What are the defects in the production of A514 Gr B steel material

For S420NL weldable fine grain structural steel plate, it is produced under specification EN 10025-3. The yield strength of S420NL plate shall be above 420Mpa for the thickness below 16 millimeter, 400MPa min. for thickness below 40mm, 390MPa min. for thickness below 63mm. The tensile strength for thickness below 100mm of this steel grade S420NL shall be within 520-680Mpa. For the Mill test certificates of steel S420NL,A514 Gr B steel material, our mill would like to issue format according to EN 10204 3.1.

The company has always adhered to the principle of "genuine goods at low prices", put an end to the sale of fake and shoddy A514 Gr B steel material products, do not deceive customers, treat customers in good faith, truly consider for customers and give advice. To provide reference opinions, and to treat customers with integrity. Consequently, we have won a lot of A514 Gr B steel material stable cooperated customers over the years in the international market. Our steel materials are widely used in power stations, bridges, ship manufacturing, offshore platforms, heavy machinery, oil and gas pipelines, tanks and so on fields.

Welding is mainly used for manufacturing metal structure parts, and also for manufacturing machine parts. The welding connection performance is good, and it is convenient to weld A514 Gr B steel material steel plates, profiles or castings and forgings according to the needs. At the same time, welding can also connect different shapes and sizes (plate thickness, pipe diameter) or even different materials, so as to reduce weight, save materials, optimize resources and other purposes. The welding structure has high rigidity, good integrity, and easy to ensure air tightness and water tightness, so it is especially suitable for A514 Gr B steel material manufacturing hollow structures with high strength and large rigidity (such as pressure vessels, pipes, boilers, etc.).

The alloying principle of low alloy high strength steel is mainly to improve the strength of steel by solid volume strengthening, fine grain strengthening and precipitation strengthening produced by alloy elements. At the same time, the effect of reducing the ductile brittle transition temperature of steel by fine grain strengthening is used to counteract the adverse effect of carbon nitride precipitation strengthening on the rise of ductile brittle transition temperature of steel, so that the A514 Gr B steel material, low alloy high strength steel can obtain high strength while maintaining good low temperature performance.

Our company will accept the product quality objection registration record, pass it to the A514 Gr B steel material production unit and relevant departments, and timely coordinate the supervision of product A514 Gr B steel material quality objection. Our company coordinates the relevant department personnel to the customer unit to carry on the investigation, the processing.