EN 10028-2 15NiCuMoNb5-6-4 Steel Plate | WB36 High Temp Vessel Plate

If a European power-plant drawing says WB36, it is almost never asking for P355GH. It is asking for 15NiCuMoNb5-6-4. That long EN name is the steel. WB36 is the name everyone actually types into Google. Steel number 1.6368. Buyers also search EN 10028-2 15NiCuMoNb5-6-4, WB36 steel plate, WB36 equivalent and WB36 high temp vessel plate. All of those belong on this page.

The alloy is the point. Nickel sits around 1.0–1.3%. Copper sits around 0.50–0.80%. Molybdenum sits around 0.25–0.50%. Niobium is not a leftover. That mix is why WB36 keeps strength in high-temperature water and steam service where plain carbon plate starts to look thin. It is not 1.25Cr-0.5Mo. It is not 2.25Cr-1Mo. It is not P91.

Yield is in the 440 MPa class on the usual thin-plate column. Tensile is 610–780 MPa. Delivery is usually normalized and tempered. SHH STEEL is a global steel mill sourcing partner and steel manufacturer & exporter (mill-direct, China origin) for this grade.

Do not ship P355GH against a WB36 drawing. P355GH has no nickel-copper-molybdenum-niobium set. Do not ship SA302 Grade B and call Mn-Mo the same as WB36. Do not ship SA387 Grade 12 Class 2 and call Cr-Mo close. Dual marking is possible only when chemistry, tensile, impact and delivery all fit. There is no clean one-line ASME twin for this grade. That is why the order has to keep the EN name.

Company scope: China steel mill agent SHH STEEL.

This plate sits in pressure vessel steel plates. Mn-Mo comparisons belong on ASME SA302. Mn-Mo-Ni comparisons belong on ASME SA533. Those books are useful for talk. They are not WB36.

Cast analysis follows EN 10028-2 Table 1. Product analysis follows EN 10028-1 when ordered. If someone searches WB36 chemical composition or 15NiCuMoNb5-6-4 chemistry, they want nickel, copper, molybdenum and niobium on the same line. A carbon table does not answer that.

Cast Analysis and Product Analysis — EN 10028-2 15NiCuMoNb5-6-4 (1.6368)

Read the table the way a mill metallurgist reads it. Nickel is there for toughness and high-temperature strength. Copper is there on purpose, not as scrap. Molybdenum is in the 16Mo3 neighbourhood but not alone. Niobium pins grain and helps the strength. If a certificate shows 0.08% Mo and no copper, that plate is not WB36. SHH STEEL reports cast analysis on every certificate and product analysis when ordered. Density is 7.85 g/cm³.

People search WB36 mechanical properties because the name sounds like a German mill brand, not a yield number. The EN table is still a thickness table. Yield falls as the plate gets thicker. Do not put 440 MPa on an 80 mm plate just because the headline said 440.

Tensile and Yield — EN 10028-2 15NiCuMoNb5-6-4 / WB36

Elongation is commonly around 19% min on thinner plate. Impact at 0 °C, 27 J, is the usual option when the order names it. Elevated-temperature proof strength is why this grade exists. If the calculation uses design temperature, ask for that table. Room-temperature yield alone is not the whole story.

Do not treat 610–780 MPa tensile as a free pass to stamp SA302 Grade B or SA533 Type B Class 2. Those books have different nickel, copper and niobium rules.

There is no honest one-box ASME equivalent. Say that out loud. Buyers still search WB36 equivalent and 15NiCuMoNb5-6-4 equivalent. Give them the comparison list, then keep the EN name on the order.

WB36 shows up on collector, drum and high-temperature water-bearing equipment in European power work. The designer picked nickel, copper, molybdenum and niobium together. That is a service choice, not a catalogue extra.

If the file says P355GH, buy P355GH. If the file says 16Mo3, buy 16Mo3. If the file says WB36 or 15NiCuMoNb5-6-4, buy this grade. Do not “improve” the order with SA387 Grade 22 Class 2 because 2.25Cr-1Mo sounds stronger. Different alloy, different welding, different PWHT.

An ASME file that only knows SA-302 or SA-533 should keep that ASME name and treat WB36 as a separate EN purchase. Dual marking is possible only when both books are met. SHH STEEL supplies this plate to fabricators in the United States, Mexico, South America, Europe, the Middle East, Africa and Asia.

WB36 welds like an alloy vessel plate, not like P265GH. Qualify to the applicable code. ASME dual-name work uses ASME Section IX. Consumables have to live with nickel and copper in the base metal. A carbon procedure written for SA516 Grade 70 is the wrong family. A Grade 12 Cr-Mo procedure written for SA387 Grade 12 Class 2 is also the wrong family. Preheat follows thickness and hydrogen control. The fabricator owns the WPS. SHH STEEL can share mill heat data for that review.

Usual delivery from SHH STEEL is normalized and tempered EN 10028-2 15NiCuMoNb5-6-4. People who search WB36 heat treatment or WB36 NT want that route, not as-rolled carbon plate.

If the vessel will see PWHT, write it. Test coupons then follow a simulated cycle. Extra simulation, 3.2 hold points or special NDE add time. Plan about two months when those extras are on the order.

The certificate lists EN 10028-2 15NiCuMoNb5-6-4; WB36 when the order uses that name; 1.6368; heat number; cast analysis with Ni, Cu, Mo and Nb; product analysis when ordered; tensile to the correct thickness column; +NT; impact when ordered; elevated-temperature values when ordered. Certificates may be EN 10204 3.1 or EN 10204 3.2.

Usual supply range from SHH STEEL for WB36 high temp vessel plate:

• Thickness: commonly 8 mm – 120 mm, thicker by mill agreement
• Width: 1500 mm – 3500 mm
• Length: 3000 mm – 12000 mm

Mn-Ni-Mo Chinese vessel plate belongs on 13MnNiMoR steel plate. Carbon vessel plate belongs on Q345R steel plate. Cr-Mo plate belongs on 15CrMoR steel plate.

Dimensional limits follow EN 10028-1 and EN 10029 unless the order names another table. Do not apply ASTM A36/A36M structural tolerances to a PED alloy vessel plate without writing them.

Charpy details. Temperature, energy, location and orientation.

Product analysis. Useful here, because nickel, copper, molybdenum and niobium are the grade.

Elevated-temperature proof strength. Write this when the calculation uses design temperature.

Simulated PWHT. When the equipment will be stress-relieved.

NDE. EN 10160 or the named UT class.

Third-party. EN 10204 3.2 when written.

SHH STEEL is a global steel mill sourcing partner with mill partnerships in China. We supply ASTM, ASME, EN, DIN, JIS and GB steel to buyers outside a single region. Origin is mill-direct, China origin.

SHH STEEL has supplied steel plates to the USA, Mexico, Argentina, Peru, El Salvador, Spain, Netherlands, Germany, UAE, Saudi Arabia, South Africa, India, Thailand, Singapore, Vietnam, the Philippines, Japan and Korea.

WB36 is not a stock grade in every yard. Say the thickness and the delivery condition early. Typical trade terms: FOB Shanghai, plus CIF to the port the buyer names.

Typical lead time:

• Ex-stock: about 5–7 days only when WB36 is actually in yard
• Mill rolling, standard +NT: about 45 days
• Simulated PWHT, 3.2 or extra NDE: about 2 months

SHH STEEL is a global steel mill sourcing partner and steel manufacturer & exporter (mill-direct, China origin). On EN 10028-2 15NiCuMoNb5-6-4 / WB36 that means mill pricing, 1.6368 chemistry with Ni-Cu-Mo-Nb reported, product analysis when ordered, recorded +NT, tensile to the correct thickness column, 3.1 as standard and 3.2 when specified.

We keep the name on the order. WB36 is not P355GH. WB36 is not SA302 Grade B. WB36 is not Q345R steel plate. If the drawing says WB36, we will not ship carbon plate and call 440 MPa close.

Company scope: China steel mill agent SHH STEEL.