EN 10028-2 18MnMo4-5 Steel Plate | 18MnMo4-5 Mn-Mo Vessel Plate

18MnMo4-5 is the manganese-molybdenum step above 16Mo3 in EN 10028-2. Buyers search EN 10028-2 18MnMo4-5, 18MnMo4-5 steel plate, 1.5414, 18MnMo4-5 equivalent and 18MnMo4-5 Mn-Mo vessel plate. Steel number is 1.5414. Manganese is about 0.90–1.50%. Molybdenum is about 0.45–0.60%. That is more molybdenum than 16Mo3 and more manganese than 16Mo3.

Yield is in the 400 MPa class at ≤16 mm. Tensile is 550–700 MPa. Delivery is usually normalized and tempered (+NT). SHH STEEL is a global steel mill sourcing partner and steel manufacturer & exporter (mill-direct, China origin) for this grade.

Do not ship 16Mo3 against an 18MnMo4-5 drawing. 16Mo3 yield is 275 MPa and Mo is 0.25–0.35%. Do not ship P355GH and call carbon the same as Mn-Mo. The closest ASME comparison is often SA302 Grade B or SA302 Grade A. The closest Chinese talk grade is 18MnMoNbR steel plate. Dual marking is possible only when chemistry, tensile, impact and delivery all fit.

Company scope: China steel mill agent SHH STEEL.

This plate sits in pressure vessel steel plates. Mn-Mo comparisons belong on ASME SA302. Molybdenum-only comparisons belong on ASME SA204.

Cast analysis follows EN 10028-2 Table 1. Product analysis follows EN 10028-1 when ordered. Google queries such as 18MnMo4-5 chemical composition and 1.5414 chemistry should be answered from this table.

Cast Analysis and Product Analysis — EN 10028-2 18MnMo4-5 (1.5414)

Phosphorus and sulfur are tighter than on P355GH. Molybdenum is the alloy that lifts this grade above carbon plate and above 16Mo3. There is no 1% chromium requirement. This is Mn-Mo plate, not Cr-Mo plate. SHH STEEL reports cast analysis on every certificate and product analysis when ordered. Density is 7.85 g/cm³.

Buyers search 18MnMo4-5 mechanical properties, 18MnMo4-5 yield strength and 1.5414 tensile. Room-temperature values fall with thickness.

Tensile and Yield — EN 10028-2 18MnMo4-5

Elongation is typically 18–20% min on thinner plate. Impact at 0 °C, 27 J, is the usual option when the order names it. Elevated-temperature proof strength is part of EN 10028-2. Ask for that table when the vessel calculation uses design temperature.

Do not quote 400 MPa yield on a 80 mm plate. Do not treat 550–700 MPa tensile as permission to stamp SA302 Grade B without checking both books.

Search habits mix 18MnMo4-5 equivalent, 1.5414 equivalent and 18MnMo4-5 vs SA302 Grade B. Those names help a buyer find the right page. They do not authorize substitution.

Buyers pick 18MnMo4-5 when the PED file wants manganese-molybdenum plate stronger than 16Mo3 and does not want to jump to Cr-Mo. Search phrases such as 18MnMo4-5 boiler plate, 1.5414 steel plate and 18MnMo4-5 pressure vessel plate all point here.

Do not ship SA387 Grade 12 Class 2 against 18MnMo4-5. That grade is 1.25Cr-0.5Mo. An ASME file that wants Mn-Mo plate should name SA-302 on ASME SA302 and then write extras. 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.

18MnMo4-5 is Mn-Mo vessel plate. Treat welding as production welding, and as PED / ASME Code welding when the equipment is a vessel.

Qualify to the applicable code. ASME dual-name work uses ASME Section IX. Consumables must match the 550–700 MPa tensile band. A carbon procedure written for SA516 Grade 70 is not automatically valid. A 0.3Mo procedure written for 16Mo3 is the previous family. A Cr-Mo procedure written for SA387 Grade 12 Class 1 is the next 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 18MnMo4-5 (+NT). Buyers who search 18MnMo4-5 NT or 18MnMo4-5 heat treatment are asking for this route.

If the vessel will see PWHT, say so. 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 18MnMo4-5; 1.5414; heat number; cast analysis; 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 18MnMo4-5 Mn-Mo vessel plate:

• Thickness: commonly 8 mm – 150 mm, thicker by mill agreement
• Width: 1500 mm – 4000 mm
• Length: 3000 mm – 12000 mm

Chinese Mn-Mo-Nb plate belongs on 18MnMoNbR 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 tolerance table. Do not apply ASTM A36 structural tolerances to a PED vessel plate without writing them.

Charpy details. Temperature, energy, location and orientation. 0 °C / 27 J is common, not assumed.

Product analysis. Add this when the destination file wants finished-plate chemistry.

Elevated-temperature proof strength. Add 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.

Typical trade terms on this grade: FOB Shanghai, plus CIF to European, American, Middle East and Asian ports as the buyer names them.

Typical lead time:

• Ex-stock: about 5–7 days when Mn-Mo plate is 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 18MnMo4-5 that means mill pricing, 1.5414 chemistry reported as cast analysis and as product analysis when ordered, recorded +NT, tensile results to the correct thickness column, 3.1 as standard and 3.2 when specified.

We keep the grade on the order. 18MnMo4-5 is not 16Mo3. 18MnMo4-5 is not P355GH. 18MnMo4-5 is not SA387 Grade 12 Class 2. 18MnMo4-5 is not Q345R steel plate. If the drawing says 16Mo3, we will not ship 18MnMo4-5 and call molybdenum close.

Company scope: China steel mill agent SHH STEEL.