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 2.Chemical Composition(wt.%)
|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 |
|C ||Si ||Mn ||F ||S ||Nb+Ti |
|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 |
|≤16 ||>16 |
|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. Manufacturing process 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
3. Material Grade (Chemical Composition)
6. The Drawing for Special Parts