Application and heat treatment of S690Q steel

Since the beginning of this year, the global S690Q steel steel pipe industry, like many other industries, is facing severe market situation. The difference is that novel coronavirus pneumonia is not only affected by the epidemic, but also closely linked to the oil and gas industry, and the global S690Q steel steel tube industry will also suffer from the "flash collapse" of international oil prices in March.

Our after sales department is an very important part of our department structures. After the customer receive steel materials, our after sales department will follow up regularly and solve problems for them in time if they have the needs. We romise to return the goods for free for its lifetime if it is quality of the steel material itself. Meanwhile, if you have any advice or complaints, also welcome to feed back to our after sales department, and we are trying to give better service to you.

Our S690Q steel, CCS AH32 shipbuilding steel plates stock and specification (mm): 14.5*2450*5410, 14.5*4180*7500, 25.5*4210*6870, 14.5*2950*6570, 15.5*2200*7080, 15*2200*6720, 13*2190*8000, 21.5*1500*5480, 20.5*1500*6530, 11*2060*7550, 25.5*4230*7020, 16.5*2020*6180, 23*4210*5620, 23*4160*7310, 15*2430*11560, 15*2180*6720, 18.5*2450*7990, 11*3070*9200, 18.5*2800*7180, 23*3800*7100, 13*2610*8190, 13*1600*6900, 28*2330*5420, 17.5*2440*6220, 12.5*1630*5000, 13*1600*7390.

The difference of chemical composition between S690Q steel, Q420D steel and Q460D steel:
Chemical composition of Q420D steel: C ≤ 0.20, Si ≤ 0.50, Mn ≤ 1.70, P ≤ 0.030, S ≤ 0.025, Nb ≤ 0.07, V ≤ 0.20, Ti ≤ 0.20, Cr ≤ 0.30, Ni ≤ 0.80, Cu ≤ 0.30, N ≤ 0.015, Mo ≤ 0.20, Al ≥ 0.015. Chemical composition of Q460D steel: C ≤ 0.20, Si ≤ 0.60, Mn ≤ 1.80, P ≤ 0.030, S ≤ 0.025, Nb ≤ 0.11, V ≤ 0.20, Ti ≤ 0.20, Cr ≤ 0.30, Ni ≤ 0.80, Cu ≤ 0.55, N ≤ 0.015, Mo ≤ 0.20, B ≤ 0.004, Al ≥ 0.015.
The difference of mechanical properties between S690Q steel, Q420D steel and Q460D steel:
The mechanical properties of Q420D steel: yield strength ≥ 420 MPa, tensile strength 500-680 MPa. The mechanical properties of Q460D steel: yield strength ≥ 460 MPa, tensile strength 500-720 MPa.

We have built solid cooperation with Myanmar Navy since 2015, starting from a try order about 412 tons LR AH36 shipbuilding steel plates. Myanmar navy builds frigate every year and book shipbuilding steel materials from us regularly. This time, the Myanmar navy’s local representative visit us and put another order about 2025 tons LR grade A steel plates. According to clients requirements, we arranged S690Q steel SGS inspection for the LR grade A steel plates before shipping and send them inspection report.

Hot rolled plates are known for their superior mechanical properties over commodity grades of merchant bar. The hot rolled S690Q steel plates products are made to specific chemistry and mechanical properties ranges, allowing them to be used in engineered applications. Resulting shafts, axles, and gears can be used in the automotive S690Q steel industry and agriculture equipment. A36 mild steel has good strength, formability, and excellent welding properties. We also can supply welding, fabricating, and bending service.