EN 10028-6 P355QH Steel Plate | P355QH QT High Temp Vessel Plate supplier

EN 10028-6 P355QH Steel Plate | P355QH QT High Temp Vessel Plate supplier

Brief Description
EN 10028-6 P355QH is European QT fine-grain high-temperature vessel plate, steel number 1.8867. Yield is 355 MPa at ≤50 mm. Elevated-temperature proof is specified. SHH STEEL supplies P355QH worldwide as a global steel mill sourcing partner.

SEO Title
EN 10028-6 P355QH Steel Plate | P355QH QT High Temp Vessel Plate supplier – SHH STEEL

SEO Keywords
EN 10028-6 P355QH, P355QH, P355QH steel plate, 1.8867, P355QH QT high temp, P355QH equivalent, P355QH supplier

SEO Description
SHH STEEL supplies EN 10028-6 P355QH QT high-temp vessel plate worldwide, 355 MPa yield, 490–630 MPa tensile, steel number 1.8867. EN 10204 3.1/3.2 mill-direct supply. Contact now.

General Description

P355QH is the elevated-temperature quenched-and-tempered quality in the P355 family of EN 10028-6. Buyers search EN 10028-6 P355QH, P355QH steel plate, 1.8867, P355QH QT high temp vessel plate and P355QH supplier. The letters QH mean QT plate with specified proof strength at elevated temperature. This page is not P355Q. Q is room-temperature QT. This page is not P355QL1. QL1 is −40 °C. This page is not P355QL2. QL2 is −60 °C. This page is not EN 10028-3 P355NH. NH is normalized high-temp plate. This page is not EN 10028-2 P355GH. GH is high-temp carbon, not QT. This page is not EN 10028-5 P355M.

Yield is 355 MPa at ≤50 mm at room temperature. Tensile is 490–630 MPa. Steel number is 1.8867. Delivery is QT (Q). Elevated-temperature proof values must sit on the certificate when the order follows QH. SHH STEEL is a global steel mill sourcing partner and steel manufacturer & exporter (mill-direct, China origin). We buy this grade from qualified Chinese mills, check the certificate against EN 10028-6, and ship it to fabricators in the USA, Europe, Middle East, Southeast Asia, Africa and South America.

If a drawing says P355Q, we will not ship P355QH and call 355 enough. If a drawing says P355NH, we will not ship P355QH and call high temp automatic dual name unless both books are met. Dual marking with Q345R steel plate is possible only when chemistry, tensile, elevated-temperature proof and delivery all fit.

This plate sits in pressure vessel steel plates and carbon steel plates. High-temp carbon sisters belong on EN 10028-2. Normalized high-temp sisters belong on EN 10028-3. Structural QT belongs on EN 10025-6.

Cast analysis follows EN 10028-6. Product analysis follows EN 10028-1 when ordered.

Cast Analysis and Product Analysis — EN 10028-6 P355QH (1.8867)

QH uses the same P355 QT melt family as P355Q. The extra on this page is elevated-temperature proof, not extra nickel. SHH STEEL prints heat analysis on every certificate and product analysis when ordered. Density is 7.85 g/cm³.

Buyers search P355QH mechanical properties, P355QH yield strength and P355QH high temperature. Room-temperature values follow the Q table. Elevated-temperature proof is the QH item.

Tensile and Yield at room temperature — EN 10028-6 P355QH

Elevated-temperature 0.2% proof strength idea (P355QH, thin-plate class)

Use the official EN 10028-6 table for the thickness column on the mill certificate. Elongation is typically 22% min at room temperature. QH does not automatically include −40 °C Charpy. If the file needs −40 °C, the grade name is P355QL1.

Do not quote 355 MPa yield on a 120 mm plate. Do not treat QH as permission to stamp EN 10028-2 P355GH or EN 10028-3 P355NH without checking both books.

Buyers pick P355QH when a PED file wants 355 MPa QT plate and proof strength at 200–400 °C. Search phrases such as P355QH high temp, P355QH QT and 1.8867 steel plate all point here.

It is not a substitute for EN 10028-2 16Mo3. That grade is 0.3Mo high-temp steel. It is not a substitute for EN 10028-2 13CrMo4-5. That grade is 1.25Cr-0.5Mo. An ASME high-temp carbon file should name SA-515 or SA-516 with the design temperature written. 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.

P355QH is killed QT fine-grain C-Mn vessel plate. Treat welding as production welding, and as PED / ASME Code welding when the equipment is a vessel.

Qualify to the applicable code. Consumables must keep strength after a possible PWHT cycle. A procedure written for SA516 Grade 70 is a comparison only. A Cr-Mo procedure written for SA387 Grade 11 Class 1 is the wrong family. Preheat and interpass must stay inside the qualified window so the QT structure is not damaged. The fabricator owns the WPS. SHH STEEL can share mill heat data for that review.

Usual delivery from SHH STEEL is quenched and tempered EN 10028-6 P355QH (Q). Elevated-temperature proof tests are added when the order names QH.

If the vessel will see PWHT, say so. QT plus elevated-temperature proof can move after a long stress-relief cycle. Simulated PWHT on test coupons is worth naming. 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 10028-6 P355QH; 1.8867; heat number; cast analysis; product analysis when ordered; tensile to the correct thickness column; Q / QT; elevated-temperature proof when ordered. Certificates may be EN 10204 3.1 or EN 10204 3.2.

Usual supply range from SHH STEEL for P355QH QT high temp vessel plate:

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

Normalized high-temp 355 plate belongs on EN 10028-3 P355NH. High-temp carbon belongs on EN 10028-2 P355GH.

Dimensional limits for EN 10028-6 P355QH follow EN 10028-1 and EN 10029 unless the purchase order names another table. Class A is the usual mill default for P355QH QT high temp vessel plate. Class B, Class C or Class D is supplied only when written. Do not apply ASTM A36 structural tolerances to a PED QT high-temp plate without writing them.

Typical thickness tolerance idea for P355QH (EN 10029 Class A, reference)

Width on 1500–4000 mm plate is commonly held to about ±20–25 mm unless the mill quote names a tighter extra. Length on 3000–12000 mm plate is commonly held to about +50 / 0 mm or ±25 mm by mill practice. Flatness follows EN 10029 Class N unless Class S is written. Edge condition is mill edge or cut edge as ordered. If the vessel calculation used minimum thickness after corrosion, write the allowed minus on the RFQ. SHH STEEL will not assume Class B or a zero-minus extra on P355QH unless the order says so.

Elevated-temperature proof. Write the test temperatures required by the design.

Charpy details. QH does not assume −40 °C. Write temperature if impact is also required.

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

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

NDE. EN 10160 or the named UT class.

Third-party. EN 10204 3.2 when written.

P355QH is the plate for a 355 MPa PED file that wants QT and elevated-temperature proof. It is the wrong plate for a winter tank at −40 °C. That work is P355QL1. It is the wrong plate for 1.25Cr-0.5Mo service. That work is EN 10028-2 13CrMo4-5.

SHH STEEL sources EN 10028-6 P355QH from first-line Chinese mills and ships it on worldwide terms. Partner mills include Wuyang (Wugang), Angang, Shougang, Hanye, Anyang Iron & Steel, Baosteel, Xinyu, Xingcheng, Yongjin, Tsingshan, TISCO (Taiyuan), Jiuquan (JISCO), Lianzhong, Zhangpu and Baoxin, plus other qualified mills when the size or QT route requires it.

Mill test certificates are issued to EN 10204 3.1 as standard. EN 10204 3.2 is arranged when the order names a third-party hold point.

Usual stock and rolling thickness: 10 mm, 12 mm, 16 mm, 20 mm, 25 mm, 30 mm, 32 mm, 36 mm, 40 mm, 50 mm, 60 mm, 80 mm, 100 mm, thicker by mill agreement.

Processing: CNC or flame cutting, bevel, flattening, UT to EN 10160 or the named class.

Trade terms: FOB Shanghai main, CIF destination available. Payment: TT, LC, or TT + LC.

Ocean time from Shanghai: US West 14–18 days; US Gulf 28–35 days; Rotterdam / Antwerp 28–35 days; Jebel Ali 18–25 days; Singapore 7–12 days; other ports quoted.

Third-party: SGS, TÜV, BV, ABS, CCS, GL, VL, DNV, RINA, NK, KR, or the inspector named.

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 in the United States, Europe, the Middle East, Southeast Asia, Africa and South America. 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 lead time: ex-stock 5–7 days; standard QT about 45–60 days; elevated-temperature tests / 3.2 about 2 months.

Experience on this grade is simple: keep the letters after P355. Q, QH, QL1 and QL2 are four different purchase orders. SHH STEEL as a global steel mill sourcing partner and steel manufacturer & exporter (mill-direct, China origin) prices P355QH from first-line mills, reports 1.8867 chemistry, records QT, prints elevated-temperature proof when ordered, and issues 3.1 as standard or 3.2 when specified.

We keep the grade on the order. P355QH is not P355Q. P355QH is not EN 10028-3 P355NH. P355QH is not EN 10028-2 P355GH. P355QH is not Q345R steel plate. If the drawing says P355QL1, we will not ship QH and call high temp close.

EN 10028-6 P355QH Steel Plate is European quenched-and-tempered fine-grain high-temperature pressure-vessel plate, steel number 1.8867, at the 355 MPa yield step and 490–630 MPa tensile at ≤50 mm. Whether the inquiry says EN 10028-6 P355QH, 1.8867, P355QH QT High Temp Vessel Plate or P355QH supplier, SHH STEEL as a global steel mill sourcing partner and steel manufacturer & exporter (mill-direct, China origin) supplies plate with P355QH chemistry, recorded QT, elevated-temperature proof when ordered, and EN 10204 3.1 or 3.2 certification.

SHH STEEL supplies EN 10028-6 P355QH QT High Temp Vessel Plate to the USA, Mexico, South America, Europe, the Middle East, Africa and Asia for work that actually names this grade.

Contact SHH STEEL for mill rolling, stock inquiry, cutting, bevel, 3.2 inspection or a worldwide quotation.

EN 10028-6 P355QH Steel Plate, P355QH QT high temp vessel plate, 1.8867, P355QH supplier, SHH STEEL