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ASTM A335 Gr.P11 is equivalent to domestic high-speed steel. Speed steel has good process performance, good strength and toughness, so it is mainly used to manufacture complex thin-edged and impact-resistant metal cutting tools, as well as high-temperature bearings and cold extrusion dies.

In addition to the high-speed steel produced by the smelting method, powder metallurgy high-speed steel appeared after the 1960s, which has the advantage of avoiding the reduction of mechanical properties and heat treatment deformation caused by the segregation of carbides produced by the smelting method. High-speed steel is a kind of alloy steel with complex composition, which contains carbide-forming elements such as tungsten, molybdenum, chromium, vanadium, and cobalt. The total amount of alloying elements is about 10 to 25%. It can still maintain high hardness under high heat generated by high-speed cutting (about 500 ℃), and the HRC can be above 60. The most important characteristic of high-speed steel is red hardness, while carbon tool steel has high hardness at room temperature after quenching and low-temperature tempering, but when the temperature is higher than 200 ℃, the hardness drops sharply, at 500 ℃ The hardness has dropped to a level similar to the annealed state, completely losing the ability to cut metal. This limits the use of carbon tool steel to make cutting tools. Due to its good red hardness, high-speed steel makes up for the fatal shortcomings of carbon tool steel and can be used to manufacture cutting tools.

Sanitary mirror tube process:
Tube blank→inspection→peeling→inspection→heating→piercing→pickling→grinding→lubrication and air drying→welding head→cold drawing→solution treatment→pickling→pickling passivation→inspection→cold rolling→oil removal→cutting head → air drying → inner polishing → outer polishing → inspection → identification → finished product packaging
Industrial tube process
Tube blank→inspection→peeling→inspection→heating→piercing→pickling→grinding→lubrication and air drying→welding head→cold drawing→solution treatment→pickling→pickling passivation→inspection

Alloy Steel pipes have hollow sections and are widely used as pipelines for transporting fluids, such as pipelines for transporting oil, natural gas, gas, water and certain solid materials. Compared with solid steel such as round steel, alloy steel tube is lighter in weight when the bending and torsional strength is the same. Alloy steel pipe is an economical section steel, which is widely used in the manufacture of structural parts and mechanical parts, such as oil drill pipe, automobile transmission Axles, bicycle racks and steel scaffolding used in building construction, etc.

    Simply Bundled,10-100 pieces to a bundle                 Full Wrapped by water-proof material                     Full wrapped with Wooden pallet

                Container Size:20ft/40ft                                    Max loading length:5.8m,20ft/6-12m,40ft              Maximum loading weight:25 Ton

Q: Are you a manufacturer?
A: Yes , we are a seamless steel pipe  manufacturer, We have own factory, which is located in Shandong,China. We have a leading power in producing and exporting hot rolled seamless steel pipe,cold rolled seamless steel pipe,cold drawn seamless steel pipe and alloy seamless steel pipe etc. We promise that we are what you are looking for. 
Q:Can we visit your factory ?
A:Warmly welcome once we have your schedule we will pick you up .
Q: Do you have quality control?
A: Yes, we can accept BV, SGS third inspection .
Q: Can you arrange the shipment?
A: Sure, we have permanent freight forwarder who can gain the best price from most ship company and offer professional service.
Q: How long is your delivery time?
A: Generally it is 7-14 days if the goods are in stock. or it is 25-35 days if the goods are not in stock, it is according to quantity.
Q:How can we get the offer?
A:Please offer the specification of the product,such as material,size,shape,etc.So we can give the best offer.
Q:Can we get the some samples?Any charges?
A:Yes,you can get available samples in our stock.Free for real samples,but customers need to pay the freight cost.
Q: How do you make our business long-term and good relationship ?
A: 1.We keep good quality and competitive price to ensure our customers' benefit.
2.We respect every customer as our friend and we sincerely do business and make friends with them, no matter where they come from.