Gangsteel supplies EN 10028-3 P275NH steel plate for boilers, pressure vessels and other pressure equipment that specify this weldable fine-grain steel in the normalized condition. P275NH (steel number 1.0487) is the elevated temperature quality in the P275 strength class of EN 10028-3, together with EN 10028-3 P275NL1, EN 10028-3 P275NL2. EN 10028-3:2017 Table 1 does not include a P275N grade, and Gangsteel has no P275N product page. The usual delivery condition is normalized (+N); normalizing may be replaced by normalizing rolling. This is not the thermomechanical condition of EN 10028-5 and not the quenched and tempered condition of EN 10028-6. Within the pressure-vessel and boiler steel plate range, Gangsteel coordinates mill production, plate processing and export supply around the contractual edition and the requirements of each order.
This page is a full-site official-style product-body remediation under the existing parent category pressure-vessel and boiler steel plate. It is not part of the named official-product-standards hubs, and no child EN 10028-3 taxonomy is created. The current published edition is EN 10028-3:2017 (BS EN 10028-3:2017, 31 August 2017; approved by CEN on 7 May 2017), which supersedes EN 10028-3:2009. The general requirements of EN 10028-1:2017 also apply. Cast-analysis chemistry, product-analysis tolerances and optional carbon-equivalent values are taken from the official EN 10028-3:2017 Table 1, Table 2 and Table 3 (complete tables obtained from the SIST EN 10028-3:2017 preview). Delivery-condition wording, quality designations and ordering options follow the same 2017 official text. Room-temperature tensile properties (Table 4), elevated-temperature 0,2 % proof strength (Table 5) and impact energy (Table 6) are the official EN 10028-3:2003 Table 4, Table 5 and Table 6 values for the specified thickness, temperature and orientation bands, visually confirmed on the official British Standard pages. BSI’s published summary of the 2017 revision states that the option to agree thicknesses greater than those stated, and the corresponding footnotes in Tables 4 and 5, were deleted; that chemical analysis and mechanical properties for P460 above 100 mm were defined; that P420NH, P420NL1 and P420NL2 were included; that normalizing rolling was extended to all grades; that a new option 13 for limited copper and tin contents was defined; and that weldability guidance was moved to Annex B. It does not list a revision of the tabulated property values already specified in the 2003 bands. Official 2017 Table 4, Table 5 and Table 6 pages were not obtained in this pass; ArcelorMittal’s industry catalogue citing EN 10028-3:2017 matches the t ≤ 16 mm Table 5 rows for P275NH and P355NH and the corresponding thin-band Table 4 and Table 6 figures. P460 properties above 100 mm, which 2017 defined, are therefore not tabulated here and are not offered as values that may be agreed. P275N and P460N are not in EN 10028-3:2017 Table 1 and have no Gangsteel product pages; they are not invented. P420NH, P420NL1 and P420NL2 are in 2017 Table 1 but have no existing Gangsteel product pages and are not invented. EN 10028-2 P265GH is an existing EN 10028-2 product page (category 1) linked where relevant; it is not redrafted in this batch. EN 10028-5 and EN 10028-6 product pages that already exist are linked as related family pages only and are not drafted here. No figure from ASTM, ASME, DIN, EN 10028-2, EN 10028-5 or EN 10028-6 is presented as an EN 10028-3 requirement. The contractual edition named on the purchase order, the mill certificate and EN 10028-1 govern.
Grade Designation
- EN 10028-3 — Flat products made of steels for pressure purposes, Part 3: Weldable fine grain steels, normalized.
- P275NH — steel name in EN 10028-3:2017 Table 1; steel number 1.0487. P denotes a steel for pressure purposes; 275 is the specified minimum yield strength in MPa at t ≤ 16 mm; N denotes the normalized (or normalizing-rolled) condition; H marks the elevated-temperature quality.
- Quality — elevated temperature quality (EN 10028-3:2017 clause 6.1.1 (b)). The four qualities in this part are room-temperature (P…N), elevated-temperature (P…NH), low-temperature (P…NL1) and special low-temperature (P…NL2).
- Classification — alloy quality steel in accordance with EN 10020, under EN 10028-3:2017 clause 6.1.2: “The grades P275NH to P355NL2 are alloy quality steels, the grades P275NL2 and the grades P420NH to P460NL2 are alloy special steels.” The 2009 edition classified several of these grades as non-alloy; the 2017 wording is used here.
- Fine grain — ferritic grain size 6 or finer when tested in accordance with EN ISO 643 (EN 10028-3, Note 1 to clause 1).
- Usual delivery condition — +N (normalized). Normalizing may be replaced by normalizing rolling for all grades (clause 8.2.2).
Key Advantages of EN 10028-3 P275NH Steel Plate
- Weldable fine-grain steel for pressure equipment, supplied in the normalized condition, with normalizing rolling permitted for P275NH.
- Thickness-dependent room-temperature yield, tensile and elongation minima in Table 4, shared by the N, NH, NL1 and NL2 qualities of the P275 class, through the tabulated maximum shown on this page.
- Specified Charpy impact energy in Table 6 for the elevated temperature quality, with basic verification in the transverse direction and a design impact temperature of −20 °C.
- Specified elevated-temperature 0,2 % proof strength (Rp0,2) in Table 5 for P275NH, by thickness and temperature through 400 °C in the tabulated bands.
- Optional carbon-equivalent control (IIW formula) may be agreed (Table 3 / clause 8.3.3); it is not an automatic basic requirement.
Chemical Composition of EN 10028-3 P275NH Steel Plate
| Element | Cast (heat) analysis, mass % |
|---|---|
| C | ≤ 0.16 |
| Si | ≤ 0.40 |
| Mn | 0.80 to 1.50 |
| P | ≤ 0.025 |
| S | ≤ 0.010 |
| Al total | ≥ 0.020 |
| N | ≤ 0.012 |
| Cr | ≤ 0.30 |
| Cu | ≤ 0.30 |
| Mo | ≤ 0.08 |
| Nb | ≤ 0.05 |
| Ni | ≤ 0.50 |
| Ti | ≤ 0.03 |
| V | ≤ 0.05 |
| Nb + Ti + V | ≤ 0.05 |
Figures are EN 10028-3:2017 Table 1 cast (heat) analysis limits for P275NH. Product-analysis tolerances are specified in Table 2 and must not be applied as heat-analysis limits. Within this strength class the N and NH grades share the same chemistry; NL1 tightens sulphur (≤ 0.008 %); NL2 tightens phosphorus (≤ 0.020 %) and sulphur (≤ 0.005 %). A maximum carbon equivalent CEV = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15 may be agreed (Table 3 / clause 8.3.3), and is not an automatic requirement: t ≤ 60: 0.40 %, 60 < t ≤ 100: 0.40 %, 100 < t ≤ 250: 0.42 %.
For product thicknesses below 6 mm, a minimum manganese content of 0.60 % is permitted (Table 1 footnote b). The aluminium minimum may fall short when niobium, titanium or vanadium is used to bind nitrogen (footnote c). If aluminium alone is used, Al/N ≥ 2 (footnote d). The sum of chromium, copper and molybdenum shall not exceed 0.45 % (footnote e). A lower copper content and/or Cu + 6Sn ≤ 0.33 % may be agreed (2017 option 13 / Table 1 footnote g).
Mechanical Properties of EN 10028-3 P275NH Steel Plate
| Usual delivery condition | Product thickness t (mm) | Yield strength ReH min (MPa) | Tensile strength Rm (MPa) | Elongation A min (%) |
|---|---|---|---|---|
| +N | t ≤ 16 | 275 | 390–510 | 24 |
| +N | 16 < t ≤ 40 | 265 | 390–510 | 24 |
| +N | 40 < t ≤ 60 | 255 | 390–510 | 24 |
| +N | 60 < t ≤ 100 | 235 | 370–490 | 23 |
| +N | 100 < t ≤ 150 | 225 | 360–480 | 23 |
| +N | 150 < t ≤ 250 | 215 | 350–470 | 23 |
Room-temperature tensile properties are EN 10028-3 Table 4 values for the specified thickness bands, in the usual normalized (+N) condition. They are shared by the N, NH, NL1 and NL2 qualities of the P275 class. The 2017 edition is current; the figures shown are the official EN 10028-3:2003 Table 4 values for those specified bands, which BSI’s 2017 change list does not record as revised. Official 2017 Table 4 pages were not obtained in this pass. EN 10028-3:2017 deleted the option to agree properties above the tabulated maxima.
These tensile figures must not be read as EN 10028-2 P355GH or other-part requirements: in the thicker bands, Part 3 P355 Rm and ReH ranges differ from Part 2 P355GH.
Minimum impact energy KV for the normalized condition (J)
| Quality | Orientation | −50 °C | −40 °C | −20 °C | 0 °C | +20 °C |
|---|---|---|---|---|---|---|
| P…N and P…NH (this grade) | Transverse | — | — | 30 | 40 | 50 |
| P…N and P…NH (this grade) | Longitudinalb | — | — | 45 | 65 | 75 |
| P…NL1 | Transverse | — | 27 | 35 | 50 | 60 |
| P…NL1 | Longitudinalb | 30 | 40 | 50 | 70 | 80 |
| P…NL2 | Transverse | 27 | 30 | 40 | 60 | 70 |
| P…NL2 | Longitudinalb | 42 | 45 | 55 | 75 | 85 |
Minimum impact energy KV, in joules, for the normalized condition, from EN 10028-3 Table 6. The same table applies to every strength class in this part and is arranged by quality. P275NH is the elevated temperature quality; its design impact temperature is −20 °C. Basic verification is in the transverse direction (2017 option 11 is verification on longitudinal test pieces). b Longitudinal values apply for product thicknesses up to 40 mm. The thickness range in the 2003 official table is 5 mm to 250 mm, except that for P460NH, P460NL1 and P460NL2 it was limited to 100 mm. 2017 defined P460 properties above 100 mm; the official 2017 Table 6 upper-thickness wording was not obtained, so the 2003 P460 limit of 100 mm is disclosed and the contractual 2017 edition governs. A dash means no value is specified at that temperature. 2017 option 8 allows a 40 J minimum to be specified where lower minima are given. Option 10 allows mid-thickness impact verification. The figures are official EN 10028-3:2003 Table 6; ArcelorMittal’s EN 10028-3:2017 catalogue matches the thin-band values for the P275 and P355 qualities.
Minimum 0,2 % proof strength at elevated temperature (Rp0,2, MPa)
Table 5 applies to P275NH as an elevated-temperature (P…NH) grade.
| Product thickness t (mm) | 50 °C | 100 °C | 150 °C | 200 °C | 250 °C | 300 °C | 350 °C | 400 °C |
|---|---|---|---|---|---|---|---|---|
| t ≤ 16 | 266 | 250 | 232 | 213 | 195 | 179 | 166 | 156 |
| 16 < t ≤ 40 | 256 | 241 | 223 | 205 | 188 | 173 | 160 | 150 |
| 40 < t ≤ 60 | 247 | 232 | 215 | 197 | 181 | 166 | 154 | 145 |
| 60 < t ≤ 100 | 227 | 214 | 198 | 182 | 167 | 153 | 142 | 133 |
| 100 < t ≤ 150 | 218 | 205 | 190 | 174 | 160 | 147 | 136 | 128 |
| 150 < t ≤ 250 | 208 | 196 | 181 | 167 | 153 | 140 | 130 | 122 |
Minimum Rp0,2 values based on furnace-normalized test pieces (lower band of the relevant EN 10314 trend curve, with a confidence limit of about 98 % / 2s). They are material proof-stress minima, not allowable design stresses from a pressure-equipment design code. The figures are official EN 10028-3:2003 Table 5 for the specified bands. ArcelorMittal’s industry catalogue citing EN 10028-3:2017 matches the t ≤ 16 mm row for P275NH and P355NH. EN 10028-3:2017 deleted the option to agree values above the tabulated maxima. Application of these Table 5 values to the corresponding NL1 or NL2 grade is an ordering option (clause 8.4.2 / option 6), not an automatic requirement of those qualities.
Delivery Condition, Tests and Heat Treatment
Unless otherwise agreed, P275NH shall be supplied in the normalized condition (EN 10028-3:2017 clause 8.2.1). Normalizing may be replaced by normalizing rolling for all grades (clause 8.2.2); additional tests on simulated normalized samples may be agreed. Products may be delivered untreated if agreed (clause 8.2.3), with testing in the simulated normalized condition. The usual Part 3 delivery is therefore normalized or normalizing-rolled. It is not the thermomechanical rolling of EN 10028-5 and not the quenched and tempered condition of EN 10028-6.
Mechanical properties in Tables 4 to 6 apply in the normalized condition (clause 8.4.1). Inspection documents, surface condition and internal soundness follow EN 10028-1. Ultrasonic testing, through-thickness properties (EN 10164) and any hydrogen-induced-cracking test are ordering options and are not assumed on every P275NH plate. Informative Annex B of EN 10028-3:2017 holds weldability guidance moved there from clause 8.2.4; annex temperatures are not reproduced here as a substitute for the mill procedure or the contractual edition.
Available Dimensions of EN 10028-3 P275NH Steel Plate
Gangsteel supplies EN 10028-3 P275NH plate in thicknesses within the Table 4 bands for this grade, up to the tabulated maximum of 250 mm. Width, length, quantity and processing (cutting, beveling or forming to agreed drawings) are confirmed against each enquiry. Dimensional tolerances follow EN 10028-1. This page does not list a standing stock inventory and does not invent available sizes.
Main Applications of EN 10028-3 P275NH Steel Plate
EN 10028-3 P275NH is used for boilers, pressure vessels, heat-exchanger shells, storage tanks and other pressure equipment specified as this elevated temperature quality in the P275 yield class, for pressure service that specifies elevated-temperature 0,2 % proof strength together with normalized fine-grain toughness. It is specified under EN 10028-3 together with EN 10028-1, and may be used in equipment in the scope of Directive 2014/68/EU when the contractual edition and Annex ZA relationship are part of the order. This page does not itself certify PED conformity. P275NH is not selected in place of an EN 10028-2 GH grade, an EN 10028-5 thermomechanically rolled grade, an EN 10028-6 quenched and tempered grade, or an ASME Section II material unless the design specification explicitly allows that change. N, NH, NL1 and NL2 qualities of the same strength class share Table 4 tensile properties but are not automatic substitutes for one another.
Equivalent Grades of EN 10028-3 P275NH Steel Plate
The comparisons below use only existing Gangsteel product pages. A similar yield class or a related quality letter is not a universal equivalence. Substitution requires the design specification, the contractual edition and, where applicable, the notified body or purchaser. P275N, P460N and the P420NH / P420NL1 / P420NL2 grades are not given invented pages.
| Standard | Grade | Relationship (not automatic substitution) |
|---|---|---|
| EN 10028-3 | P275NL1 | Same Table 4 tensile class and the same strength-class chemistry (except the NL sulphur and phosphorus limits). P275NL1 is the low temperature quality, with Table 6 impact at −40 °C; Table 5 applies only if agreed. It is not an automatic substitute for P275NH. |
| EN 10028-3 | P275NL2 | Same Table 4 tensile class and the same strength-class chemistry (except the NL sulphur and phosphorus limits). P275NL2 is the special low temperature quality, with Table 6 impact at −50 °C; Table 5 applies only if agreed. It is not an automatic substitute for P275NH. |
| EN 10028-2 | P265GH | Existing Part 2 non-alloy elevated-temperature grade in a nearby yield class. Chemistry, impact, delivery designation and thicker-band tensile requirements differ from EN 10028-3 P275NH. Not a drop-in equivalent. This P265GH page sits in category 1 and is not redrafted in this batch. |
| EN 10028-2 | P295GH / P235GH | Part 2 GH grades with specified elevated-temperature properties, not fine-grain Part 3 qualities. Not equivalent to P275NH. |
| EN 10025-3 | S275N / S275NL | Normalized fine-grain structural steels, not EN 10028 pressure-vessel steels. Similar naming (N / NL) does not make them equivalent to P275NH. |
| ASTM / ASME | ASTM A516 Grade 60 / ASME SA516 Grade 60 | Carbon pressure-vessel plates under a different standard, with their own chemistry, heat treatment and impact rules. Strength may appear similar in some thicknesses; they are not EN 10028-3 P275NH and are not automatic substitutes. |
Related Products
- EN 10028-3 P275NL1 steel plate
- EN 10028-3 P275NL2 steel plate
- EN 10028-3 P355N steel plate
- EN 10028-3 P355NH steel plate
- EN 10028-3 P355NL1 steel plate
- EN 10028-3 P355NL2 steel plate
- EN 10028-3 P460NH steel plate
- EN 10028-3 P460NL1 steel plate
- EN 10028-3 P460NL2 steel plate
- EN 10028-2 P265GH steel plate
- EN 10028-2 P355GH steel plate
- EN 10028-2 P295GH steel plate
- EN 10028-2 P235GH steel plate
- EN 10028-2 16Mo3 steel plate
- EN 10028-5 P355M steel plate
- EN 10028-5 P355ML2 steel plate
- EN 10028-6 P355Q steel plate
- EN 10028-6 P355QL2 steel plate
- Pressure-vessel and boiler steel plate
FAQ about EN 10028-3 P275NH Steel Plate
What is EN 10028-3 P275NH steel plate?
EN 10028-3 P275NH (steel number 1.0487) is a weldable fine-grain steel for pressure purposes in EN 10028-3:2017 Table 1. It is the elevated temperature quality of the P275 class, classified as an alloy quality steel. The usual delivery condition is normalized (+N), and normalizing may be replaced by normalizing rolling. It is not an EN 10028-2 GH grade, not an EN 10028-5 thermomechanically rolled grade, and not an EN 10028-6 quenched and tempered grade.
What is the steel number of EN 10028-3 P275NH?
The steel number of EN 10028-3 P275NH is 1.0487, as given in EN 10028-3:2017 Table 1. P275NH and 1.0487 are the steel name and steel number of the same grade, not two different specifications.
What is the chemical composition of EN 10028-3 P275NH?
The Table 1 cast-analysis limits for EN 10028-3 P275NH are given in the chemical-composition table on this page, including the NL sulphur and phosphorus limits that apply to this quality. Product-analysis tolerances (Table 2) must not be used as heat-analysis limits. A maximum CEV may be agreed (Table 3) and is not an automatic requirement.
What are the mechanical properties of EN 10028-3 P275NH at room temperature?
EN 10028-3 Table 4 gives thickness-dependent minimum ReH, Rm range and minimum elongation for EN 10028-3 P275NH in the normalized condition, through the tabulated maximum of 250 mm. The figures on this page are the official 2003 Table 4 values for those specified bands; BSI’s 2017 change list does not record a revision of those specified-band figures. The 355 or 275 MPa in the grade name is the t ≤ 16 mm minimum yield, not the yield at every thickness.
At what temperature is EN 10028-3 P275NH impact-tested, and in which orientation?
For the elevated temperature quality, EN 10028-3 Table 6 specifies transverse minima of 30 J at −20 °C, 40 J at 0 °C and 50 J at +20 °C (no specified values at −40 °C or −50 °C). Basic verification is transverse; 2017 option 11 covers longitudinal verification. Longitudinal minima, which apply up to 40 mm, are 45 J, 65 J and 75 J at −20 °C, 0 °C and +20 °C. A 40 J minimum may be specified where lower Table 6 values are given (option 8). Mid-thickness impact may be agreed (option 10). The design impact temperature associated with this quality is −20 °C.
What is the elevated-temperature proof stress of EN 10028-3 P275NH?
EN 10028-3 Table 5 gives minimum Rp0,2 for EN 10028-3 P275NH by thickness and temperature from 50 °C to 400 °C in the tabulated bands, based on furnace-normalized test pieces. The figures on this page are the official 2003 Table 5 values for those bands. They are material properties, not allowable design stresses.
What delivery condition is specified for EN 10028-3 P275NH — normalized, TM or QT?
EN 10028-3 P275NH shall be supplied in the normalized condition unless otherwise agreed. Normalizing may be replaced by normalizing rolling for all EN 10028-3 grades (clause 8.2.2). Untreated delivery with testing in the simulated normalized condition may be agreed (clause 8.2.3). This is not the thermomechanical rolling of EN 10028-5 and not the quenched and tempered condition of EN 10028-6.
Is EN 10028-3 P275NH the same as EN 10028-3 P275NL1?
No. P275NH and P275NL1 share the P275 Table 4 tensile properties and the same strength-class chemistry (except the NL sulphur and phosphorus limits), but they are different qualities. P275NH is the elevated temperature quality (impact −20 °C); P275NL1 is the low temperature quality (impact −40 °C). They are not automatic substitutes. Selection follows the design temperature and toughness requirement.
Is EN 10028-3 P275NH equivalent to EN 10028-2 P265GH or to ASTM A516 Grade 60?
No. EN 10028-2 P265GH is a Part 2 GH grade in a nearby yield class, and its page is an existing product (category 1) not redrafted here. ASTM A516 Grade 60 and ASME SA516 Grade 60 are different-standard carbon plates. Neither is a drop-in equivalent of EN 10028-3 P275NH. There is no EN 10028-3 P275N page, and P275N is not in 2017 Table 1.
What thicknesses of EN 10028-3 P275NH are available?
Gangsteel supplies EN 10028-3 P275NH within the Table 4 thickness bands for this grade, up to the tabulated maximum of 250 mm. Width, length and processing are confirmed against each enquiry. This page does not list a standing stock inventory.
What should an enquiry for EN 10028-3 P275NH include?
An enquiry should name EN 10028-3 P275NH (or steel number 1.0487), the contractual edition, product thickness and quantity, the required quality (this grade is the elevated temperature quality), inspection document (EN 10204 3.1 or 3.2), and any agreed options: CEV (Table 3), Table 5 Rp0,2 for an NL grade (option 6), 40 J impact (option 8), longitudinal impact (option 11), mid-thickness impact (option 10), ultrasonic testing, EN 10164 through-thickness properties, and limited copper/tin (option 13). Visit Gangsteel or contact Gangsteel to place the enquiry.
For production, processing and export enquiries for EN 10028-3 P275NH steel plate, please contact Gangsteel. Visit Gangsteel for the full plate-supply range.