Application:The steel is designed with low carbon content and has excellent weathering resistant performance combined with high strength a nd high toughness, easy welding and seismic performance. It can be widely used in railway and highway steel bridge construction, even without coating in some region. 1.Typical Grade, Specification and Execution Standard | Standard | Grade | Specification/mm | Delivery condition |
| GB/T714 | Q345q(D/E)NH(including Z property) | (4~100)×(1600~4700)×L | TMCP, TMCP+T |
| Q370q(D/E)NH(including Z property) |
| Q420q(D/E/F)NH(including Z property) | (6~80)×(1600~4700)×L |
| Q460q(D/E/F)NH(including Z property) |
| Q500q(D/E/F)NH(including Z property) |
| Q550q(D/E/F)NH(including Z property) |
| ASTM A709/A709M | HPS70W(F1~F3,T1~T3) | (6~100)×(1600~4700)×L | CR, TMCP, QT |
| HPS485W(F1~F3,T1~T3) |
| (including Z property) |
| HPS100W(F1~F3,T1~T3) | (6~100)×(1600~4700)×L | QT |
| HPS690W(F1~F3,T1~T3) |
| (including Z property) |
2.Chemical Composition (wt.%) | Grade | C≤ | Mn | P≤ | S≤ | Si | Nb | V | Ti | Mo≤ | Cr | Ni | Cu | N≤ | Als |
| Q345qNH | 0.11 | 1.1~ 1.50 | 0.015 | 0.006 | 0.15
~
0.50 | 0.01
~
0.100 | 0.01
~
0.100 | 0.006
~
0.030 | 0.1 | 0.4
~
0.70 | 0.3
~
0.40 | 0.25
~
0.50 | 0.008 | 0.015
~
0.050 |
| Q370qNH | 0.15 |
| Q420qNH | 0.2 |
| Q460qNH | 0.2 |
| Q500qNH | 0.25 | 0.45~ 0.70 | 0.3~ 0.45 | 0.25~ 0.55 |
| Q550qNH | 0.25 |
| A709HPS70W | 0.11 | 1.1~ 1.50 | 0.02 | 0.006 | 0.3~0.5 | / | 0.04~0.08 | / | 0.02~0.08 | 0.45~0.7 | 0.25~0.4 | 0.25~0.4 | 0.015 | 0.015~0.04 |
| A709HPS100W | 0.08 | 0.95~ 1.50 | 0.015 | 0.006 | 0.15~0.35 | / | 0.04~ 0.080 | / | 0.4~ 0.65 | 0.4~ 0.65 | 0.65~ 0.90 | 0.9~ 1.20 | 0.015 | 0.02~ 0.050 |
Note:1. Pcm (%) =C+Si/30+ (Mn+Cu+Cr)/20+Mo/15+Ni/60+V/10+5B
2. Weathering resistant index I=26.01(%Cu)+3.88(%Ni)+1.20(%Cr)+1.49(%Si)+17.28(%P)-7.29(%Cu) (%Ni)-9.10(%Ni)(%P)-33.39(%Cu)2
3.Mechanical Property Mechanical properties comply with the requirement of standard GB/T 714 or ASTM A709/A709M.
| Grade | Quality | Yield strength/MPa | Tensile strength/MPa | Elongation/% | Impact test (Longitudinal) KV2/J | Bending test D=3a,180° |
| Q345qNH | D,E | ≥345 | ≥490 | ≥20 | ≥120 | No crack |
| Q370qNH | D,E | ≥370 | ≥510 | ≥20 | ≥120 |
| Q420qNH | D,E | ≥420 | ≥540 | ≥19 | ≥120 |
| F | ≥47 |
| Q460qNH | D,E | ≥460 | ≥570 | ≥18 | ≥120 |
| F | ≥47 |
| Q500qNH | D,E | ≥500 | ≥630 | ≥18 | ≥120 |
| F | ≥47 |
| Q550qNH | D,E | ≥550 | ≥660 | ≥16 | ≥120 |
| F | ≥47 |
| A709HPS70W | T1,T2,T3 | ≥485 | | ≥19(b) | ≥34 |
| F1,F2,F3 | 585~760 | ≥48 |
| A709HPS100W | T1,T2,T3 | | | ≥18(b) | ≥48 |
| F1,F2,F3 | ≥690 | 760~895 | ≥48 |
Note:
(a)Special requirements shall be executed following the technical agreement between two parties; when the yield point is not obvious, Rp0.2 can be used to replace the lower yield strength.
(b) 50mm gauge
(c)Impact temperature
D--20ºC,E--40ºC,F--60ºC, A709HPS70W--23ºC,A709HPS100W--34ºC
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 
