EN 10028-6 P690QL1 Steel Plate | P690QL1 QT -40°C Vessel Plate supplier

P690QL1 is the −40 °C quenched-and-tempered quality in the P690 family of EN 10028-6. Buyers search EN 10028-6 P690QL1, P690QL1 steel plate, 1.8943, P690QL1 QT -40°C vessel plate and P690QL1 supplier. QL1 is the low-temperature letter set on a QT route. This page is not P690Q. Q is room-temperature QT. This page is not P690QH. QH is elevated-temperature QT. This page is not P690QL2. QL2 is −60 °C. This page is not P500QL1. P500QL1 is a 500 MPa step. This page is not S690QL. S690QL is EN 10025-6 structural QT steel.

Yield is 690 MPa at ≤50 mm. Tensile is 770–940 MPa. Steel number is 1.8943. Delivery is QT (Q). Charpy is specified at −40 °C when the order follows QL1. 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 P690Q, we will not ship P690QL1 and call 690 enough. If a drawing says S690QL, we will not ship P690QL1 and call −40 °C automatic dual name unless both books are met. Dual marking with SA517 Grade Q is possible only when both books are fully met.

This plate sits in pressure vessel steel plates and high-strength low-alloy plates. Structural QT belongs on EN 10025-6. ASME QT vessel comparisons belong on ASME SA517 and ASME SA543.

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

Cast Analysis and Product Analysis — EN 10028-6 P690QL1 (1.8943)

Phosphorus and sulfur sit tighter than on P690Q because QL1 is a toughness quality. 690 MPa still comes from quench and temper plus Ni-Cr-Mo micro-alloying, not from extra carbon. SHH STEEL prints heat analysis on every certificate and product analysis when ordered. Density is 7.85 g/cm³.

Buyers search P690QL1 mechanical properties, P690QL1 impact and P690QL1 -40°C. Yield still falls with thickness. Impact is the QL1 item.

Tensile and Yield — EN 10028-6 P690QL1

Elongation is typically 14% min on thinner plate. Charpy for QL1 is −40 °C. Energy is commonly 27 J average when the order follows the book. Location and orientation must be written. Do not assume QL2 −60 °C on this page.

Do not quote 690 MPa yield on a 120 mm plate. Do not treat −40 °C as permission to stamp SA517 Grade Q or S690QL without checking both books.

Buyers pick P690QL1 when a PED file wants 690 MPa QT plate and Charpy at −40 °C. Search phrases such as P690QL1 -40°C, P690QL1 QT and 1.8943 steel plate all point here.

It is not a substitute for 09MnNiDR steel plate. That grade is −70 °C. It is not a substitute for 08Ni3DR steel plate. That grade is 3.5Ni. An ASME QT file should name SA-517 or SA-543 with a written −40 °C extra. 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.

P690QL1 is killed QT high-strength vessel plate at 770–940 MPa tensile. 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 toughness at −40 °C and match the 690 MPa band. A P500QL1 procedure is the previous family. A carbon procedure written for SA516 Grade 70 is far too light. Preheat, interpass and hydrogen control must stay inside the qualified window so the QT structure is not damaged and delayed cracking is avoided. 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 P690QL1 (Q). This is not +N from EN 10028-3 and not M from EN 10028-5.

If the vessel will see PWHT, say so. Impact after simulated PWHT is worth naming on a −40 °C 690 MPa QT file. 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 P690QL1; 1.8943; heat number; cast analysis; product analysis when ordered; tensile to the correct thickness column; Q / QT; Charpy at −40 °C when ordered. Certificates may be EN 10204 3.1 or EN 10204 3.2.

Usual supply range from SHH STEEL for P690QL1 QT -40°C vessel plate:

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

Structural −40 °C 690 QT plate belongs on EN 10025-6. ASME QT vessel plate belongs on SA517 Grade Q.

Dimensional limits for EN 10028-6 P690QL1 follow EN 10028-1 and EN 10029 unless the purchase order names another table. Class A is the usual mill default for P690QL1 QT -40°C vessel plate. Class B, Class C or Class D is supplied only when written. Do not apply ASTM A36 structural tolerances to a PED −40 °C QT plate without writing them.

Typical thickness tolerance idea for P690QL1 (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 P690QL1 unless the order says so.

EN 10028-6 P690QL1 is already a −40 °C high-strength QT quality. Extra items still have to be written on the purchase order. SHH STEEL will not assume them from the grade name alone.

Charpy details. Write −40 °C, joules, specimen size, location and orientation. Transverse and longitudinal are not the same test. Do not write “impact as per EN 10028-6” and expect the mill to guess QL1.

Impact after simulated PWHT. When the vessel will be stress-relieved, name the hold temperature, hold time and cooling rate used on the test coupon. A 690 MPa QT plate can lose toughness after a long PWHT cycle. The coupon should see the same cycle the vessel will see.

Product analysis. Especially P, S, Al, N, Ni, Cr, Mo, B, Nb and V on finished plate. Cast analysis alone is not always enough for a destination file that wants product analysis.

Through-thickness / Z-test. Name Z15, Z25 or Z35 when the plate will be welded in the thickness direction or used for nozzles and tees. Reduction of area must sit on the certificate.

NDE. EN 10160 class, ASTM A435 or ASTM A578 as named. Write scanning extent and acceptance class. For thick QT plate, UT after quench and temper is the usual route.

Hardness. If the destination file caps hardness after QT or after simulated PWHT, write the max HB or HV and the test location.

HIC / SSC / NACE. Only when the equipment is sour service. P690QL1 is not automatically NACE MR0175 / ISO 15156. Write the test method, solution and acceptance if required.

Third-party witness. EN 10204 3.2 with SGS, TÜV, BV, ABS, CCS, DNV or the inspector named. Hold points for heat treatment, tensile, −40 °C impact and UT should be listed on the ITP.

Identification and stamping. Heat number, grade P690QL1 / 1.8943, QT, thickness and mill logo on each plate. Transfer marks after cutting if the plate will be cut before shipment.

P690QL1 is the plate for a 690 MPa PED file that wants QT and −40 °C. It is the wrong plate for LNG inner tanks. That work belongs on 06Ni9DR steel plate. It is the wrong plate for −60 °C. That work is P690QL2.

SHH STEEL sources EN 10028-6 P690QL1 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; simulated PWHT / 3.2 about 2 months.

Experience on this grade is simple: keep the letters after P690. 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 P690QL1 from first-line mills, reports 1.8943 chemistry, records QT, prints Charpy at −40 °C when ordered, and issues 3.1 as standard or 3.2 when specified.

We keep the grade on the order. P690QL1 is not P690Q. P690QL1 is not P690QL2. P690QL1 is not S690QL. P690QL1 is not Q345R steel plate. If the drawing says −60 °C, we will not ship QL1 and call minus forty close.

EN 10028-6 P690QL1 Steel Plate is European quenched-and-tempered high-strength −40 °C pressure-vessel plate, steel number 1.8943, at the 690 MPa yield step and 770–940 MPa tensile at ≤50 mm. Whether the inquiry says EN 10028-6 P690QL1, 1.8943, P690QL1 QT -40°C Vessel Plate or P690QL1 supplier, SHH STEEL as a global steel mill sourcing partner and steel manufacturer & exporter (mill-direct, China origin) supplies plate with P690QL1 chemistry, recorded QT, Charpy at −40 °C when ordered, and EN 10204 3.1 or 3.2 certification.

SHH STEEL supplies EN 10028-6 P690QL1 QT -40°C 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 P690QL1 Steel Plate, P690QL1 QT -40°C vessel plate, 1.8943, P690QL1 supplier, SHH STEEL