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Model No.: ASME SA213 TP310S Stainless Steel Seamless Tube
Applications of Grade 310/310S Stainless Steel
Typical Applications Grade 310/310S is used in fluidised bed combustors, kilns, radiant tubes, tube hangers for petroleum refining and steam boilers, coal gasifier internal components, lead pots, thermowells, refractory anchor bolts, burners and combustion chambers, retorts, muffles, annealing covers, saggers, food processing equipment, cryogenic structures.
Properties of Grade 310/310S Stainless Steel
These grades contain 25% chromium and 20% nickel, making them highly resistant to oxidation and corrosion. Grade 310S is a lower carbon version, less prone to embrittlement and sensitisation in service. The high chromium and medium nickel content make these steels capable for applications in reducing sulphur atmospheres containing H2S. They are widely used in moderately carburising atmospheres, as encountered in petrochemical environments. For more severe carburising atmospheres other heat resisting alloys should be selected. Grade 310 is not recommended for frequent liquid quenching as it suffers from thermal shock. The grade is often used in cryogenic applications, due to its toughness and low magnetic permeability.
In common with other austenitic stainless steels, these grades cannot be hardened by heat treatment. They can be hardened by cold work, but this is rarely practiced.
Chemcial Composition of Grade 310/310S Stainless Steel.
The chemical composition of grade 310 and grade 310S stainless steel are summarised in the following table.
Table 1. Chemical composition % of grade 310 and 310S stainless steel
|Carbon||0.25 max||0.08 max|
|Manganese||2.00 max||2.00 max|
|Silicon||1.50 max||1.50 max|
|Phosphorus||0.045 max||0.045 max|
|Sulphur||0.030 max||0.030 max|
|Chromium||24.00 – 26.00||24.00 – 26.00|
|Nickel||19.00 – 22.00||19.00 – 22.00|
Mechanical Properties of Grade 310/310S Stainless Steel
The mechanical properties of grade 310 and grade 310S stainless steel are summarised in the following table.
Table 2. Mechanical properties of of grade 310/310S stainless steel
|Mechanical Properties||310/ 310S|
|Grade 0.2 % Proof Stress MPa (min)||205|
|Tensile Strength MPa (min)||520|
|Elongation % (min)||40|
|Hardness (HV) (max)||225|
Physical Properties of Ferritic Stainless Steel
The physical properties of grade 310 and grade 310S stainless steel are summarised in the following table.
Table 3. Physical properties of grade 310/310S stainless steel
|Electrical Resistivity||25°C||0.78||Micro ohm.m|
|Modulus of Elasticity||20°C||200||GPa|
|Relative Magnetic Permeability||1.02|
|Coefficient of Expansion||0-100°C||15.9||/°C|
Fabrication of Grade 310/310S Stainless Steel
Fabrication Grades 310/310S are forged in the temperature range 975 – 1175°C. Heavy work is carried out down to 1050°Cand a light finish is applied to the bottom of the range. After forging annealing is recommended to relieve all stresses from the forging process. The alloys can be readily cold formed by standard methods and equipment.
Machinability of Grade 310/310S Stainless Steel
Machinability Grades 310/310SS are similar in machinability to type 304. Work hardening can be a problem and it is normal to remove the work hardened layer by using slow speeds and heavy cuts, with sharp tools and good lubrication. Powerful machines and heavy, rigid tools are used.
Heat Treatment of Grade 310/310S Stainless Steel
Heat Treatment Type 310/310S are solution annealed by heating to temperature range 1040 -1065°C, holding at temperature until thoroughly soaked, then water quenching.
Heat Resistance of Grade 310/310S Stainless Steel
Grades 310/310S have good resistance to oxidation in intermittent service in air up to 1035°Cand 1050°C in continuous service. The grades are resistant to oxidation, sulphidation and carburisation.
Available Forms of Grade 310/310S Stainless Steel
Austral Wright Metals can supply these grades as plate, sheet and strip, bar and rod, seamless tube and pipe, welded tube and pipe, forgings and forging billet, tube and pipe fittings, wire. Corrosion Resistance Grade 310/310S is generally not used for corrosive liquid service, although the high chromium and nickel content give corrosion resistance superior to grade 304. The alloy does not contain molybdenum, so pitting resistance is quite poor. Grade 310/310S will be sensitised to intergranular corrosion after service at temperatures in range 550 – 800°C. Chloride stress corrosion cracking may take place in corrosive liquids containing chlorides at temperatures exceeding 100°C.
Yuhong Group Co.,Limited is one of the largest Procurement Engineering and Contracting Group companies in China. Our group branch company and factory have been already approved by : ABS, DNV, GL, BV, PED 97/23/EC, AD2000-WO, GOST9941-81, CCS, TS, CNNC, ISO9001-2008, ISO 14001-2004. Yuhong Group has expanded its field of activities and entered in trade and supply of tubular & flat products in Stainless Steel, Carnon steel, Alloy Steel as well as a series of special materials for our reputed clients worldwide. These products are widely used in various important sectors like Mining, Energy, Petrochemical, Chemical Industry, Food Plant, Paper Plant, Gas and Fluid Industry etc.
Yuhong Group has gained rich experience in Pipes, Fittings, Flanges, Valves, Structural steel, Coils and Plates in past seven years. In a short span of time, Yuhong Group has marked its global presence in more than 30 countries. We have successfully implemented the orders of Cross Country Pipelines for our valuable customers. In addition, we have also developed a huge network of contacts and strategic alliances with most important manufacturers an stockists around the world.
It allows us to offer highly competitive solutions with certified quality, complying with high standard of today's industry. In the supply chain of Yuhong Group,Stainless Steel Pipe and Tube, which are produces by our factories : Zhejiang Yuhongwell Steel Co.,Ltd , Zhejiang Zhongwu Tube Manufacturing Co.,Ltd , Jiangsu New Zhongzhou Special Alloy Materials Co.,Ltd etc. And all of other products' suppliers are approved by our QC department. About Stainless Steel Fittings & Flanges, our suppliers are approved by PED, AD2000, DNV, ABS, TS, GL, LR, KR, GOST, NK, etc. Similarly in Carbon steel pipe/tube/fitting, our suppliers are approved by API5L, API 5CT,API 5D, PED etc. When we place the order, it is our practice to follow the order start from raw material. After getting the material ready, our QC people make strict inspection again before loading the material. We will follow the whole processing of producing, marking ,packing and inspection before deliver to customer.