EN 10028-6 P500QL1 Steel Plate | P500QL1 QT -40°C Vessel Plate supplier
What is EN 10028-6 P500QL1 Steel?
P500QL1 is the −40 °C quenched-and-tempered quality in the P500 family of EN 10028-6. Buyers search EN 10028-6 P500QL1, P500QL1 steel plate, 1.8875, P500QL1 QT -40°C vessel plate and P500QL1 supplier. QL1 is the low-temperature letter set on a QT route. This page is not P500Q. Q is room-temperature QT. This page is not P500QH. QH is elevated-temperature QT. This page is not P500QL2. QL2 is −60 °C. This page is not P460QL1. P460QL1 is a 460 MPa step. This page is not S500QL. S500QL is EN 10025-6 structural QT steel.
Yield is 500 MPa at ≤50 mm. Tensile is 590–770 MPa. Steel number is 1.8875. 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 P500Q, we will not ship P500QL1 and call 500 enough. If a drawing says S500QL, we will not ship P500QL1 and call −40 °C automatic dual name unless both books are met. Dual marking with SA517 Grade Q is possible only when chemistry, tensile, impact temperature and delivery all fit.
Material Specification
| Specification Element | Requirement | SHH STEEL Compliance |
|---|---|---|
| Grade | EN 10028-6 P500QL1 | Confirmed |
| Steel number | 1.8875 | Confirmed |
| Product specification | EN 10028-6 + EN 10028-1 | Applied |
| Steel type | Weldable fine-grain QT, −40 °C | Confirmed |
| Usual delivery | Q quenched and tempered | Confirmed |
| Yield idea | 500 MPa at ≤50 mm | Confirmed |
| Tensile | 590–770 MPa at ≤50 mm | Confirmed |
| Impact idea | −40 °C | Confirmed |
| Supply role | Global steel mill sourcing partner | SHH STEEL |
| Certification | EN 10204 3.1 or 3.2 / third-party | As ordered |
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.
Chemical Composition
Cast analysis follows EN 10028-6. Product analysis follows EN 10028-1 when ordered.
Cast Analysis and Product Analysis — EN 10028-6 P500QL1 (1.8875)
| Element | Cast Analysis (%) | Product Analysis, when ordered (%) |
|---|---|---|
| Carbon (C), max | 0.18 | 0.20 |
| Silicon (Si), max | 0.60 | 0.65 |
| Manganese (Mn) | 1.10 – 1.70 | 1.05 – 1.80 |
| Phosphorus (P), max | 0.020 | 0.025 |
| Sulfur (S), max | 0.010 | 0.013 |
| Aluminum total (Al), min | 0.020 | 0.015 |
| Nitrogen (N), max | 0.015 | 0.017 |
| Chromium (Cr), max | 0.30 | 0.35 |
| Copper (Cu), max | 0.30 | 0.35 |
| Molybdenum (Mo), max | 0.20 | 0.22 |
| Nickel (Ni), max | 1.00 | 1.05 |
| Niobium (Nb), max | 0.05 | 0.06 |
| Titanium (Ti), max | 0.05 | 0.06 |
| Vanadium (V), max | 0.08 | 0.10 |
Phosphorus and sulfur sit tighter than on P500Q because QL1 is a toughness quality. 500 MPa still comes from quench and temper plus 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.
Mechanical Properties
Buyers search P500QL1 mechanical properties, P500QL1 impact and P500QL1 -40°C. Yield still falls with thickness. Impact is the QL1 item.
Tensile and Yield — EN 10028-6 P500QL1
| Thickness (mm) | Yield min (MPa) | Tensile (MPa) |
|---|---|---|
| ≤ 50 | 500 | 590 – 770 |
| 50 – 100 | 480 | 590 – 770 |
| 100 – 150 | 440 | 560 – 750 |
| Density | 7.85 g/cm³ | 7.85 g/cm³ |
Elongation is typically 16% 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 500 MPa yield on a 120 mm plate. Do not treat −40 °C as permission to stamp SA517 Grade Q or S500QL without checking both books.
Material Comparison
| Grade | Book | What buyers search | Swap? |
|---|---|---|---|
| EN 10028-6 P500Q | EN 10028-6 | P500Q steel plate | No |
| EN 10028-6 P500QH | EN 10028-6 | P500QH steel plate | No |
| EN 10028-6 P500QL1 | EN 10028-6 | P500QL1 steel plate | This page |
| EN 10028-6 P500QL2 | EN 10028-6 | P500QL2 | No |
| EN 10028-6 P460QL1 | EN 10028-6 | P460QL1 | No |
| SA517 Grade Q | SA-517 | SA517 Gr.Q | No auto swap |
| SA517 Grade F | SA-517 | SA517 Gr.F | No auto swap |
| SA543 Type B Class 1 | SA-543 | SA543 Type B Cl.1 | No auto swap |
| EN 10025-6 S500QL | EN 10025-6 | S500QL | No |
Equivalent Material Grades
| Designation | Standard / region | Notes |
|---|---|---|
| EN 10028-6 P500QL1 / 1.8875 | EN 10028-6 | Name on this page |
| P500Q / 1.8873 | EN 10028-6 | Room-temp QT sister |
| P500QH / 1.8874 | EN 10028-6 | Elevated-temp QT sister |
| P500QL2 | EN 10028-6 | −60 °C QT sister |
| P460QL1 / 1.8881 | EN 10028-6 | Previous 460 MPa QL1 step |
| SA517 Grade Q | SA-517 | ASME QT vessel |
| SA517 Grade F | SA-517 | ASME QT vessel |
| SA543 Type B Class 1 | SA-543 | ASME Ni-Cr-Mo QT |
| EN 10025-6 S500QL | EN 10025-6 | Structural QT −40 °C |
QT -40°C 500 MPa Pressure-Vessel Service
Buyers pick P500QL1 when a PED file wants 500 MPa QT plate and Charpy at −40 °C. Search phrases such as P500QL1 -40°C, P500QL1 QT and 1.8875 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 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.
Weldability
P500QL1 is killed QT fine-grain C-Mn vessel plate at 590–770 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 500 MPa band. A P460QL1 procedure is the previous family. A carbon procedure written for SA516 Grade 70 is light on strength. 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.
Heat Treatment and Delivery Condition
Usual delivery from SHH STEEL is quenched and tempered EN 10028-6 P500QL1 (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 500 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 P500QL1; 1.8875; 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.
Dimensions
Usual supply range from SHH STEEL for P500QL1 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 500 QT plate belongs on EN 10025-6. ASME QT vessel plate belongs on SA517 Grade Q.
Tolerances
Dimensional limits for EN 10028-6 P500QL1 follow EN 10028-1 and EN 10029 unless the purchase order names another table. Class A is the usual mill default for P500QL1 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 P500QL1 (EN 10029 Class A, reference)
| Nominal thickness (mm) | Class A minus (mm) | Class A plus (mm) |
|---|---|---|
| 8 – 15 | −0.5 | +0.9 |
| 15 – 25 | −0.6 | +1.0 |
| 25 – 40 | −0.7 | +1.1 |
| 40 – 80 | −0.8 | +1.2 |
| 80 – 150 | −1.0 | +1.4 |
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 P500QL1 unless the order says so.
Supplementary Requirements
Charpy details. Write −40 °C, joules, location and orientation.
Impact after simulated PWHT. When the vessel will be stress-relieved.
Product analysis. Especially P, S, Al, N, Nb and V.
NDE. EN 10160 or ASTM A435 / A578 as named.
Third-party. EN 10204 3.2 when written.
Applications
| Industry | Typical components |
|---|---|
| PED high-strength low-temp QT vessels | EN 10028-6 P500QL1 shells at −40 °C |
| Storage tanks and drums | P500QL1 courses |
| Dual-certified export | P500QL1 / SA517 Grade Q when both books fit |
| Comparison vs 460 QL1 | P500QL1 next to P460QL1 |
P500QL1 is the plate for a 500 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 P500QL2.
Supply Capability
SHH STEEL sources EN 10028-6 P500QL1 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.
Global Delivery & Markets
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.
Why Choose SHH STEEL
Experience on this grade is simple: keep the letters after P500. 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 P500QL1 from first-line mills, reports 1.8875 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. P500QL1 is not P500Q. P500QL1 is not P500QL2. P500QL1 is not S500QL. P500QL1 is not Q345R steel plate. If the drawing says −60 °C, we will not ship QL1 and call minus forty close.
FAQ
- What is P500QL1 steel plate?
- P500QL1 is an EN 10028-6 quenched-and-tempered fine-grain pressure-vessel plate, steel number 1.8875. Yield is 500 MPa at ≤50 mm and tensile is 590–770 MPa. QL1 means Charpy at −40 °C on a QT route. SHH STEEL supplies this plate worldwide as a global steel mill sourcing partner.
- What is the equivalent of P500QL1?
- Related comparisons are P500QL2, SA-517 Grade Q and S500QL. Dual marking is possible only when both books are fully met.
- How is P500QL1 different from P500Q?
- P500Q is room-temperature QT. P500QL1 is −40 °C QT.
- How is P500QL1 different from P500QL2?
- QL2 is −60 °C. Do not ship QL1 against a QL2 drawing.
- Is P500QL1 the same as S500QL?
- No. S500QL is EN 10025-6 structural QT steel. P500QL1 is EN 10028-6 pressure-vessel plate.
Conclusion
EN 10028-6 P500QL1 Steel Plate is European quenched-and-tempered fine-grain −40 °C pressure-vessel plate, steel number 1.8875, at the 500 MPa yield step and 590–770 MPa tensile at ≤50 mm. Whether the inquiry says EN 10028-6 P500QL1, 1.8875, P500QL1 QT -40°C Vessel Plate or P500QL1 supplier, SHH STEEL as a global steel mill sourcing partner and steel manufacturer & exporter (mill-direct, China origin) supplies plate with P500QL1 chemistry, recorded QT, Charpy at −40 °C when ordered, and EN 10204 3.1 or 3.2 certification.
SHH STEEL supplies EN 10028-6 P500QL1 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 P500QL1 Steel Plate, P500QL1 QT -40°C vessel plate, 1.8875, P500QL1 supplier, SHH STEEL








