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Address: Suite 1004, Hongan Plaza, #258 Die Yuan Road, Yinzhou District, Ningbo City, China
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GB/T 3203 Cold Drawn Cold Rolled Seamless Steel Tube Precision Bearing Steel Tube
Carburizing is the process of ordering carbon atoms into the steel surface. It is also to make the low carbon
steel workpiece with high carbon steel surface layer, and then after quenching and low temperature tempering,
the surface layer of the workpiece has high hardness and wear resistance, and the central part of the workpiece
still maintains the toughness and plasticity of low carbon steel.
Carburizing workpiece material is generally low carbon steel or low carbon alloy steel (carbon content is less
than 0.25%). After carburizing, the chemical composition of the steel surface can be close to high carbon steel.
The workpiece carburized after quenching, in order to get high surface hardness, high wear resistance and fatigue
strength, and maintain the core of low carbon steel quenched strong shear, so that the workpiece can withstand
the impact load. Carburizing machine is widely used in aircraft, cars and tractors, such as gear, shaft, camshaft and so on.
| Product name: | GB/T 3203 Cold Drawn Cold Rolled Seamless Steel Tube Precision Bearing Steel Tube |
| Standard: | DIN17230, NF A35-565, GB/T 3203, YB-T 4146 , SKFD33 , S13000 , GOST801-78 |
| Grade: | G20CrMo, G20CrNiMo, G20CrNi2Mo, G20Cr2Ni4, Gl0CrNi3Mo, G20Cr2Mn2Mo, G23Cr2Ni2SilMo, GCr15(52100,SUJ2,SUJ3,100Cr6, SKF3S), 20CrNiMo(8620H,4118H) SKF,30Cr13 |
| Technical: | Cold Drawn Cold Rolled |
| Size Range: | OD: 5-114 mm WT: 1-14 mm Or according to customers' actual application and production. |
| Application: | automotive, electrical, instrumentation,aerospace etc. |
Chemical Composition
Chemical Composition (%) | |||||||
Steel Grade | C | Si | Mn | Cr | Ni | Mo | Cu |
G20CrMo | 0.17~0.23 | 0.20~0.35 | 0.65~0.95 | 0.35~0.65 | ≤0.30 | 0.08~0.15 | ≤0.25 |
G20CrNiMo | 0.17~0.23 | 0.15~0.40 | 0.60~0.90 | 0.35~0.65 | 0.40~0.70 | 0.15~0.30 | ≤0.25 |
G20CrNi2Mo | 0.19~0.23 | 0.25~0.40 | 0.55~0.70 | 0.45~0.65 | 1.60~2.00 | 0.20~0.30 | ≤0.25 |
G20Cr2Ni4 | 0.17~0.23 | 0.15~0.40 | 0.30~0.60 | 1.25~1.75 | 3.25~3.75 | ≤0.08 | ≤0.25 |
Gl0CrNi3Mo | 0.08~0.13 | 0.15~0.40 | 0.40~0.70 | 1.00~1.40 | 3.00~3.50 | 0.08~0.15 | ≤0.25 |
G20Cr2Mn2Mo | 0.17~0.23 | 0.15~0.40 | 1.30~1.60 | 1.70~2.00 | ≤0.30 | 0.20~0.30 | ≤0.25 |
G23Cr2Ni2SilMo | 0.20~0.25 | 1.20~1.50 | 0.20~0.40 | 1.35~1.75 | 2.20~2.60 | 0.25~0.35 | ≤0.25 |
Delivery Condition:
| Steel types | State of delivery | Code | Hardness of delivery /HBW ≤ | |
| G20Cr2Ni4 | Other grade | |||
| Hot rolled round steel | Hot rolling | WHR(or AR) | - | - |
| Hot rolling desisting | WHR+SA | 241 | 229 | |
| Forging round steel | Hot forging | WHF | - | - |
| Hot forging annealing | WHF+SA | 241 | 229 | |
| Cold-drawn round steel | Cold drawing | WCD | 241 | 229 |
| Silver round steel | Peeling or polishing | SF or SP | 241 | 229 |
Product Show:
Company Introduction:
Packing and Delivery:
Quality Control:
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.
FAQ:
Q: Are you trading company or manufacturer ?
A: A professional steel pipes materials inventor, manufacturer and solution provider
Q: How long is your delivery time?
A: Generally it is 7-14 days if the goods are in stock. or it is 30-60 days if the goods are not in stock, it is according to quantity.
Q: Do you provide samples ? is it free or extra ?
A: Yes, we could offer the sample for free charge but need pay the cost of freight.
Q: What is your terms of payment ?
A: Payment<=1000USD, 100% in advance. Payment>=1000USD, 30% T/T in advance ,balance before shippment.
If you have another question, pls feel free to contact us
GB/T 3203 Cold Drawn Cold Rolled Seamless Steel Tube Precision Bearing Steel Tube
