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DIN17175 ST45.8 Cold drawn seamless heat exchanger tube 33.4*3.38
DIN17175 St35.8Heat seamless steel pipe is used for the high-pressure boiler (working pressure generally above 9.8 Mpa, working temperature between 450 ℃ ~ 650 ℃) of the heating surface pipe, economizer, superheater, reheater tube, petrochemical industry, etc.
DIN 17175 steel pipes are used in boiler installations, high-pressure pipelines and tank construction, and special machinery for both high temperature and high-pressure devices.
Surface treatment: Oil-dip, Varnish, Passivation, Phosphating, Shot Blasting.
Chemical Composition
| Standard | Grade | Chemical Components (%) | ||||||
| C | Si | Mn | P | S | Mo | Cr | ||
| DIN17175 | St 35.8 | ≤0.17 | 0.10-0.35 | 0.40-0.80 | ≤0.040 | ≤0.040 | / | / |
| St 45.8 | ≤0.17 | 0.10-0.35 | 0.40-0.80 | ≤0.040 | ≤0.040 | / | / | |
| 15Mo3 | 0.12-0.20 | 0.10-0.35 | 0.40-0.80 | ≤0.035 | ≤0.035 | 0.25-0.35 | / | |
| 13CrMo44 | 0.10-0.18 | 0.10-0.35 | 0.40-0.70 | ≤0.035 | ≤0.035 | 0.45-0.65 | 0.70-1.10 | |
| 10CrMo910 | 0.08-0.15 | ≤0.50 | 0.40-0.70 | ≤0.035 | ≤0.035 | 0.90-1.20 | 2.0-2.50 | |
| Standard | Grade | Mechanical properties | ||
| Tensile Strength (Mpa) | Yield Strength (Mpa) | Elongation (%) | ||
| DIN17175 | St 35.8 | 360-480 | ≥235 | ≥25 |
| St 45.8 | 410-530 | ≥255 | ≥21 | |
| 15Mo3 | 450-600 | ≥270 | ≥22 | |
| 13CrMo44 | 440-580 | ≥290 | ≥22 | |
| 10CrMo910 | 450-600 | ≥280 | ≥20 | |
