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[China]
Trade Verify
Address: Suite 1004, Hongan Plaza, #258 Die Yuan Road, Yinzhou District, Ningbo City, China
Contact name:Richard SHEN
TORICH INTERNATIONAL LIMITED |
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Verified Suppliers
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Bicycle Tubing Seamless Chromoly 4130 Steel Tube Crmo Material Alloy
| Origin | zhejiang ,China |
| Brand | Torich |
| Certificate | ISO9001 |
| Surface Treatment | Black Painted, Galvanized, Natural, Anticorrosive 3PE coated,polyurethane foam Insulation |
| OD | 6 - 124 mm |
| WT | 0.5mm-200mm |
4130 Alloy Chromoly Steel Pipe
| Chemical Composition(%) | Mechanical Property | |||||||||
| C | Si | Mn | S | P | Cr | Ni | Cu | Mo | Yield Strength | Tensile Strength |
| ( σs ) | ( σb ) | |||||||||
| 0.28~0.33 | 0.15~0.30 | 0.40~0.60 | ≤0.04 | ≤0.035 | ≤0.15 | 0.80~1.10 | / | 0.15~0.25 | ≥785(80) (MPa) | ≥930(95) |
| (MPa) | ||||||||||
| End Shape | Beveled end, plain end, vanished, or adding plastic caps to protect the two ends as per customer's requirements | |||||||||
| Surface | Oiled, Galvanized, Phosphate etc | |||||||||
| Treatment | ||||||||||
| Technique | Cold drawn | |||||||||
| Application | 1. Automotive and mechanical pipes | |||||||||
| 2. Petroleum cracking pipes | ||||||||||
| 3. High Pressure Boiler Pipe | ||||||||||
| 4. Low and middle pressure fluid transportation pipeline | ||||||||||
| 5. Chemical fertilizer equipment pipes | ||||||||||
| 6. Heat exchanger pipes | ||||||||||
| Delivery | 1. BK (+C) | No heat treatment after last cold forming process. | ||||||||
| Conditions | 2. BKW (+LC) | After last heat treatment there is a light finishing pass (cold drawing) | ||||||||
| 3. BKS (+SR) | After the final cold forming process the tubes are stress relieve annealed. | |||||||||
| 4. GBK (+A) | After the final cold forming process the tubes are annealed in a controlled atmosphere. | |||||||||
| 5. NBK (+N) | After the final cold forming process the tubes are annealed above the upper transformation point in acontrolled atmosphere. | |||||||||
Chromoly Steel process
Chromium alloy billet can be made by smelting or powder metallurgy.
Because of its
high vapor pressure, chromium needs inert gas protection during smelting. High quality
ingot can be obtained by smelting electrolytic chromium refined by chromium iodide or
hydrogen and adding alloying elements. Dispersion - strengthened alloys can be obtained
by adding dispersion - phase compounds directly to chromium by powder metallurgy.
Plastic processing can be extruded, and then forged or rolled, the use of mild steel cladding
to facilitate deformation, after processing with pickling removal of steel sleeve. Some
chromium alloy targets can also be formed by hot isostatic pressing
