1.4876 / 1.4958: Corrosion-resistant and heat-resistant
The material 1.4876 / 1.4958 or X10NiCrAlTi32-20 / X10NiCrAlTi31-20 is a rustproof, heat-resistant nickel-iron-chromium alloy. The name Alloy 800H is also common. Depending on the manufacturer and version, 1.4876 / 1.4958 has a chemical composition of 0.05 - 0.10% carbon, 19.0 - 23.0% chromium, 0.5 - 1.0% manganese, max. 0.015% phosphorus, max. 0.01% sulfur, 0.2 to 0.6% silicon, 30.0 - 35.0% nickel, 39.5 to 50.0% iron, max. 0.5% copper, 0.15 - 0.6% aluminum, 0.15-0.6% titanium as well as aluminum and titanium combined 0.3 - 1.2%. By limiting the sum of aluminum and titanium to max. The drop in toughness between 500 and 750 กใ C can be reduced by 0.7%. For workpieces that are often exposed to temperatures from 500 to 700 กใ C, Alloy 800H is more suitable than its Alloy 800HT variant. Another variant is Alloy 800HP / Alloy 800HT or 1.4959 with a different directional analysis. The corrosion resistance and heat resistance are granted at 1.4876 / 1.4958. At high temperatures, the austenitic stainless steel maintains its metallurgical stability over longer periods. In certain temperature ranges 1.4876 / 1.4958 is well resistant in sulfur-containing oxidizing, nitrogenous and reducing media. In particular, 1.4876 / 1.4958 has good resistance to carburizing up to approx. 1000 กใ C, provided that a protective, thin oxide layer was formed by pre-oxidation. The creep rupture strength at high temperatures above 600 กใ C is improved by solution annealing. In the solution annealed condition 1.4876 / 1.4958 has a tensile strength of 450 MPa at room temperature, a yield strength of min. 170 MPa and an elongation of 30% across and 35% lengthways.
The scope of delivery of Georg Grimm Edelstahlgroßhandlung GmbH with the quality 1.4876 / 1.4958 or Alloy 800H includes steel bars, bright steel, wire, sheet metal, semi-finished products and forgings. Round steel, flat steel, hexagonal steel, square steel and angles are available for grade 1.4959 depending on the volume.
1.4876 / 1.4958: Good processability through solution annealing
The hot forming of 1.4876 / 1.4958 has to be carried out at temperatures of 1200 - 900 กใ C with subsequent quenching in water or in the air. A temperature range of 1150 to 1000 กใ C should be selected for hot bending. A stay at temperatures of 760 to 540 กใ C should be avoided if possible. 1.4876 / 1.4958 should be heated to a maximum working temperature of 1200 กใ C in the oven. A holding time of approx. 60 minutes occurs per 100 mm thickness. Alloy 800H has good ductility and is good cold and hot formable. Compared to other austenitic stainless steels, Alloy 800H has a high tendency to work hardening. Annealed workpieces are suitable for cold forming. Stronger cold working may require additional intermediate annealing. An annealing should be carried out urgently for deformations above 10%. In the course of the heat treatment, the solution annealing must be carried out at 1150 - 1200 กใ C with rapid cooling under water. With strengths of max. 1.5 mm quick air cooling is also possible. In the solution-annealed state, a maximum Brinell hardness of 192 HB can be achieved. The operating temperature is 600 - 950 กใ C. Basically all common welding processes can be used for 1.4876 / 1.4958, e.g. B. TIG welding, TIG hot wire welding, MIG / MAG welding, plasma welding, MMA welding, submerged arc welding or manual arc welding. With Alloy 800H, preheating or subsequent heat treatment is usually not necessary. When processing, make sure that the workpiece is solution annealed, bare metal and completely free of tension and dirt (especially grease, markings or scale). Due to the high work hardening, a low cutting speed and a sufficient depth of cut must be set when machining 1.4876 / 1.4958. Adequate heat dissipation must also be ensured with the help of water-containing cooling lubricants. When all welding work has been carried out, a stable anneal is carried out for safety, since the heat affected zones of the welds are particularly susceptible to cracking. The pickling should be done in nitric hydrofluoric acid and the pickling baths should be carefully monitored for concentration and temperature. Machining should preferably be carried out at low cutting speeds in the solution annealed condition.
1.4876 / 1.4958: Heat-resistant stainless steel for furnace construction and the chemical industry
1.4876 - The material data sheet at Georg Grimm Edelstahlgroßhandlung GmbH Wuppertal
The heat-resistant stainless steel 1.4876 / 1.4958 has a wide range of applications thanks to its good workability. Above all, Alloy 800H proves to be a reliable partner for use at high temperatures. 1.4876 / 1.4958 is therefore preferably used in furnace construction, e.g. B. in the form of muffle. Alloy 800H is also used for burner components and components for heat treatment systems such as B. heat exchanger tubes, brackets, baskets and other containers in the high temperature range. In addition, it is used for parts exposed to hydrogen sulfide in petrochemicals and for parts for use in hydrogen production. Grade 1.4876 / 1.4958 is also widespread in the chemical industry. The austenitic stainless steel is used in petrochemicals and the like. a. for parts exposed to hydrogen sulfide. In addition, refineries use Alloy 800H, for example for flares. Due to its excellent resistance to hydrogen embrittlement, carburization and nitrification, the austenitic stainless steel 1.4876 / 1.4958 is suitable for use in contact with hydrogen as well as for steam / hydrocarbon reformers, ethylene pyrolysis and systems in the production of ketone and acetic acid hydride. Alloy 800H is also used to manufacture components for the high-temperature range in power plant construction. Other areas of application of 1.4876 / 1.4958 include the automotive industry, environmental protection systems, laboratory technology and quench systems.
Inconel 625 / N06625 / 2.4856 Inconel 601 / N06601 / 2.4851 Inconel 718 / N07718 / 2.4668 Inconel 690 / N06690 / 2.4642
Inconel 617 / N06617 / 2.4663 Inconel X-750 / N07750 / 2.4669 Inconel 600 / N06600 / 2.4816 1.4876 / 1.4958:
Incoloy 800HT / N08811 / 1.4959 Incoloy 825 / N08825 / 2.4858 Incoloy 800H / N08810 / 1.4958 Incoloy 20 / N08020 / 2.4660
Incoloy 925 / UNS N09925 Hastelloy B-2 / N10665 / 2.4617 Hastelloy C-276 / N10276 / 2.4819 Hastelloy C-22 / N06022 / 2.4602
Hastelloy B-3 / UNS 10675 / 2.4600 Hastelloy C-4 / N06455 / 2.4610 Hastelloy X / N06002 / 2.4665 Monel 400 / UNS N04400 / 2.4360
Monel K-500 / N05500 / 2.4375 Monel R-405 / N04405