What is 1.4477 material ?
1.4477 material is a super duplex stainless steel (chemical designation X2CrNiMoN29-7-2) known for its high strength and excellent corrosion resistance, particularly in harsh environments with chlorides. It is suitable for demanding applications like offshore structures, chemical processing, and desalination plants.
What is equivalent to 1.4477stainless steel?
The stainless steel grade EN 1.4477 (X2CrNiMoN29-7-2) is equivalent to UNS S32906 and AISI 329 (S32900). These are all designations for a high-performance, wrought duplex stainless steel that offers high tensile strength and good corrosion resistance.
EN 1.4477 Stainless Steel Chemical composition
| Elements not listed in this table shall not be intentionally added to the steel without the agreement of the purchaser except for finishing the cast. | |||||||||
| C | Si | Mn | Ni | P | S | Cr | Mo | N | Cu |
| max 0.03 | max 0.5 | 0.8 - 1.5 | 5.8 - 7.5 | max 0.03 | max 0.015 | 28 - 30 | 1.5 - 2.6 | 0.3 - 0.4 | max 0.8 |
1.4477 Stainless Steel Mechanical properties
| Yield Rp0.2(MPa) |
Tensile Rm(MPa) |
Impact KV/Ku J |
Elongation A(%) |
Reduction in cross section on fracture Z (%) |
As-Heat-Treated Condition | Brinell hardness (HBW) |
| 165 (≥) | 198 (≥) | 21 | 34 | 14 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 144 |
1.4477 Stainless Steel Physical properties
| Temperature (°C) |
Modulus of elasticity (GPa) |
Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and | Thermal conductivity (W/m·°C) |
Specific thermal capacity (J/kg·°C) |
Specific electrical resistivity (Ω mm²/m) |
Density (kg/dm³) |
Poisson’s coefficient, ν |
| 24 | - | - | 0.12 | - | |||
| 661 | 217 | - | 12.3 | 332 | - | ||
| 495 | - | 23 | 13.2 | 341 | 411 |
EN 1.4477 stainless steel corrosion resistance：
EN 1.4477 stainless steel is a super austenitic stainless steel with exceptional corrosion resistance, especially in chloride media (such as seawater and brine). It combines high chromium, high nickel, and high molybdenum content, thus exhibiting excellent resistance to pitting and crevice corrosion in a variety of harsh environments. This corrosion resistance is due to its compositional design, which effectively inhibits corrosion reactions.
EN 1.4477 stainless steel strength：
In the annealed (+A) condition, EN 1.4477 stainless steel has a tensile strength (Rm) of 750-1050 MPa, a 0.2% yield strength (Rp0.2) of 550-650 MPa, and a Brinell hardness (HB) of 310. Furthermore, its longitudinal impact energy (KV) at +20°C is 100 J, and its minimum elongation at break (A) is 20-25%.
EN 1.4477 stainless steel weldability:
EN 1.4477 stainless steel has good weldability and is typically welded using methods such as manual welding, MIG/MAG welding, and TIG welding. During welding, care should be taken to control heat input to avoid the risk of weld cracks and intergranular corrosion, and suitable welding rods or wires should be selected to maintain the corrosion resistance of the weld.
If you have project requirements for 1.4477 stainless steel bars, please feel free to place an order. GNEE has a large inventory of popular products for your selection. They can be processed into various practical product forms, including plates, coils, pipes, bars, and wires. For detailed chemical composition and free samples, please contact our factory immediately. We offer competitive prices and excellent service.
