EN10028-6 P690QL1 P690QL2 Boiler Steel Plate
P690QL1 is a high-strength low-alloy steel with two grades: P690QL1 and P690QL2. It belongs to the pressure vessel steel plate under the European standard EN10028-6. P690QL1 steel plate is mainly used to manufacture equipment such as high-pressure vessels and boilers.
P690QL2 steel is a weldable fine-grain structural steel (alloy high-grade steel) used in pressure vessel construction. Low temperature range applications up to -40°C.
p690QL1 vessel plate chemical composition
| C | Si | Mn | Ni | P | S | Cr | Mo | V | N | Nb | Ti | Cu | Zr | B |
| max 0.2 | max 0.8 | max 1.7 | max 2.5 | max 0.02 | max 0.008 | max 1.5 | max 0.7 | max 0.12 | max 0.015 | max 0.06 | max 0.05 | max 0.3 | max 0.15 | max 0.005 |
P690QL2 boiler plate chemical composition
| C | Si | Mn | Ni | P | S | Cr | Mo | V | N | Nb | Ti | Cu | Zr | B |
| max 0.2 | max 0.8 | max 1.7 | max 2.5 | max 0.02 | max 0.005 | max 1.5 | max 0.7 | max 0.12 | max 0.015 | max 0.06 | max 0.05 | max 0.3 | max 0.15 | max 0.005 |
P690QL1 boiler steel plate mechanical property
| Nominal thickness (mm): | to 100 | 100 - 150 |
| Rm - Tensile strength (MPa) (+QT) | 770-940 | 720-900 |
| Nominal thickness (mm): | to 50 | 50 - 100 | 100 - 150 |
| ReH - Minimum yield strength (MPa) (+QT) | 690 | 670 | 630 |
| Nominal thickness(mm): | to 20 | 20 - 40 | 40 - 50 | 50 - 65 | 65 - 80 | 80 - 100 |
| Rp0.2 0.2% proof strength (MPa) (+QT) | 690 | 650 | 615 | 580 | 540 | 500 |
| KV - Impact energy (J) transverse, (+QT) | -40° 27 |
-20° 31-40 |
0° 39-60 |
+20° 43 |
| KV - Impact energy (J) longitud., (+QT) | -30° 40 |
-20° 47 |
-10° 53 |
0° 60 |
+20° 65 |
| A - Min. elongation at fracture (%) (+QT) | 14-16 |
P690QL2 steel boiler plate mechanical property
| Nominal thickness (mm): | to 100 | 100 - 150 |
| Rm - Tensile strength (MPa) (+QT) | 770-940 | 720-900 |
| Nominal thickness (mm): | to 50 | 50 - 100 | 100 - 150 |
| ReH - Minimum yield strength (MPa) (+QT) | 690 | 670 | 630 |
| Nominal thickness(mm): | to 40 | 40 - 50 | 50 - 65 | 65 - 80 | 80 - 100 |
| Rp0.2 0.2% proof strength (MPa) (+QT) | 690 | 650 | 615 | 580 | 540 |
| KV - Impact energy (J) transverse, (+QT) | -60° 27 |
-40° 27-40 |
-20° 40-60 |
0° 53-80 |
+20° 60 |
| KV - Impact energy (J) longitud., (+QT) | -40° 40 |
-30° 50 |
-20° 60 |
-10° 70 |
0° 80 |
+20° 90 |
| A - Min. elongation at fracture (%) (+QT) | 14-16 |
Additional Condition
UT(Ultrasonic examination), AR(As Hot Rolled only), TMCP(Thermal Mechanical Control Processing), N(Normalized), Q+T(Quenched and Tempered),Z Direction Test(Z15,Z25,Z35), Charpy V-Notch Impact Test, The Third Party Test (such as SGS Test), Coated or Shot Blasting and Painting.
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