 
                      Q235NH and Q295NH material introduction
Q235NH, "Q" means the letter of yield pinyin, "235" means the yield strength is 235MPa, "NH" is the letter of weather resistance.
Q235NH full name: atmospheric corrosion-resistant hot continuous rolled steel, also known as Corten steel, corrosion-resistant steel.
Widely used in: containers, power plant chimneys, railway engineering and other outdoor steels, such as large-scale outdoor sculpture steel, weathering steel (ie, atmospheric corrosion-resistant steel) is a low-cost and high-quality low-alloy steel series between ordinary steel and stainless steel.
Chemical composition of Q235NH:
| Grade | C | Si | Mn | P | S | Cu | Cr | Ni | 
| Q235NH | ≤0.13 | 0.10-0.40 | 0.20-0.60 | ≤0.030 | ≤0.030 | 0.25-0.55 | 0.40-0.80 | ≤0.65 | 
Q235NH mechanical properties:
| Grade | Yield Strength | Tensile strength Rm | Elongation after break A50mm% | 
| Q235NH | ≥235MPa | 360-510 | ≥25 | 
Q295NH, "Q" means the letter of yield pinyin, "235" means the yield strength is 235MPa, "NH" is the letter of weather resistance.
Q295NH weathering structural steel is delivered in hot-rolled, normalized and normalized and tempered state, and has the characteristics of high-quality steel such as toughness, plastic elongation, forming, welding, abrasion, and high temperature.
Q295NH mechanical properties:
| Grade | Yield Strength | Tensile strength Rm | Elongation after break A50mm% | 
| Q295NH | ≥295MPa | 410-570 | ≥24 | 
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