Nace Mr0175 Duplex 2205 Pipe ASTM A790 Material High Mechanical Strength
Production Name : Seamless Duplex Stainless Steel Pipe Standard : ASTM A790 Material : S31803 NACE MR0175
MATERIAL DESCRIPTION
Duplex UNS S31803 is the most common duplex grade in the market. It has very good resistance to localized corrosion and stress corrosion cracking in combination with high mechanical strength. It is widely used in oil & gas, hydro power, pressure vessels, pulp & paper, structural components and chemical tankers. The alloy is not intended to be used at temperatures above 300°C due to embrittlement.
CHEMICAL COMPOSITION
| WEIGHT% | C | SI | MN | S | P | CR | NI | MO | N |
| MIN. | 21,00 | 4,50 | 2,50 | 0,10 | |||||
| MAX. | 0,030 | 1,00 | 2,00 | 0,015 | 0,030 | 23,00 | 6,50 | 3,50 | 0,22 |
NORSOK: N: 0,14 – 0,20%
PRODUCT STANDARDS: EN 10088-3, ASTM A276, ASTM A479, ASTM A182–11A (CHEMICAL COMPOSITION AND MECHANICAL PROPERTIES ONLY)
APPROVALS: NACE MR0175, NORSOK M650, NORSOK M630 MDS D41/D43/ D44/ D45/ D47
APPLICATIONS
The main applications are for details with special requirements for high corrosion resistance.
S31803 is characterized by:
• High resistance to stress corrosion cracking in halide containing environments.
• High resistance to pitting and crevice corrosion.
• High resistance to general corrosion.
• High mechanical strength.
• High resistance to erosion corrosion and corrosion fatigue.
MECHANICAL PROPERTIES
| YIELD STRENGTH RP0.2 MPA | TENSILE STRENGTH RM MPA | ELONGATION [%] | HARDNESS [HB] | IMPACT, CHARPY-V, -46ºC [J] | PRE | |
| BAR | ≥ 450 | 650 – 880 | ≥ 25 | ≤ 270 | ≥ 45 | ≥ 33 |
| PLATE, CR | ≥ 500 | 700 – 950 | ≥ 20 | ≥ 45 | ≥ 33 | |
| PLATE, HR | ≥ 460 | 640 – 840 | ≥ 25 | ≥ 45 | ≥ 33 |
HEAT TREATMENT
Solution annealing at 1020 – 1100°C followed by water quenching.
WELDABILITY
Very good.
| UNS | TYPE | AMS | ASTM | FEDERAL | CHARACTERISTICS |
|---|---|---|---|---|---|
| S31803/S32205 | Duplex | – – | A-276 A-479 | – | Roughly double the strength of standard austenitic stainless steels, designed to improve resistance in many applications such as chloride environments and sulfide stress corrosion. |
| C | MN | P | S | SI | CR | NI | MO | CU | OTHER | M/NM |
|---|---|---|---|---|---|---|---|---|---|---|
| .03 | 2. | .03 | .02 | 1. | 21. – 23. | 4.5 – 6.5 | 2.5 – 3.5 | N .08 – .2 | INQUIRE |
Seamless Duplex Stainless Steel Pipe Pictures
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