sheet & Plate Chemical Composition (UNS N08028, %)

Element	UNS N08028 limits	Typical (nominal)
Chromium (Cr)	26.0–28.0	27
Nickel (Ni)	30.0–34.0	31
Molybdenum (Mo)	3.0–4.0	3.5
Copper (Cu)	0.6–1.4	1.0
Carbon (C), max	0.030	≤0.020
Manganese (Mn), max	2.50	≤2.0
Silicon (Si), max	1.00	≤0.7
Phosphorus (P), max	0.030	≤0.020
Sulphur (S), max	0.030	≤0.010
Iron (Fe)	Balance	Balance

Sanicro 28 Plate Mechanical Properties (ASTM B709, Minimum)

Tensile Strength	Yield Strength (0.2%)	Elongation	Density
500 MPa (73 ksi)	214 MPa (31 ksi)	40%	8.0 g/cm³

Values for the solution-annealed condition. Check the current ASTM B709 edition (B709-22 or later) and the mill certificate for governing values.

Sanicro 28 vs 904L vs Alloy 825 vs 254 SMO

Point	904L (N08904)	Alloy 825 (N08825)	254 SMO (S31254)	Sanicro 28 (N08028)
Cr / Ni / Mo (nominal %)	20 / 25 / 4.5	21 / 42 / 3	20 / 18 / 6.1	27 / 31 / 3.5
PRE (approx.)	35	32	43	39
Phosphoric acid (wet process)	Good	Good	Good	Excellent
Sulphuric acid	Very good	Very good	Good	Very good
Seawater pitting / crevice	Fair	Fair	Excellent	Very good
Chloride stress corrosion cracking	Good	Excellent	Good	Excellent

Sanicro 28 plate is usually chosen over 904L where the acid also carries chlorides and fluorides, as in wet-process phosphoric acid. For seawater alone, a 6Mo grade such as 254 SMO plate is often the better choice.

Sanicro 28 Sheet & Plate Weight

Thickness	kg per m²	2000 × 1000 mm sheet (kg)	2500 × 1250 mm sheet (kg)
1 mm	8.0	16.0	25.0
2 mm	16.0	32.0	50.0
3 mm	24.0	48.0	75.0
5 mm	40.0	80.0	125.0
6 mm	48.0	96.0	150.0
10 mm	80.0	160.0	250.0
12 mm	96.0	192.0	300.0
20 mm	160.0	320.0	500.0

Weight (kg) = length (m) × width (m) × thickness (mm) × 8.0, using density 8.0 g/cm³. Other sizes on request.

Where Sanicro 28 Plate Is Used

Phosphoric acid plants: evaporator bodies, attack tanks, agitators and filter parts in wet-process phosphoric acid containing chlorides and fluorides.
Sulphuric acid equipment: vessels, coolers and piping components, helped by the copper content.
Tubesheets: to match Sanicro 28 tubes, so the tube-to-tubesheet joint is not the weak point. Clad plate (N08028 on carbon steel) can lower the cost of thick tubesheets.
Scrubbers and off-gas systems: fluoride-bearing gas cleaning and gypsum recovery.
Limits: not intended for hot concentrated hydrochloric acid or strongly oxidising acid mixtures; for those, check Hastelloy plate.

Sanicro 28 Product Range

Sanicro 28 Tubes

Seamless N08028 heat-exchanger and evaporator tubes to ASTM B668.

Sanicro 28 Pipes

Seamless N08028 pipe by NPS and schedule to ASTM B668.

Sanicro 28 Flanges

Weld neck, slip-on and blind flanges in UNS N08028.

Need Sanicro 28 / Alloy 28 sheets or plates? Send the thickness, width, length or cut sizes, quantity and process media to kamlesh@dineshtube-india.com or call +91 83559 10913. You can also send an enquiry.

Fabrication and Testing

Welding: GTAW, GMAW or SMAW with an over-alloyed nickel-base filler (for example ERNiCrMo-3) or matching filler, low heat input and interpass temperature control; no post-weld heat treatment is normally needed.
Forming: forms well cold, like other high-alloy austenitic grades; heavy cold forming may need a solution anneal afterwards.
Testing: plates are tested to ASTM B709, with PMI, ultrasonic testing and intergranular corrosion testing on request.

Sanicro 28 Sheet & Plate Applications

Phosphoric acid evaporators, attack tanks and agitators
Sulphuric acid vessels and coolers
Heat-exchanger tubesheets and channels
Fluoride off-gas scrubbers and gypsum recovery
Seawater and cooling-water equipment
Fertiliser and chemical process linings

Phosphoric acid, sulphuric acid and process-vessel uses of Sanicro 28 plates

Sanicro 28 Sheets & Plates: FAQs

What is Sanicro 28?

Sanicro 28 is Alleima's trade name for Alloy 28 (UNS N08028, Werkstoff 1.4563), a high-alloy austenitic stainless steel with about 27% chromium, 31% nickel, 3.5% molybdenum and 1% copper.

What is the equivalent of Sanicro 28 plate?

The equivalents are Alloy 28, UNS N08028, Werkstoff 1.4563 and EN X1NiCrMoCu31-27-4. Sheet and plate are made to ASTM B709 / ASME SB709 and EN 10088-2 (EN 10028-7 for pressure equipment).

What is the chemical composition of Sanicro 28?

For UNS N08028: chromium 26.0–28.0%, nickel 30.0–34.0%, molybdenum 3.0–4.0%, copper 0.6–1.4%, carbon 0.030% max, manganese 2.50% max, silicon 1.00% max, balance iron.

Which standard covers Sanicro 28 sheets and plates?

ASTM B709 (ASME SB709) covers UNS N08028 plate, sheet and strip. In Europe, EN 10088-2 covers 1.4563 flat products, and EN 10028-7 covers them for pressure purposes.

What thicknesses are available in Sanicro 28 plate?

Typically cold-rolled sheet from about 0.5 to 6 mm and hot-rolled plate from about 5 to 50 mm, up to about 2000 mm wide, supplied full size or cut to drawing.

How do I calculate the weight of a Sanicro 28 plate?

Weight in kg = length (m) × width (m) × thickness (mm) × 8.0. For example, a 2000 × 1000 × 10 mm plate weighs about 160 kg.

What is the price of Sanicro 28 plate?

The price depends on thickness, size, quantity, cutting and certification, and on nickel and molybdenum prices at the time of order. Send your requirement to kamlesh@dineshtube-india.com or call +91 83559 10913 for a current quote.

Export Destinations for Sanicro 28 Sheets & Plates

We supply Sanicro 28 (Alloy 28) sheets and plates across India to fertiliser, phosphoric acid, sulphuric acid and equipment-fabrication projects in Gujarat, Maharashtra, Tamil Nadu, Andhra Pradesh and Odisha, and export to the Middle East (Saudi Arabia, UAE, Qatar, Oman, Kuwait, Jordan), Africa (Morocco, Tunisia, Egypt, South Africa), Asia (Japan, South Korea, Singapore, Malaysia, Indonesia, Vietnam) and Europe on request.

Sanicro 28 (Alloy 28) Sheets & Plates