What causes the rust phenomenon of weathering steel SMA490AP

Our company has sales department, technology department, quality inspection department, after-sales department, logistics department. Each department has professional knowledge and high professional quality, put customers first, think about the interests of customers, actively communicate with customers and solve problems smoothly.

Q690D grade is a low-alloy high-strength structural steel, belonging to the structural steel category. Q690D steel plate executive standard: GB/T16270-2009. Q is the expression of yield strength, 690 is its lower limit yield value, and D is its grade. This grade also has a higher yield strength and tensile strength. Q690 series grades also include Q690C, Q690D, Q690E, Q690F. Delivery status of steel weathering steel SMA490AP: It should be delivered in quenched and tempered state In addition, this grade can be delivered according to some special requirements of customers, but it should be indicated in the contract

Our produced Grade A normal strength shipbuilding steel are certified by CCS, BV, LR, ABS, DNV, GL, KR and NK ABA/ ABS Grade A marine steel plates are suitable for use in the construction of container ships and large cargo freighters and commercial shipping lines such as luxury cruise ships and ferries,weathering steel SMA490AP., ABS Grade A Steel Plates Size and Specification Thickness: 3~150mmWidth: 1219~3200mmLength: 2500~12000mm

weathering steel SMA490AP, 30CrMnSiA steel has good machinability, small processing deformation and good fatigue resistance. If 30CrMnSiA steel is used to make a tool, it is processed to the tool shape by rough machining. Mill the cutting edge with a cemented carbide milling cutter and polish it with a polishing machine. There should be no problem for the surface roughness reaching 3.2. 30CrMnSiA steel has high strength, sufficient toughness and good hardenability after quenching and tempering. After quenching and tempering, 30CrMnSiA steel can be used for grinding wheel shafts, gears and sprockets.

The company conducts periodic and targeted training and guidance for after-sales service personnel. As the saying goes, "no one is perfect, no gold is red", to help after-sales service personnel improve service skills and correct service attitude. Carry out relevant technical training for after-sales service personnel, so that after-sales service practitioners have professional product knowledge.

There is a silo technology R&D center in our company with many experts. Our technical backbones go abroad to study advanced technologies regularly to make our technology and products leading in the world. We provide our customers with weathering steel SMA490AP high-quality steel plates, the excellent quality from specialty. With good reputation, high-quality products, strong strength, and low prices, we welcome the clients from the world to come to visit our factory.