Technical Requirements & Additional Services for P500QL2 steel plate:
♦ High tension test
♦ Low temperature impacting test
♦ Simulated post-welded heat treatment (PWHT)
♦ Ultrasonic test under EN 10160,ASTM A435,A577,A578
♦ Issued Orginal Mill test certificate under EN 10204 FORMAT 3.1/3.2
♦ Shot blasting and Painting,Cutting and welding as per end user's demands
►Mechnical property for P500QL2 steel plate:
| Thickness (mm) | |||
| P500QL2 | ≤ 50 | > 50 ≤ 100 | > 100 |
| Yield strength (≥Mpa) | 500 | 480 | 440 |
| ≤ 100 | > 100 | ||
| Tensile strength (Mpa) | 590-770 | 540-720 | |
►Chemical composition for P500QL2 steel plate (Heat Analysis Max%)
| Main chemical elements composition of P500QL2 steel plate | |||||||
| C | Si | Mn | P | S | B | N | Cr |
| 0.18 | 0.60 | 1.70 | 0.020 | 0.010 | 0.005 | 0.015 | 1.00 |
| Cu | Mo | Nb | Ni | Ti | V | Zr | |
| 0.30 | 0.70 | 0.05 | 1.50 | 0.05 | 0.08 | 0.15 | |
FAQ
1. What welding procedures are recommended?
Answer:
Standard Welding Protocol:
Preheat: 200-250°C (for t>25mm)
Consumables: EN ISO 16834-A G 62 5 M21 4Ni1.5Mo
Heat Input: 1.5-2.5 kJ/mm
Interpass Temp: 200-250°C
PWHT: 610-630°C × 1hr/25mm (for t>40mm)
Testing: Impact at -40°C
Special Notes:
• No buttering layer required for standard applications
• Hydrogen control <5ml/100g sufficient
• Hardness surveys only for thickness >75mm
2. When should engineers specify P500QL2?
Answer:
Ideal for:
✔ Industrial gas storage (-40°C)
✔ LPG processing vessels
✔ Cost-sensitive cryogenic projects
✔ Thickness range 20-120mm
Not recommended for:
✖ LNG primary containment (-162°C)
✖ Fracture-critical designs needing -60°C toughness
✖ Sour service without supplemental testing
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