EN 10088-2 X1NiCrMoCu31-27-4 1.4563 Stainless Steel Plate

EN 10088-2 X1NiCrMoCu31-27-4 1.4563 stainless steel plate is a high-alloy austenitic flat product supplied to EN 10088-2, the European standard for stainless steel sheet, plate and strip for general purposes. X1NiCrMoCu31-27-4 contains up to 0.020 % carbon, 26.0 – 28.0 % chromium, 30.0 – 32.0 % nickel, 3.0 – 4.0 % molybdenum, 0.70 – 1.50 % copper and up to 0.10 % nitrogen. It is the composition commonly called Alloy 28 (UNS N08028). EN 10088-2 places 1.4563 among its special grades, defined as grades for special use and/or with limited availability, and Table 7 lists it as hot rolled plate (P) up to 75 mm only, solution annealed. Table 7 rates it resistant to intergranular corrosion both as delivered and after sensitization.

SHH STEEL works as a steel sourcing partner with long-term relationships with Chinese stainless mills that roll high-alloy austenitic hot rolled plate. For large tonnages, the buyer can contract directly with a suitable mill, with SHH STEEL assisting for a modest service fee and handling follow-up and documents. For small orders we consolidate demand, so that 1 – 5 t lots are placed against genuine mill production instead of stock of unknown origin. Each shipment can be released after third-party inspection by TUV, ABS, BV, DNV, CCS or an agency the buyer nominates, and payment by TT or LC is accepted. The rest of this page covers the technical side of EN 10088-2 1.4563 and the steps we take so that the sheet that arrives is the sheet that was ordered.

The table below lists the concerns buyers raise most often when sourcing EN 10088-2 X1NiCrMoCu31-27-4 sheet and plate from China, and how SHH STEEL deals with each of them.

1.4563 corresponds to UNS N08028. Because of its nickel content, N08028 plate is covered by ASTM B709 (iron-nickel-chromium-molybdenum alloy plate, sheet and strip) rather than by ASTM A240. The composition is sold under trade names, including Alleima’s Sanicro 28; Sanicro is an Alleima trademark. SHH STEEL orders and certifies by EN steel number and UNS number; a specific producer’s branded product has to be named and agreed in the order. For pressure equipment the grade is ordered to EN 10028-7; see EN 10028-7 1.4563 pressure vessel plate.

EN 10088-2 is tighter on carbon, nickel, silicon, manganese and sulphur, so a 1.4563 heat normally meets N08028 chemistry if its copper is no higher than 1.40 %; dual certification therefore needs copper of 0.70 – 1.40 %. ASTM B709-22 requires a minimum yield strength of 214 MPa, a minimum tensile strength of 500 MPa and 40 % elongation, against 220 MPa, 500 – 700 MPa and 40 % in EN 10088-2, and recommends solution annealing at 1 080 °C minimum. SHH STEEL checks both sets of values when a buyer needs dual certification.

1.4563 is also listed in EN 10028-7:2016 for pressure purposes, as is 1.4539 (EN 10028-7 1.4539 pressure vessel plate). That standard may set its own test and property requirements, which we have not reproduced here.

Edition note: the values on this page are taken from EN 10088-2:2014. A revised edition (EN 10088-2:2024) has since been published. If your contract names the newer edition, SHH STEEL checks the order against that text before production, and any difference is raised at the quotation stage rather than after rolling.

The 1.4563 chemical composition below is the cast (heat) analysis from EN 10088-2:2014 Table 1. Values are percentages by mass; a single figure is a maximum.

The 1.4563 chemical composition is built on 26.0 – 28.0 % chromium and 30.0 – 32.0 % nickel, with molybdenum and copper for reducing acids. Phosphorus (0.030 %) and sulphur (0.010 %) limits are tighter than for the 300-series grades. SHH STEEL checks chromium, nickel, molybdenum and copper on every certificate as part of the 1.4563 chemical composition review.

Product analysis tolerances (EN 10088-2 Table 5)

A product analysis is a check made on the delivered sheet. It is not mandatory under EN 10088-2; it is carried out when agreed at the time of enquiry and order, and SHH STEEL can arrange it through a partner laboratory. The permissible tolerances on the cast limits are:

Where several product analyses are made on one cast, individual results may exceed the maximum or fall below the minimum, but not both for the same element. Copper uses + 0.04 % (plus only) at the 0.70 % minimum and ± 0.10 % at the 1.50 % maximum, because Table 5 changes band at 1.00 %. If a product analysis is required, it should be stated in the order together with the Table 5 tolerances.

The 1.4563 mechanical properties below are the room-temperature values from EN 10088-2:2014 Table 7 for austenitic steels in the solution annealed condition. Test pieces are transverse; the A80 elongation applies below 3 mm and the proportional elongation A from 3 mm.

Rp1.0 values are for guidance only. For bigger sizes than those listed, mechanical values are to be agreed at the time of enquiry and order.

EN 10088-2 lists 1.4563 as hot rolled plate only. Table 7 rates its resistance to intergranular corrosion (EN ISO 3651-2) as “yes” in both the delivery condition and the sensitized condition.

Cold worked condition (process route 2H)

EN 10088-2 Tables 19 and 20 list no cold worked (2H) strength levels for 1.4563, so the grade is ordered in the solution annealed condition (+AT). Where higher annealed strength is needed, the nitrogen-alloyed 1.4529 (300 MPa) is the usual comparison.

Minimum proof strength at elevated temperature (EN 10088-2 Table 12, +AT)

EN 10088-2 Table 12 gives values for 1.4563 from 100 °C to 550 °C, for the solution annealed condition (+AT), a wider range than for 1.4529 (to 400 °C). They are minimum values for design and are not tested unless agreed.

EN 10088-2 Table A.1 gives the following guideline temperatures for 1.4563:

The footnotes to Table A.1 state that with a continuous furnace the upper part of the range is usually preferred or even exceeded, and that the lower end of the range should be aimed at when the heat treatment is part of further processing, because otherwise the mechanical properties may be affected. Solution annealing may be omitted if hot working and cooling achieve the required mechanical properties and resistance to intergranular corrosion.

The Euro Inox tables give the same 1 070 – 1 150 °C range with cooling in air or water, and ASTM B709 recommends a minimum of 1 080 °C with rapid cooling for N08028. A dual-certified plate should therefore be annealed at 1 080 °C or above. Plate is delivered as +AT.

The values below are approximate reference figures for X1NiCrMoCu31-27-4 at room temperature, from the worldstainless “Tables of Technical Properties”, which follow EN 10088-1. They are suitable for design estimates and weight calculation; where a figure is critical, use EN 10088-1 itself.

The worldstainless table gives 1.4563 a density of 8.0 g/cm³, a modulus of 195 GPa, a thermal conductivity of 12 W/(m·K), a specific heat of 450 J/(kg·K) and an electrical resistivity of 1.00 Ω·mm²/m, the same thermal and electrical values as for 1.4539 and 1.4529. 1.4563 is not listed in the EN 10088-1 extract by Häuselmann that we use for magnetic behaviour, so the magnetic statement above is the general austenitic one.

The Euro Inox fabrication tables list 1.4563 for heat exchangers in contact with sulphuric and phosphoric acid contaminated by chlorides and fluorides, and for pipes in the oil and gas industry, with good resistance to pitting corrosion, crevice corrosion and stress corrosion cracking. Alleima’s Sanicro 28 datasheet describes very high corrosion resistance in strong acids and very good resistance to stress corrosion cracking and intergranular corrosion. EN 10088-2 Table 7 rates its resistance to intergranular corrosion, tested to EN ISO 3651-2, as “yes” in the delivery condition and “yes” in the sensitized condition.

The lower-nickel, lower-chromium relative is EN 10088-2 1.4539 plate; the 6 % molybdenum grades EN 10088-2 1.4529 plate and EN 10088-2 1.4547 plate are compared when chloride pitting rather than acid attack is the main risk.

Corrosion resistance depends on the actual medium, its impurities and its temperature, so service experience or tests in the real medium should guide grade selection.

1.4563 is weldable by the common arc and resistance processes; as a fully austenitic high-nickel grade, filler choice and heat input need attention.

• The Euro Inox fabrication tables rate TIG/MIG, manual metal arc and resistance welding as suitable for 1.4563.
• The filler materials listed are the nickel alloys 2.4621, 2.4653 and 2.4656, not a matching stainless filler.
• EN 10088-2 Table 7 rates 1.4563 “yes” for intergranular corrosion after sensitization.
• EN 10088-2 does not specify welding procedures; these are published guidelines and general practice.

These points reflect industry practice for high-alloy austenitic stainless steels rather than requirements of EN 10088-2, which does not specify welding procedures. In the SHH STEEL workshop, plate blanks are cut with clean, burr-free edges, ready for the fabricator’s own joint preparation.

Annealed 1.4563 plate forms with standard austenitic practice; with a proof strength of 220 MPa and 40 % elongation, it behaves much like 1.4539 of the same thickness.

Plate is cut by plasma or waterjet, or sawn. Machining needs sharp tools, rigid set-ups and positive feeds to avoid work hardening at the cut.

We run our own workshop next to the warehouse, so 1.4563 hot rolled plate and X1NiCrMoCu31-27-4 plate blanks can be delivered cut to size or bent. Details are on our steel cutting services and bending and forming services pages.

EN 10088-2 Table 7 lists 1.4563 only as hot rolled plate (P) up to 75 mm.

For bigger sizes than those listed, the mechanical values shall be agreed at the time of enquiry and order. Under section 6.9 of the standard, EN ISO 18286 applies to individually rolled quarto plate.

SHH STEEL can supply 1.4563 hot rolled plate in standard sizes or cut to your drawing, after confirming availability with the mill; sheet and strip have to be agreed separately.

Surface finish is ordered by the process route symbols of EN 10088-2 Table 6; trade names from ASTM and JIS are shown for reference. Not every route is available for every grade, and the mill confirms which ones it can supply.

EN 10088-2 Table 7 lists this grade as hot rolled plate (P) only, so the cold rolled routes 2D, 2B and 2R are not part of the standard offer and would have to be agreed separately. The No.1 cross-reference follows worldstainless and IMOA comparison tables. The Euro Inox tables give no polishability rating for 1.4563.

The 1.4563 Alloy 28 relationship is the key cross-reference: the usual 1.4563 equivalent, and the answer to most N08028 equivalent enquiries, is UNS N08028 in ASTM B709 and ASME SB-709.

N08028 is not listed in ASTM A240, so an order for “A240 N08028” should be corrected to ASTM B709 at the enquiry stage. Because EN 10088-2 is tighter than B709 on most elements, a 1.4563 heat with copper up to 1.40 % normally meets both.

1.4563 vs 1.4539 and 1.4529

On 1.4563 vs 1.4539: 1.4563 has more chromium (26.0 – 28.0 % against 19.0 – 21.0 %) and nickel (30.0 – 32.0 % against 24.0 – 26.0 %), less molybdenum (3.0 – 4.0 % against 4.0 – 5.0 %) and the same plate proof strength of 220 MPa, but EN 10088-2 lists it as plate only, while EN 10088-2 1.4539 plate is also listed as strip and sheet. Compared with EN 10088-2 1.4529 plate, it has less molybdenum and no nitrogen addition, and a lower proof strength (220 against 300 MPa).

Typical applications of 1.4563 plate listed in the Euro Inox fabrication tables include:

• Heat exchangers in contact with sulphuric acid contaminated by chlorides and fluorides
• Heat exchangers in phosphoric acid service
• Pipes and equipment in the oil and gas industry
• Process equipment where pitting, crevice corrosion and stress corrosion cracking must be avoided

For pressure equipment, 1.4563 plate is ordered to EN 10028-7; for other uses, EN 10088-2 applies.

Alleima’s Sanicro 28 datasheet lists approvals including NACE MR0175/ISO 15156 for its product; such approvals belong to the producer’s material and have to be agreed separately for a given order. SHH STEEL can advise when 1.4539 or a nickel alloy should be compared.

For 1.4563 the main risks are lower-nickel material supplied instead, copper above 1.40 % on ASTM dual-certified orders, ordering to the wrong ASTM specification, and the plate-only listing in EN 10088-2.

None of these steps is complicated, but they need to be agreed at the start. When you send an enquiry, tell us which of these points matters most to you, and the order will be built around it.

Every 1.4563 order is supported by documents and checks that make the material traceable to the heat:

• Cast analysis with chromium, nickel, molybdenum and copper checked
• Tensile test (transverse) to Table 7
• Impact test for plate over 10 mm when agreed
• Intergranular corrosion test to EN ISO 3651-2 when agreed
• Thickness, flatness and surface inspection
• Additional checks through our third-party testing service: PMI, dimensional, flatness and surface inspection

If the order does not name an inspection document, EN 10088-2 requires only a test report 2.2. Because this is rarely enough for acid plant, heat exchanger and oil and gas equipment or export work, SHH STEEL supplies an EN 10204 3.1 inspection certificate as standard and a 3.2 certificate when an independent inspector (TUV, ABS, BV, DNV, CCS or an agency you nominate) witnesses testing and countersigns the document.

Ordering example and lead time

Following the pattern of the example in EN 10088-2, a typical order line would read: 4 plates, 10 mm × 1 500 mm × 6 000 mm, EN ISO 18286, EN 10088-2, steel X1NiCrMoCu31-27-4 (1.4563), process route 1D, inspection certificate 3.1 to EN 10204. Mill production lead time is generally 30 – 40 days from order confirmation, depending on the rolling schedule, the size and the tests requested; because 1.4563 is a special grade, the campaign date should be confirmed at enquiry. Consolidated small lots follow the same mill schedule, and we send progress updates at rolling, testing and packing.

• Mill relationships: long-term cooperation with Chinese stainless mills helps us secure competitive pricing and steadier delivery for 1.4563 and related high-alloy austenitic grades.
• Direct mill contracts: for larger tonnages you can contract directly with a suitable mill, for a modest service fee, while we handle follow-up and documents.
• Order consolidation: 1 – 5 t lots are combined so they can be placed against genuine mill production.
• Own workshop: slitting, cut-to-length, laser cutting, bending and protective film before shipment.
• Inspection and certificates: third-party inspection by TUV, ABS, BV, DNV, CCS or your nominated agency, with EN 10204 3.1 or 3.2 certificates.
• Flexible payment: TT, LC or a combination of both.
• Port logistics: coil and sheet are packed seaworthy with heat-number labels and shipped through our worldwide shipping service, together with other grades if needed.

As a 1.4563 plate supplier SHH STEEL also stocks and sources the wider range of stainless steel sheets and plates, so mixed orders of different stainless grades can travel in one container with one set of paperwork.

EN 10088-2 X1NiCrMoCu31-27-4 1.4563 is the 31Ni-27Cr-3.5Mo-Cu high-alloy austenitic special grade of the Alloy 28 type, supplied as hot rolled plate up to 75 mm for acid plant, heat exchanger and oil and gas equipment. Choosing it is the easy part. Getting genuine material that matches the certificate, in the gauge and finish your parts need and on a predictable schedule, is where a sourcing partner earns its place, and that is the work SHH STEEL does every day through long-term mill cooperation, consolidation and its own workshop.

The next step is simple. Send SHH STEEL your drawing, or an enquiry with the quantity, thickness, width, finish and delivery destination, and we will judge whether a direct mill contract or consolidation with processing fits your order better, and quote accordingly. Send your sizes and quantities for a quotation.