TORICH 37Mn 30CrMo Seamless Steel Tube for Gas Cylinder GB/T18248
| Standard | GB/T18248 |
| Material | 37Mn, 34Mn2V, 30CrMo, 35CrMo, 34CrMo4, 30CrMnSiA |
| Size | OD: 15-800mm WT: 1.6-50 Length: 4-12m |
| Techinique | Hot Rolled or Cold Drawn |
| Delivery Condition | Hot Rolled Steel Tube: Hot Rolled Cold Drawn Steel Tube: Cold Drawn, Annealed or Normalizing |
| Test | Tensile Test, Impact Test, Hydraulic Test, Eddy Current Test, Ultrasonic Testing etc |
| Application | Low and Medium Pressure Boiler |
Chemical Requirements
| Element | 37Mn | 34Mn2V | 30CrMo | 35CrMo | 34CrMo4 | 30CrMnSiA |
| C | 0.34-0.40 | 0.30-0.37 | 0.26-0.34 | 0.32-0.40 | 0.30-0.37 | 0.28-0.34 |
| Si | 0.10-0.30 | 0.17-0.37 | 0.17-0.37 | 0.17-0.37 | ≤0.40 | 0.90-1.20 |
| Mn | 1.35-1.75 | 1.40-1.75 | 0.40-0.70 | 0.40-0.70 | 0.60-0.90 | 0.80-1.10 |
| P | ≤0.020 | ≤0.020 | ≤0.020 | ≤0.020 | ≤0.020 | ≤0.020 |
| S | ≤0.020 | ≤0.020 | ≤0.020 | ≤0.020 | ≤0.020 | ≤0.020 |
| P+S | ≤0.030 | ≤0.030 | ≤0.030 | ≤0.030 | ≤0.030 | ≤0.030 |
| Cr | ≤0.30 | ≤0.30 | 0.80-1.10 | 0.80-1.10 | 0.90-1.20 | 0.80-1.10 |
| Mo | - | - | 0.15-0.25 | 0.15-0.25 | 0.15-0.30 | ≤0.10 |
| V | - | 0.07-0.12 | - | - | - | - |
| Ni | ≤0.30 | ≤0.30 | ≤0.30 | ≤0.30 | ≤0.30 | ≤0.30 |
| Cu | ≤0.20 | ≤0.20 | ≤0.20 | ≤0.20 | ≤0.20 | ≤0.20 |
Permissible Variations
| Type | Size Range | Permissible Variations in OD % | Permissible Variations in WT % | Permissible Variations in Minimum WT % | ||
| Common Level | High Level | PA | PC | |||
| Hot Rolled | D<339.7 mm | ±1 | +12.5 -10 | ±10 | +25 0 | +22.5 0 |
| D≥339.7 mm | +15 -12.5 | +12.5 -10 | +30 0 | +25 0 | ||
| Cold Drawn | All | ±0.75 | ±10 | ±7.5 | +22.5 0 | +15 0 |
| Grade | Tensile Strength MPa | Yeild Strength MPa | Elongation % |
| min | |||
| 37Mn | 750 | 630 | 16 |
| 34Mn2V | 745 | 530 | 16 |
| 30CrMo | 930 | 785 | 12 |
| 35CrMo | 980 | 835 | 12 |
| 34CrMo4 | 980 | 835 | 12 |
| 30CrMnSiA | 1080 | 885 | 10 |
Product Show
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.
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 of carbon seamless steel tube ? 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
TORICH GB/T3087 Seamless Steel Tube for Low and Medium Pressure Boiler
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.