Application:The steel is used for upper deck or inner bottom plate as an alternative means of corrosion protection for cargo oil tanks 1.Typical Grades, Specification and Execution standard | Grade | Specification/ mm | Execution standard |
| A-RCW,B-RCW,D-RCW,E-RCW | (5~50)×(1600~4700)×L | Following IMO MSC.289(87) or CCS,NK,ABS or
"Guide for inspection of corrosion resistant steels in
crude oil tank cargo tanks" |
| AH32-RCW,DH32-RCW,EH32-RCW |
| AH36-RCW,DH36-RCW,EH36-RCW |
Delivery Condition AR or CR or TMCP
2.Chemical Composition(wt.%) | Grade | C | Si | Mn | P | S | Cr+Ni+Cu+Sb | Nb+V+Ti | Alt | Ceq |
| A~E | ≤0.18 | ≤0.35 | 0.60~1.60 | ≤0.035 | ≤0.035 | ≤1.0 | ≤0.12 | 0.020~0.060 | ≤0.36 |
| AH32~EH36 | ≤0.18 | ≤0.50 | 0.90~1.60 | ≤0.035 | ≤0.035 | ≤1.0 | ≤0.12 | 0.020~0.060 | ≤0.36
|
Note: Nb, V and Ti composite micro-alloying were adopted;
Cr, Ni, Cu and Sb are intentionally added to improve corrosion resistance;
Ceq(%)=C+Mn/6+(Cr+Mo+V)/5+(Cu+Ni)/15.
3.1Property requirement | Grade | Thickness/mm | Transverse tension | Longitudinal impact test | Average corrosion rate of base plate is mm/ years | 25 years later, the roof corrosion loss mm |
| ReH/MPa | Rm/MPa | A5/% | Temperature | average | ≤1.0 | ≤2 |
| A-RCW | 5~50 | ≥235 | 400~520 | ≥22 | 20 | ≥27 |
| B-RCW | 5~50 | 0 |
| D-RCW | 5~50 | -20 |
| E-RCW | 5~50 | -40 |
| AH32-RCW | 5~50 | ≥315 | 440~570 | ≥22 | 0 | ≥31 |
| DH32-RCW | 5~50 | -20 |
| EH32-RCW | 5~50 | -40 |
| AH36-RCW | 5~50 | ≥355 | | ≥21 | 0 | ≥34 |
| DH36-RCW | 5~50 | 490~630 | -20 |
| EH36-RCW | 5~50 | | -40 |
FAQ Q: What kind of work does your company do?
A: Our company is a professional manufacturer. We mainly produces are steel plate and steel tube.
Q: How can you assure your quality?
A: 1.We can provide you certificate of quality accordingly.
2.We are willing to accept the third party inspection, such as SGS,BV,CE and so on.
Q: Can you accept customization?
A: Yes. If you have special requirements on products or packages, we can do customization for you.
Q: Can you accept trail orders?
A: Generally our MOQ is 1 ton. But if you want to place a trail order as the beginning of our cooperation, we can accept smaller quantity at first. Surely we will have further and longer partnership after the beginning.
Q: Can you provide samples for checking before order?
A: Free samples can be provided as you required. You need only to bear the freight cost. If you want to know more details, please contact our sales online.
Q:How long time is the shortest delivery?
A:For stock material, the delivery time is just 3-5 working days.
And for customized product, it will takes 25-35 working days based on different size and quantity.
Q:What's the terms of payment?
A:We can accept T/T,100% irrevocable LC at sight, Western Union, etc,
If our quality is unapproved, we need and will refund full payment to customers
Q .How can we get your price ?
A:We need below information to quote for you:
1. Product Name
2. Standard
3. Material Grade (Chemical Composition)
4. Dimension
5. Quantity
6. The Drawing for Special Parts
