Application:The steel is used for bridges, buildings, offshore trestle bridge, submarine tunnel, airport, special pier and other steel structures in coastal areas. 1.Typical Grades, Specification and Execution Standard | Grade | Specifications/mm | Execution Standard |
| Q355NH-BH | (5~60)×(1600~4700)×L | Mechanical performance complies with the requirements of GB/T4171, corrosion resistance complies with technical agreements |
| Q415NH-BH |
| Q460NH-BH |
2.Chemical Composition(wt.%) | C | Si | Mn | F | S | Nb+Ti
+V | Ni+Cu
+Cr+Mo | Ceq | Pcm |
| ≤0.12 | ≤0.35 | ≤1.50 | ≤0.035 | ≤0.005 | ≤0.06 | 2.0~7.0 | ≤0.43 | ≤0.20 |
Note: 1. Ceq(%)=C+Mn/6+(Cr+Mo+V)/5+(Cu+Ni)/15
2. Pcm(%)=C+Si/30+(Mn+Cu+Cr)/20+Mo/15+Ni/60+V/10+5B
3.Property requirement | Grade | Transverse tension | KV2 (-40ºC)
/ J Longitudinal impact test | Corrosion rate g/(m2·h) |
| ReL/MPa | Rm /MPa | A5 /% | | |
| ≤16 | >16
~40 | >40
~60 | ≤16 | >16
~40 | >40
~60 |
| Q355NH-BH | ≥355 | ≥345 | ≥335 | 490~630 | ≥22 | ≥22 | ≥21 | ≥34 | ≤0.91 |
| Q415NH-BH | ≥415 | ≥405 | ≥395 | 520~680 | ≥22 | ≥22 | ≥20 |
| Q460NH-BH | ≥460 | ≥450 | ≥440 | 570~730 | ≥20 | ≥20 | ≥19 |
Note: corrosion test by periodic infiltration corrosion evaluation method, infiltration solution is 1%NaCl+0.1%NaHSO3, the test temperature is 45 + 2ºC, humidity is 70 + 5%RH, dry wet cycle is 60 + 3min, the soaking time is 12 + 1.5min.
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 
