Wenzhou Zheheng Steel Industry Co.,Ltd
| Payment Terms | L/C, D/P, T/T, Western Union |
| Supply Ability | 1000 Ton/Tons per Month |
| Delivery Time | 7-15 working days after receiving payment |
| Packaging Details | In wooded cases or pallets,or as for clients requirement |
| WT | SCH5-XXS |
| Size | 1/8''-24'' |
| Surface finish | Polishing, Hair line,Pickling |
| Price terms | FOB,CIF,CFR,EXW |
| Application | Industry |
| Ends | Plain/Bevelled |
| Brand Name | Zheheng |
| Model Number | TP309cb |
| Certification | ISO9001 |
| Place of Origin | Wenzhou,China |
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Product Specification
| Payment Terms | L/C, D/P, T/T, Western Union | Supply Ability | 1000 Ton/Tons per Month |
| Delivery Time | 7-15 working days after receiving payment | Packaging Details | In wooded cases or pallets,or as for clients requirement |
| WT | SCH5-XXS | Size | 1/8''-24'' |
| Surface finish | Polishing, Hair line,Pickling | Price terms | FOB,CIF,CFR,EXW |
| Application | Industry | Ends | Plain/Bevelled |
| Brand Name | Zheheng | Model Number | TP309cb |
| Certification | ISO9001 | Place of Origin | Wenzhou,China |
| High Light | TP309cb SS Seamless Pipe ，ASTM A312 SS Seamless Pipe ，Schedule 40 SS Seamless Pipe | ||
Characteristic
309Cb belongs to the Austenitic series stainless steel, containing niobium element, which can resist high-temperature oxidation, corrosion and deformation caused by thermal cycling. It has good weldability and machinability.
309Cb is widely used in petrochemical, electric power, pharmaceutical and other industries under high temperature conditions. It is often used in the manufacture of high temperature stoves, petroleum equipment and chemical equipment.
Chemical Composition
| A312 GRADES | UNS | C | Mn | P | S | Si | Cr | Ni | Mo | Nb |
| TP309Cb | S30940 | 0.08 | 2 | 0.045 | 0.03 | 1 | 22.0-24.0 | 12.0-16.0 | 0.75 | 10xC min 1.10 max |
Mechanical Properties
| Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness | |
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| 309CB | 515 | 205 | 40 | 95 | 217 |
Physical Properties
| Density (lb./ in^2) @ RT | 0.29 | |
| Modulus of Elasticity in Tension (psi x 10^6) | 29 | |
| Specific Heat (BTU/o F/lb.) | 32 to 212 oF | 0.12 |
| Thermal Conductivity (BTU/hr/ft^2/ft) | 212oF | 9 |
| 932oF | 10.8 | |
| Mean Coefficient of Thermal Expansion (in. x 10^-6 per o F) | 32 to 212oF | 8.3 |
| 32 to 600oF | 9.3 | |
| 32 to 1,000oF | 9.6 | |
| 32 to 1,200oF | 10 | |
| Electrical Resistivity (micro ohms – cm) | at 70oF | 39.8 |
| Melting Point Range (oF) | 2550 – 2650 | |
| Oxidation Resistance – Continuous Service(oF) | 2000 | |
| Oxidation Resistance – Intermittent Service(oF) | 1800 |
To improve the corrosion resistance of steel, the following measures can be taken:
(1) to form a stable passivation film on the surface of the steel. Passivation is due to the action of metal and medium to produce a thin protective film, the existence of the protective film hinders the anode process, thus improving the chemical stability of the metal. After chromium is contained in the steel, chromium is also contained in the passivation film. The higher the chromium content in the steel, the higher the chromium content in the TP309cb stainless steel tube film, which will increase the stability of the film, and its thickness is above 1nm. Therefore, the corrosion resistance of stainless steel is mainly caused by a chromium-rich oxide film with a thickness of about 1nm or more. The type of medium and other elements in the steel will affect the stability of the passivation film.
(2) The steel obtains a single solid solution structure. For example, 18Cr-8Ni austenitic stainless steel has high corrosion resistance only after solution treatment to obtain a single uniform austenitic structure
(3) Increase the electrode potential of the solid solution. The corrosion resistance of the metal is closely related to the type, concentration, temperature, pressure and other conditions of the medium, and the oxidation capacity of the medium has the greatest impact.
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Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Agent,Importer,Exporter,Trading Company
Year Established:
1995
Total Annual:
6,000,000-8,000,000
Employee Number:
100~150
Ecer Certification：
Verified Supplier
Zheheng steel is one incorporate of manufacturer, Exporter ,consultant ,stockist company specialized in the area of stainless steel tubing , pipe fittings ,Flanges and other stainless steel grade accessories . It is one-stop-shop company ,our team have more than 20 years experience in sta... Zheheng steel is one incorporate of manufacturer, Exporter ,consultant ,stockist company specialized in the area of stainless steel tubing , pipe fittings ,Flanges and other stainless steel grade accessories . It is one-stop-shop company ,our team have more than 20 years experience in sta...
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