| GRADE | UNS NO | DIN/WERKSTOFF |
|---|---|---|
| ALLOY 28 Fittings | N08028 | 1.4563 |
| ALLOY 31 Fittings | S08031 | - |
| ALLOY 20 (WP20CB) Fittings | N08020 | - |
| ALLOY 200 (WPN) Fittings | N02200 | 2.4066 |
| ALLOY 201 (WPNL) Fittings | N02201 | 2.4068 |
| ALLOY 400 (WPNC) Fittings | N04400 | 2.4360 |
| ALLOY 600 (WPNCI) Fittings | N06600 | 2.4816 |
| ALLOY 625 (WPNCMC) Fittings | N06625 | 2.4856 |
| ALLOY 800 (WPNIC) Fittings | N08800 | 1.4876 |
| ALLOY 800H (WPNIC10) Fittings | N08810 | 1.4958 |
| ALLOY 800HT (WPNIC11) Fittings | N08811 | 1.4959 |
| ALLOY 825 (WPNICMC) Fittings | N08825 | 2.4858 |
| ALLOY C276 (WPH) Fittings | N10276 | 2.4819 |
| ALLOY C4 Fittings | N06455 | 2.4610 |
| ALLOY B2 Fittings | N10665 | 2.4617 |
| ALLOY G30 Fittings | N06030 | - |
Alloy 31 is characterized by outstanding resistance to corrosion in halide media, both acidic and basic; outstanding resistance to sulfuric acid, even highly concentrated; outstanding resistance to corrosion and erosion-corrosion in phosphoric acid media; excellent resistance to both localized corrosion and general corrosion in chlorine dioxide bleach media; excellent resistance to both reducing and oxidizing media, and ease of fabrication and welding. Approval for pressure-vessel use involving wall temperatures from -196 to 550ºC (-320 to 1020ºF).
Specifications
| Alloy 31 - UNS N08031 |
|
| Product | Norm ASTM |
| Seamless Tubes | B-622 |
| Welded Tubes | B-619 B-626 |
| Plates | B-625 |
| Bars | B-649 B-581 |
| Flanges | B-564 |
| Fittings | |
Chemical specifications %
| Alloy 31 - UNS N08031 |
||
| Element | Simbol | Maximum |
| Carbon | C | 0,015 |
| Manganese | Mn | 2,0 |
| Phosphorus | P | 0,020 |
| Sulfur | S | 0,010 |
| Silicon | Si | 0,30 |
| Nickel | Ni | 30,0-32,0 |
| Chrome | Cr | 26,0-28,0 |
| Molybdenum | Mo | 6,0-7,0 |
| Nitrogen | N | 0,15-0,25 |
| Copper | Cu | 1,0-1,4 |
| Iron | Fe | Balance |
Mechanical Properties
| Alloy 31 - UNS N08031 |
|||||||
| Norm | Rm min. | Rp 0,2% min. | E4d min.% | Z min.% | T.I.(J) | HR B | HB |
| B-564 | 94 (650) | 40 (276) | 40 | ||||
| B-581 | 94 (648) | 40 (276) | 40 | ||||
| B-619 | 94 (650) | 40 (276) | 40 | ||||
| B-622 | 100 (650) | 40 (276) | 40 | ||||
| B-625 | 94 (650) | 40 (276) | 40 | ||||
| B-626 | 94 (650) | 40 (276) | 40 | ||||
| B-649 | 94 (650) | 40 (270) | 40 | ||||
| • | Central/South America | • | North America |
| • | Asia |
• | Mid East/Africa |
| • | Western Europe |
• | Australasia |
| • | Eastern Europe |
• | UAE |
| • | Sri Lanka | • | Bahrain |
| • | Russia | • | Egypt |
| • | Portugal | • | Turkey |
| • | Spain | • | Singapore |
| • | Brazil | • | Thailand |
| • | Chile | • | Malaysia |
| • | Venezuela | • | Indonesia |
| • | Costa Rica | • | Poland |
| • | USA, U.A.E | • | Italy |
| • | Oman | • | Canada |
| • | Saudi Arabia | • | Angola |
| • | Qatar |
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