DIN 17176 25CrMo4 13CrMo44 10CrMo910 12CrMo910
| Place of Origin:Hebei China (Mainland) | Brand Name:Elite | Model Number:DIN 17176 | Type:Boiler Tube |
| No:13090521 |
DIN17176 Seamless circular steel tubes for hydrogen service at elevated temperatures and pressures
1.Field of application
This standard specifies requirements for seamless circular tubes manufactured from the steel grades.Such tubes are mainly intended for use in chemical plants for high pressure applications at service temperatures of 200oC or more and simultaneous exposure to hydrogen(e.g.boiler or heat exchanger tubes)
2.Concept
Steel for hydrogen service at elevated temperature and pressure is steel that is not readily susceptible to decarburization by hydrogen at elevated pressures and temperatures and thus to hydrogen and grain boundary embrittlement.this characteristic is achieved by adding alloying elements that from carbides at the operating temperature.
| Grade | Material number | C | Si | Mn | P max | S max | Cr | Mo | Ni | V | Others |
| 25CrMo4 1) 13CrMo4 4 10CrMo9 10 12CrMo9 10 12CrMo12 10 12CrMo19 5 X12CrMo9 1 20CrMoV13 5 X20CrMoV12 1 | 1.7216 1.7335 1.7380 1.7375 1.7381 1.7362 1.7386 1.77791.4922 | 0.22-0.29 0.10-0.18 2) 0.08-0.15 0.10-0.15 0.06-0.15 0.08-0.15 0.07-0.15 0.07-0.23 0.17-0.23 | ≤0.40 0.10-0.35 ≤0.50 ≤0.30 ≤0.50 ≤0.50 0.25-1.00 0.15-0.35 ≤0.50 | 0.60-0.90 0.40-1.00 0.40-0.70 0.30-0.80 0.30-0.60 0.30-0.60 0.30-0.60 0.30-0.50 ≤1.00 | 0.035 0.025 0.025 0.015 0.025 0.025 0.025 0.025 0.025 | 0.030 0.020 0.020 0.015 0.020 0.020 0.020 0.020 0.020 | 0.90-1.20 0.70-1.10 2.0-2.5 2.0-2.5 2.65-3.35 4.0-6.0 8.0-10.0 3.0-3.3 10.0-12.50 | 0.15-0.30 0.40-0.65 0.90-1.20 0.90-1.10 0.80-1.06 0.45-0.65 0.90-1.10 0.50-0.60 0.80-1.20 | - - - <0.30 - - - - 0.30-0.80 | - - - - - - - 0.45-0.55 0.25-0.35 | Al≥0.010,Cu<0.20 |
1)At the manufacturer’s discretion,grade 24CrMo5,material number 1.71258,may be substituted for grade 25 CrMo 4 2)For wall thicknesses not less than 30 mm,the carbon content may be up to 0.02% higher. | |||||||||||
| Packaging Detail:Bundle package |
| Delivery Detail:45days upon receipt of order |
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