A335 P91 Alloy Steel Pipe, the two digits at the beginning of the steel number indicate the carbon content of the steel, expressed in ten thousandths of the average carbon content. The main alloying elements in the steel, except for individual microalloying elements, are generally expressed in percent. When the average alloy content is less than 1.5%, only the element symbol is generally indicated in the steel grade, but the content is not indicated. The alloy elements such as vanadium V, titanium Ti, aluminum AL, boron B, rare earth RE in the steel are all microalloying elements. , although the content is very low, it should still be marked in the steel grade. High-quality high-quality steel should add "A" at the end of the steel number to distinguish it from general high-quality steel. Special purpose alloy structural steel, the steel number is prefixed with (or suffixed) the symbol representing the purpose of the steel grade.
A335 P91 is mainly used for the heating surface pipes of low and medium pressure boilers (working pressure is generally not more than 5.88Mpa, and working temperature is below 450℃); it is used for high-pressure boilers (working pressure is generally above 9.8Mpa, and working temperature is 450℃~650℃). ℃) heating surface pipes, economizers, superheaters, reheaters, pipes for petrochemical industry, etc.
Product Name | Boiler Steel Pipe |
Standard | ASTM、API、DIN、GB、JIS、bs |
Material | Carbon Steel |
Technology | Hot Rolled ,Cold Rolled,Cold Drawn,Hot Expended |
Tolerance | Control with in the standard, OD:+/-1%, WT:+/-5% |
Chemical Composition | C:0.07-0.14% Si:0.17~0.37% Mn:0.35~0.65% S≤:0.04% P≤:0.35% Cr≤:0.15% Ni≤:0.25% Cu≤:0.25% |
Mechanical Property | σb/MPa≥:335 σs/MPa≥:205 δ5(%)≥:24 |
Application | General boiler tubes are mainly used to manufacture water wall tubes, boiling water tubes, superheated steam tubes, superheated steam tubes for locomotive boilers, large and small smoke tubes and arch brick tubes, etc. |
Payment Terms | 1.FOB 30%T/T,70% Before shipment 2.CIF 30% Pre-payment , Balance must be paid before shipment 3.Irrevocable 100% L/C at sight |
Third Party Inspection | SGS ,BV, MTC |
Advantages | 1.Short delivery time 2.Quality assurance 3.Competitive price, 4.Free Sample |
Delivery Time | Within 25 days after receipt of advance payment |
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.