1. Standard
ASTM Standard：ASTM A789M2. Chemical Composition
| Elements | C | Mn | P | S | Si | Cr | Mo | Ni | N | Cu |
| Min | 21.0 | 2.5 | 4.5 | 0.08 | ||||||
| Max | 0.030 | 2.0 | 0.030 | 0.020 | 1.00 | 23.0 | 3.5 | 6.5 | 0.20 | |
| Actual value | 0.02 | 1.21 | 0.020 | 0.001 | 0.40 | 22.46 | 3.11 | 4.88 | 0.19 | 0.13 |
3. Mechanical Properties
| Mechanical Properties |
Tensile Strength MPa |
Yield Strength MPa |
Elongation % |
Hardness HBW/HRC |
| Min | 620 | 450 | 25 | |
| Max | 290/30 | |||
| Actual value | 883 | 729 | 31 | 26.0 |
4. Typical Size
| Size |
Outside Diameter Mm |
Permissible Variations in Outside Diameter mm |
Wall Thickness mm |
Average Wall Permissible Variations in Wall Thickness |
| 44×2 | 44 | ±0.25 | 2 | ±10%S |
5.Typical Application Environment
1) Pressure vessels, pressure tanks, high pressure pipe, heat exchanger (chemical processing industry).2) Oil and gas pipeline, heat exchanger pipe fittings
3) Sewage treatment system
4) Pulp and paper industry classifier, bleaching equipment and storage treatment system
5) Rotating shaft, press roll, blade, impeller, etc. under high corrosion resistance environment
6) Food processing equipment