Sanmac® 329
UNS S32900 | EN 1.4460 | Duplex, ASTM Type 329
About
Sanmac® 329 is a duplex stainless steel with optimized sulfur content and inclusion morphology for improved machinability. The grade is characterized by:
- Excellent machinability
- High mechanical strength
- Very good resistance to pitting and stress corrosion cracking
Standards
- EN Number: 1.4460
Product standard
- EN 10088-3
- ISO 14067:2018 (CO2e)
Chemical composition (nominal)
| C | Si | Mn | P | S | Cr | Ni | Mo | N |
|---|---|---|---|---|---|---|---|---|
| ≤0.05 | ≤1.0 | ≤2.0 | ≤0.035 | ≤0.030 | 25.5 | 5 | 1.5 | 0.08 |
Applications
Sanmac® 329 is especially suited for the manufacture of components for pumps and other equipment used in, for example, alkaline environments commonly found in the pulp and paper industry.
Corrosion resistance
Sanmac® 329 has a Pitting Resistance Equivalent (PRE*) of ≥31.
*The PRE is defined as, in weight %:
PRE = % Cr + 3.3 x % Mo +16 x % N
Sanmac® 329 has very good resistance to stress corrosion cracking in chloride environments. The grade has also good resistance to general corrosion in acidic media, thanks to the high chromium content and alloying with molybdenum.
Forms of supply
Bar
Finishes and dimensions
The standard size range for bar steel in Sanmac® 329 is 75-180 mm. Round bar is supplied in the solution annealed, quenched and peel-turned condition.
Lengths
Bars are delivered in random lengths of 3-7 m, depending on diameter.
| Diameter, mm | Height of arch, mm/m Typical value |
|---|---|
| > 75 | 2 |
| Diameter, mm | Tolerances, mm |
|---|---|
| 75-95 | -0/+1.00 |
| 95-180 | -0/+1.50 |
| Surface conditions | Ra, µm Typical value |
Diameter, mm |
|---|---|---|
| Peeled and burnished | 1 | 75-180 |