09CrCuSb(ND) Seamless pipe 09MnD seamless pipe
Tianjin Yiyan Steel's main business: seamless Steel pipe , alloy tube, boiler tube, large diameter thick wall alloy tube, Tianjin large seamless tube, Tiangang, Baotou Steel, Hengyang Steel Plant, etc.
Business: seamless tubes, 27SiMn hydraulic prop tubes, 16Mn low-alloy tubes, high-pressure boiler tubes produced by Baosteel, Baotou Steel, Hengyang, Wuxi and other domestic steel plants several days ago, as well as various high-pressure alloy tubes imported from the United States, Japan, Germany and other places.
Product application range: power, petroleum, chemical industry (SH3405), transmission fluid pipe for boiler industry, high-pressure boiler pipe, medium and low-pressure boiler pipe Diesel engine High pressure seamless pipe and high pressure seamless pipe for fertilizer equipment; High pressure seamless pipe for petroleum cracking, seamless pipe for marine carbon steel and carbon manganese steel, and pipe for hydraulic prop automobile shaft sleeve. A PI Pipeline pipe, structural pipe; Hydraulic prop for coal mine Bracket Tube; Seamless stainless steel tubes for boiler heat exchangers.
Product executive standard: 09CrCuSb (ND) seamless pipe 09MnD seamless pipe
GB: GB/T5312-2009, GB/T8162-2018, GB/T8163-2018, GB3087-2008, GB/T5310-2017, GB18248-2000, GB/T6479-2013, GB/T9948-2013, GB/T17396-2009, GB/T9711.1, GB/T9711.2?, GB/T14976, GB/T14975, etc.
American standard: ASTM, ASME German standard: DIN Japanese standard: JIS
Main materials: 20 #, L245N, L290N, CCS320 Ⅰ, CCS360 Ⅰ, CCS410 Ⅰ, CCS460 Ⅰ, CCS490 Ⅰ, CCS320 Ⅱ, CCS360 Ⅱ, CCS410 Ⅱ, CCS460 Ⅱ, CCS490 Ⅱ, 35 #, 45 #, 20G, 16Mn, 16MnDG, 27SiMn, 35CrMo, 15CrMo, 15CrMo G, 12CrlMovG, 12Cr2MoG, DZ40 DZ55 J55 K55, etc.
American standard material: A106B, A106C, SA210A1, SA210C, SA213T5, T9, T11, T12, T22, T91, A333-1.6, A333-7.9 A333-3.4, A333-8, A333-G1, A333-G3 A335P11 A335P12 、A335P22 、A335P5、 A335P91。
German standard material: 17155. St45.8-III, 17175-13CrMo44, 17175-10CrMo910, 17175-17Mn4, 17175-ST45.8.
Japanese standard material: STPA22 STPA23、 STPA24、 STPA25、 STS410、 STS480、STPT410。
Related information:
09CrCuSb (ND) seamless pipe 09MnD seamless pipe
Cold drawn (rolled) seamless steel pipe:
Round tube blank → heating → piercing → heading → annealing → pickling → oiling (copper plating) → multi pass cold drawing (cold rolling) → blank tube → heat treatment → straightening → hydrostatic test (flaw detection) → marking → warehousing
mechanical property
The mechanical property of steel is an important index to ensure the end use performance (mechanical property) of steel, which depends on the chemical composition and heat treatment system of steel. In steel pipe standards, according to different use requirements, tensile properties (tensile strength, yield strength or yield point, elongation), hardness, toughness indexes, as well as high and low temperature properties required by users are specified.
① Tensile strength (σ b)
During the tensile process, the stress (σ) obtained from the original cross-sectional area (So) of the specimen due to the greater force (Fb) that the specimen bears when it is pulled off is called tensile strength (σ b), and the unit is N/mm2 (MPa). It indicates the greater ability of metal materials to resist damage under tension. The calculation formula is:
Where: Fb - the greater force that the sample bears when it is pulled off, N (Newton); So -- original cross-sectional area of the sample, mm2.
② Yield point (σ s)
For metal materials with yield phenomenon, the stress when the sample can continue to stretch without increasing the force (keeping constant) in the tensile process is called yield point. If the force decreases, the upper and lower yield points shall be distinguished. The unit of yield point is N/mm2 (MPa).
Upper yield point (σ su): the larger stress before the first drop of the force due to the yield of the sample; Lower yield point (σ sl): the smaller stress in the yield stage when the initial instantaneous effect is not considered.
The calculation formula of yield point is:
Where: Fs - yield force (constant) in the tensile process of the sample, N (Newton) So - original cross-sectional area of the sample, mm2.
③ Elongation after fracture (σ)
In the tensile test, the percentage between the increased length of the gauge length and the original gauge length after the sample is pulled off is called the elongation. It is expressed in σ and the unit is%. The calculation formula is:
Where: L1 -- gauge length of the sample after breaking, mm; L0 -- original gauge length of the sample, mm.
④ Reduction of area (ψ)
In the tensile test, the percentage between the larger reduction of the cross-sectional area at the reduced diameter and the original cross-sectional area after the sample is pulled off is called the reduction of area. Expressed in ψ, unit:%. The calculation formula is as follows:
Where: S0 -- original cross-sectional area of the sample, mm2; S1 -- less cross-sectional area of the reduced diameter after the sample is pulled off, mm2.
⑤ Hardness index
The ability of metal materials to resist the indentation of hard objects on the surface is called hardness. According to different test methods and application scope, hardness can be divided into Brinell hardness, Rockwell hardness, Vickers hardness, Shore hardness, microhardness and high-temperature hardness. There are three kinds of hardness commonly used for pipes: Brinell hardness, Rockwell hardness and Vickers hardness.
A、 Brinell hardness (HB)
Use a steel ball or carbide ball with a certain diameter to press it into the sample surface with the specified test force (F), remove the test force after the specified holding time, and measure the indentation diameter (L) of the sample surface. The Brinell hardness number is the quotient obtained by dividing the test force by the spherical surface area of the indentation. Expressed in HBS (steel ball), the unit is N/mm2 (MPa).
The calculation formula is:
Where: F - test force pressed into the surface of metal sample, N; D - diameter of steel ball for test, mm; d - average diameter of indentation, mm.
The Brinell hardness measurement is more accurate and reliable, but generally HBS is only applicable to metal materials below 450N/mm2 (MPa), not applicable to harder steel or thinner plates. In steel pipe standards, Brinell hardness is widely used. The indentation diameter d is often used to represent the hardness of the material, which is intuitive and convenient.
For example: 120HBS10/1000130: it means that the Brinell hardness value measured with a 10mm diameter steel ball under the 1000Kgf (9.807KN) test force for 30s (seconds) is 120N/mm2 (MPa). seamless steel tube
