APM 2377, UNS S31803


Catalog excerpts

APM 2377, UNS S31803 - 1

APM 2377, UNS S31803 HOT ISOSTATIC PRESSED (HIP) PRODUCTS DATASHEET APM 2377 is a powder metallurgical duplex (austenitic-ferritic) stainless steel manufactured by Hot Isostatic Pressing (HIP). It is characterized by high strength and good corrosion resistance. Applications include for example offshore components. STANDARDS - UNS: S31803, S32205 - EN Number: 1.4462 Approvals - NACE MR0175/ISO 15156 - ASME B31.3 - APM 2377 supplied by Sandvik is qualified according to NORSOK M650 D44 CHEMICAL COMPOSITION (NOMINAL) % Chemical composition (nominal) % C Cr Mo Ni N Datasheet updated 6/20/2017 1:34:45 PM (supersedes all previous editions) FORMS OF SUPPLY Components can be supplied in a wide range of dimensions and shapes thanks to the flexibility provided by powder metallurgy and near net shape technology. The products are supplied in the solution annealed and water quenched condition. APPLICATIONS Thanks to its excellent corrosion properties, APM 2377 is a highly suitable material for service in environments containing chlorides and hydrogen sulphide. The material is suitable for topside and subsea offshore components, such as valve bodies, manifolds, swivels and headers. The steel is also suitable for use in dilute sulphuric acid solutions and for handling organic acids, e.g. acetic acid and mixtures. The high strength of APM 2377 makes the material an attractive alternative to austenitic steels in structures subjected to heavy loads. The good mechanical and corrosion properties make APM 2377 an economical choice in many applications by reducing the life cycle cost of equipment. MECHANICAL PROPERTIES

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APM 2377, UNS S31803 - 2

Mechanical properties at 20°C (68°F) Minimum* Typical * Minimum values according to ASTM 988 Impact toughness values valid for wall thickness up to 325mm (round bar) at T/4. Proof strength at elevated temperatures Temperature PHYSICAL PROPERTIES Density: 7.8 g/cm3, 0.28 lb/in3 Mean coefficient of thermal expansion, 20-100°C: 13.5x10-6/°C Modulus of elasticity* Temperature, °C MPa Temperature, °F ksi * (x103) MICROSTRUCTURE Hot isostatic pressed components have isotropic properties, meaning the mechanical properties are similar in all directions. Datasheet updated 6/20/2017...

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APM 2377, UNS S31803 - 3

Fine isotropic microstructure of HIPed material vs. forged bar. CORROSION RESISTANCE In most media, APM 2377 possesses better resistance to general corrosion than steel of type ASTM 316L and 317L. Pitting corrosion Thanks to the high contents of chromium, molybdenum and nitrogen APM 2377 has good pitting and crevice corrosion resistance. A parameter for comparing the resistance of different steels to pitting corrosion is the PRE number (Pitting Resistance Equivalent). The PRE is defined as, in weight-%: PRE = % Cr + 3.3 x % Mo + 16 x % N. The critical pitting temperature of APM 2377...

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APM 2377, UNS S31803 - 4

electrodes or gas shielded arc welding. Welding should be undertaken within the heat input range 0.5-2.5 kJ/mm. Max. interpass temperature is 150°C (482°F). Preheating or post-weld heat treatment is normally not necessary. Matching filler metals are recommended in order to obtain a weld metal with optimum corrosion resistance and mechanical properties. For gas-shielded arc welding we recommend Sandvik 22.8.3.L or Sandvik 22.8.3.LSi, developed to give improved welding properties by gas metal arc welding (MIG/MAG). For manual metal-arc welding, the covered electrode Sandvik 22.9.3.LR is...

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