TORICH INTERNATIONAL LIMITED
| Payment Terms | L/C, D/A, D/P, T/T, Western Union, MoneyGram |
| Supply Ability | 30000 Ton/Year |
| Delivery Time | 20 days |
| Packaging Details | Packing in wooden, hexagonal box or other seaworthy ways |
| Produce name | A 556 / 556M Cold Drawn Carbon Feedwater Heater Black Seamless Steel Pipe |
| Color | Black |
| Material | Carbon Steel Tube |
| Technique | Cold Drawing |
| Shape | Round |
| OD | 10mm-120mm |
| WT | 0.5-50mm |
| length | 1-12m |
| Brand Name | TORICH |
| Model Number | A 556 / A 556M |
| Certification | ISO9001 |
| Place of Origin | Zhejiang, China |
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Product Specification
| Payment Terms | L/C, D/A, D/P, T/T, Western Union, MoneyGram | Supply Ability | 30000 Ton/Year |
| Delivery Time | 20 days | Packaging Details | Packing in wooden, hexagonal box or other seaworthy ways |
| Produce name | A 556 / 556M Cold Drawn Carbon Feedwater Heater Black Seamless Steel Pipe | Color | Black |
| Material | Carbon Steel Tube | Technique | Cold Drawing |
| Shape | Round | OD | 10mm-120mm |
| WT | 0.5-50mm | length | 1-12m |
| Brand Name | TORICH | Model Number | A 556 / A 556M |
| Certification | ISO9001 | Place of Origin | Zhejiang, China |
| High Light | bend steel tubing ，bending steel tubing | ||
A 556 / 556M Cold Drawn Carbon Feedwater Heater Black Seamless Steel Pipe
1. Referenced Documents
1.1 ASTM Standards:
A 450/A 450M Specification for General Requirements for Carbon, Ferritic Alloy, and Austenitic Alloy Steel Tubes E 30 Test Methods for Chemical Analysis of Steel, Cast Iron, Open-Hearth Iron, and Wrought Iron
2. Manufacture
2.1 Manufacture—Tubes shall be made by the seamless process and shall be cold drawn.
2.2 Heat Treatment:
2.2.1 Cold-drawn tubes shall be heat treated after the final cold-draw pass at a temperature of 1200°[640°C] or higher to ensure ductility satisfactory for rolling into tube sheets and to meet mechanical properties as specified.
2.2.2 If stress-relief anneal of the U-bends is specified, the anneal shall consist of heating the bent portion within a range of 1100 to 1200°F [585 to 640°C].
3. Chemical Composition
3.1 The steel shall conform to one of the requirements as to chemical composition as prescribed in Table 1. 3.2 When a grade is ordered under this specification, supplying an alloy grade that specifically requires the addition of any element other than those listed for the ordered grade in
| Element | Composition, % | ||
|---|---|---|---|
| Grade A2 | Grade B2 | Grade c2 | |
| Carbon, max | 0.18 | 0.27 | 0.3 |
| Manganese | 0.27-0.63 | 0.29-0.93 | 0.29-1.06 |
| Phosphorus | 0.035 | 0.035 | 0.035 |
| Sulfur, max | 0.035 | 0.035 | 0.035 |
| Silicon, min | ... | 0.10 | 0.10 |
4. Permissible Variations in Dimensions (Fig. 1)
4.1 Permissible variations from the specified outside diametershall not exceed 0.004 in. [0.10 mm] for tubing under1.0-in. [25.4-mm] outside diameter nor 0.006 in. [0.15 mm]for tubing 1.0 in. [25.4 mm] to 1.25 in. [31.7 mm] inclusive.These tolerances do not apply to the bent portion of theU-tubes. At the bent portion of a U-tube for R = 2 D orgreater neither the major nor minor diameter of tube shalldeviate from nominal by more than 10 %. If 1 ⁄ D is specified,tolerances could be greater.
4.2 Permissible variations from the specified minimum wallthickness shall not exceed +20 % or −0. The wall thickness of
| Grade A2 | Grade B2 | Grade C2 | |
|---|---|---|---|
| Tensile strength, min, ksi [MPa] | 47[320] | 60[410] | 70[480] |
| Yield strength, min, ksi [MPa] | 26[180] | 37[260] | 40[280] |
| Elongation in 2 in. or 50 mm, min, % (longitudinal) | 35 | 30 | 30 |
| Grade A2 | HR B 72 |
|---|---|
| Grade B2 | HR B 79 |
| Grade C2 | HR B 89 |
the tube in U-bent section shall be not less than valuedetermined by:
tf T 2R / 2R D (1)
where:
t = wall thickness after bending, in. [mm],
T = specified minimum tube wall thickness, in. [mm],
R = centerline bend radius, in. [mm], and
D = nominal outside tube diameter, in. [mm].
1~ Incoming Raw Material Inspection
2~ Raw Material Segregation to avoid steel grade mix-up
3~ Heating and Hammering End for Cold Drawing
4~ Cold Drawing and Cold Rolling, on line inspection
5~ Heat Treatment, +A, +SRA, +LC, +N, Q+T
6~ Straightening-Cutting to specified length-Finished Measuring Inspection
7~ Machanical Testing in own labs with Tensile Strength, Yield Strength, Elongation, Hardness, Impact, Mictrostruture etc
8~ Packing and Stocking.
100% of our steel tubes are dimensionally checked
100% of our steel tubes are visually checked to assure they have a perfect surface condition and no surface defects.
100% eddy current test and ultrosonic test to eliminate longitudinal and transversal defects.
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Importer,Exporter,Trading Company,Seller
Year Established:
1997
Total Annual:
25000000-30000000
Employee Number:
100~200
Ecer Certification：
Verified Supplier
Who We are ? -------A professional steel pipes materials inventor, manufacturer and solution providerTorich International Limited is a professional manufacturer and exporter of steel pipes materials. It is an international marketing and sales company specialized in steel tubes, which holds the ... Who We are ? -------A professional steel pipes materials inventor, manufacturer and solution providerTorich International Limited is a professional manufacturer and exporter of steel pipes materials. It is an international marketing and sales company specialized in steel tubes, which holds the ...
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