904l steel hardness. Both earn lower Rockwell hardness scores than other alloys like tool steels or cobalt chromium. Dec 29, 2020 · On the Vickers scale, the normal 316L and 904L steel has a surface strength of between 150-190, whereas the steel in the U50 has twice that, around 350. p. Sep 14, 2024 · The hardness of the Rolex 904L is ~490HV(Vickers) and the "common" watch steel 316L is ~400HV. Cited properties are appropriate for the annealed condition. The recrystallization process and grain growth phenomena play key roles in achieving high levels of material quality, as often requested by customers for specific applications. Hardness ( in 50% ), Min Reduction Area, Min Elongation at Yield ( BHN ), Min AISI 904L Stainless Steel, AISI 904L, 904L Stainless Steel, Alloy 904L, UNS N08904 Non-magnetic in nature. 5% molybdenum, 904L provides The SS 904l stainless steel plate is a non-stabilized austenitic stainless steel grade. It is a non-standard grade that was developed in the 1960s to offer superior resistance to corrosion, particularly in There is no difference between 316L and 904L steel in strength and hardness. 904L is an austenitic stainless steel offering moderate to high corrosion resistance available in bar and plate with delivery to the whole of the UK. John Hone Cold rolled 904L Steel Plate 0. Jul 11, 2010 · The 316L Stainless steel is far less scratch resistant than the 904L because it has a much higher Rockwell hardness. The formation of aluminide phases provided higher hardness on the surface of 904L stainless steel compared to untreated 904L. A 904l Stainless Steel Sheet is designed with a superior chemical composition of chromium, nickel, molybdenum, and other alloys. As we said, it has better resistance to corrosion and acids because it is made of same elements as grade 304, with addition of molybdenum. Due to its extra amounts of chromium, molybdenum, nickel and copper, 904L steel features superior resistance to corrosion, rust and acids. Alloy 904L Coils temperatures up to 95°F and Stainless Steel 904L Plate provides Aug 15, 2018 · Rolex 904L is around 85-90 HRB on the Hardness Rockwell B scale, the equivalent Vickers Hardness Value (Hv) would be around 200 - 250. com. Oct 7, 2019 · 904L is a kind of super austenitic stainless steel, which has high strength, high hardness, good impact toughness and welding performance with low carbon, high nickel, chromium, and a small amount of Nov 15, 2023 · Like 316L stainless steel, 904L stainless steel is a low-carbon super austenitic stainless steel. Additionally, the British Standard (BS) designation is 904S13. 316L is highly recommended for corrosion-resistant applications, but only for general use. Grade 904L stainless steel is the super austenitic stainless steel with low carbon chemical components. ASTM A312 TP 904L High Corrosion Resistance ASTM A312 904L Stainless Steel Seamless Pipe is a super austenitic stainless steel with high levels of chromium, nickel, and molybdenum. High resistance to localized corrosion such as pitting and crevice corrosion, as well as to stress-corrosion. 3%), copper (1. Grade 904L Steel Plates, SS 904l Cold Rolled Plate thicknesses from 3/16 through 2. The combination of high chromium and nickel content, coupled with additions of molybdenum and copper, assure good to excellent corrosion resistance With its highly alloyed chemistry — 25% nickel and 4. 004 in) Width: Up to 500 mm (19. DIN EN 1. • SS 904L has low carbon content and copper has been added to it, to increase its resistance against strong reducing acids, like sulphuric acid. com Heat to 1090-1175°C and cool rapidly. [16] They Apr 30, 2021 · NiTi wire coating was preplaced on super austenitic stainless steel (904L) for enhancing the surface mechanical property. 904L exhibits higher nickel (Ni), chromium (Cr), and molybdenum (Mo) content compared to 316L. 4539 Plate: Cold rolled, bright annealed: UNS N08904 Plates 2B Finish The Aluminide layer is composed of FeAl2, Fe2Al5, FeAl and Al5FeNi phases in both aluminized samples. The 316L has less nickel in it and is far brighter in appearance and tends to stay that way. 904l Steel Corrosion resistance. However, both 904L and 316L deliver substantial ruggedness for watchmaking needs even if maximum scratch resistance isn’t the top priority. But did you know some manufacturers use steel with >700HV, even 1200HV and 1500HV!!!! The 1500HV steel beats the 904L on the DS SD easily since a 1500HV steel case without the "Rolex SD gas esc. 0%; Si 0. Its high alloying content also gives it greater resistance to chloride stress corrosion cracking, but it is still susceptible. 904L steel is added with copper to improve its resistance to strong reducing acids, such as sulphuric acid. The grown boride layers were evaluated The effects of input variables on the weld geometry, microstructure, and hardness had been analyzed during GMAW of AISI 904L super austenitic stainless steel sheets by Sathiya et al. 2% Yield 32 ksi (min) R. 5%) combined with its high nickel Jun 11, 2024 · Mechanical properties of stainless-steel grade decide their application suitability under specific conditions. The alloy is also resistant to stress corrosion cracking and crevice corrosion. Annealing: The recommended annealing temperatures for 904L wrought steel is 1095 °C (2000 °F). In comparison to 316L, 904L has higher levels of chromium, nickel, and molybdenum, which gives it superior corrosion resistance. Main characteristics of Osprey ® 904L Alloy 904L (UNS N08904) is a superaustenitic stainless steel that is designed for moderate to high corrosion resistance in a wide range of process environments. The corrosion resistance of 904L is better than that of conventional stainless steel. It is softer than 316L, [1] [2] and its molybdenum addition gives it superior resistance to localized attack (pitting and crevice corrosion) by chlorides and greater resistance reducing acids; in particular, its copper addition gives it useful corrosion resistance to all concentrations of sulfuric acid. UR™ 904L UR™ 904L: A multipurpose austenitic stainless steel with PREN ≥ 34 UR™ 904L is a multipurpose 20 Cr - 4. Heat Treatment. Keywords: Intermetallic, Aluminizing, 904L stainless steel, Aluminide phase, Pack cementation. Jan 20, 2022 · The P Number for 904L is P 45. 904L Stainless Steel is a high moly austenitic grade alloy available in form of Pipe, Tubing, Pipe Fittings, Flanges, Valves, Fasteners, Round Bar & Plates. Stainless steel grades ISO 316L and ISO 904L mechanical properties are discussed below: Hardness . Stainless Steel Grade 316L. 904L is a high-alloy stainless steel with high chromium, nickel, and molybdenum levels. 904L alloy is a low carbon non-stabilized austenitic steel. Produced to low carbon levels for use in the welded condition. 904L grade stainless steel is unlike any other steel. In hydrochloric acid, 904L is limited to a lower concentration of 1-2%. West Yorkshire Steel are suppliers and stockholders of 904L stainless steel bar and plate. Good forming and welding properties. 904L stainless steel stockholders and suppliers, delivering to the whole of the UK. The stainless-steel varieties 316L and Stainless Steel 904L Pipes are the most common in watchmaking and thus the most relevant to our study. Additionally, 904L is also resistant to stress-corrosion cracking and pitting. This table shows approximate hardness of steel using Brinell, Rockwell B and C and Vickers scales. The 904L is often used for body jewelry or piercings and it is not particularly expensive. Feb 2, 2021 · Adding copper to the 904L stainless steel further increases its corrosion resistance but at the expense of the alloy’s final hardness. Sep 8, 2023 · Osprey ® 904L is a high-alloy austenitic stainless steel characterized by very good resistance to general corrosion in sulphuric, phosphoric and acetic acid as well as very good resistance to pitting corrosion and stress corrosion cracking (SCC). But we can consider SS904L as super austenitic stainless steel due to its higher alloying chemistry such as high nickel, chromium, molybdenum, and the addition of copper for various corrosion resistance purposes. When it comes to hardness, 316L and 904L offer similar performance. ATI 904L™ ATI 904L™ Stainless Steel: Superaustenitic (UNS N08904) INTRODUCTION . 904L has a higher amount of chromium, nickel, and molybdenum than duplex stainless steel does. Nickel can be an irritant to some. au Grade 904L is a non-stabilised low carbon high alloy austenitic stainless steel. Corrosion. Feb 8, 2023 · This type of stainless steel is often used in applications with exposure to highly corrosive environments, as it offers superior corrosion resistance compared to other alloys. The alloy also offers excellent formability, weldability, and toughness. During cold rolling, the austenite phase showed high mechanical stability against the deformation-induced martensitic transformation. The alloy contains high levels of chromium and nickel with additions of molybdenum and copper to provide added corrosion resistance Oct 16, 2023 · The effects of cold rolling, subsequent continuous heating, and aging on the microstructure and tensile properties of AISI 904L superaustenitic stainless steel were investigated. These conversion charts are provided for guidance only as each scales uses different methods of measuring hardness. 5% molybdenum — 904L provides good chloride stress corrosion cracking resistance, pitting resistance, and general corrosion resistance superior to 316L and 317L molybdenum enhanced stainless steels. Outstanding hardness even lower than cryogenic limits. Both of them have similar Rockwell hardness (HRB) which is less than 95 and their tensile strength are both about 490MPa. 904L steel has high resistance to spot corrosion. Today, most of the applications that employ grade 904L are replaced by low-cost duplex stainless steel 2205. 904L Stainless Steel Composition May 30, 2020 · N08904 stainless steel is a superaustenitic (highly alloyed) stainless steel formulated for primary forming into wrought products. 7%; S 0. 1%; P 0. They are both austenitic stainless steel because they have a similar crystalline structure. Quite a few companies produce harder steel for their watches: Sinn Tegimented Steel - 1200 Hv Alloy 904L (UNS N08904) ALLOY 904L STAINLESS STEEL AVAILABLE TUBE PRODUCT FORMS STRAIGHT COILED SEAMLESS MECHANICAL PROPERTIES Temper Annealed Tensile Rm 71 ksi (min) Tensile Rm 490 MPa (min) R. Type 316 stainless steel is the second common grade of steel. 4 mm; Hot rolled 904L Steel Plate 3. 440 steel, especially 440C, is difficult to process due to its high annealing hardness and abrasive Sep 19, 2022 · Chemical composition of stainless steel 304, 316L & 904L commonly found in watches and watch bands. 904L Stainless Steel. However, work-hardening during cold deformation manifested itself into high Jun 23, 2024 · Who Uses 904L vs 316L Stainless Steel? Rolex wasn’t the first to use 904L steel, nor the first to give it a cute name: Some Omega Ploprof models from the early 1970’s were made from 904L steel, which Omega called “Uranus Steel. 904L is an austenitic stainless steel. This means that they will be able to withstand most forces, which is important for BWMS. 4539, UNS N08904, Uranus B6 and SS2562 grade material are equivalent to AISI 904L May 5, 2024 · This metal is highly resistant to pitting and crevice corrosion, making it ideal for use in harsh environments. It is widely used in applications where the corrosion properties of TP316/L and TP317/L are not adequate. 4539 / AISI 904L is a high-alloy austenitic stainless steel with a high molybdenum content, additional copper content and very low carbon content. 5-6. In this study, AISI 904L steel was pack boronized in a solid medium at temperatures of 900, 1000 and 1100 C for 2, 4 and 6 h with nano-sized boronizing powders. Feb 25, 2024 · Hardness. The Stainless-steel grades ISO 316L and ISO 904L Brinell hardness, Vickers hardness, and Rockwell hardness are given below in table. 904L Revised May 2008 Page 1 of 2 www. As such, this gives smaller brands access to the metal for their watches. atlassteels. • 904L is an austenitic grade stainless steel with low carbon and higher resistance to stress and crevice corrosion cracking as compared to AISI 316 & AISI 317 stainless steel grades. Nov 24, 2023 · The distinction between 904L and 316L stainless steel bar properties lies primarily in their composition and resulting characteristics. The following table lists Rolex 904L stainless steel (SS904L) mechanical properties such as yield strength, tensile strength, elongation and hardness. 0–10. 440 stainless steel can be hardened and tempered in the same manner as alloy steel. This gives it superior corrosion resistance and makes it ideal for applications where corrosion resistance is a priority. 5 in) Dec 11, 2022 · The first major difference between 904L and duplex stainless steel is their composition. AISI 904L Sheet 2D Finish: Cold rolled, heat treated, pickled: 2R Finish DIN 1. On the U50 it was silky smooth bead-blasted, which made its intrinsic tank-like properties feel even more counterintuitive. The solution processing like heating up to 1090oC to 1175oC and quick quenching is done. Care needs to be taken as this grade solidifies fully austenitic, so is susceptible to hot cracking, particularly in constrained weldments. Alloy 904L is a non-stabilized, high alloy austenitic stainless steel with low carbon content. Machinability. It is impossible to work harden type steel 904L through heat processing. SS 904l prevents stress corrosion cracking and gives extensive To be considered Type 904L, a stainless steel must have a unique chemical composition that includes the following: Fe balance; Ni 23-28%; Cr 19-23%; Mo 4-5%; Mn 2%; Cu S 1-2. This property is advantageous in applications like mining equipment, where the pipe may come into contact with abrasive materials. Forging Austenitic stainless steel 904L is a highly pure grade containing low content of sulfur. en 1. The influence of TIG current on microstructure, phase formation, micro-hardness and abrasive wear resistance characteristics of the clad surface 904L vs 316L Stainless Steel – What’s the Difference? 904L vs 316L Stainless Steel – 1. While its unique hardness allows it to withstand extreme conditions, it also requires special machinery and production processes in order to be shaped. The steel should not be utilized over 400oC. In this Jan 20, 2023 · 904L is a high-alloy austenitic stainless steel that is known for its excellent resistance to corrosion. Let’s take a look at the composition, mechanical properties, physical properties, and uses of 904L stainless steel. In chloride solution, it has good resistance to crevice corrosion. This grade cannot be hardened by thermal treatment. Melting of NiTi wire of 1 mm diameter formed a clad track on the 904L stainless steel substrate using the TIG cladding process. 904L is more expensive than other types of stainless steel, but it is worth the extra cost for its superior corrosion resistance. As a result, this grade is highly resistant to corrosive and oxidation environments. system" can dive to 2000m without any problems! Wear Resistance: The hardness of Seamless 904L Stainless Steel Pipe enhances its wear resistance, reducing the risk of surface damage or erosion in abrasive environments. See full list on azom. May 27, 2021 · Both 904L and 316L stainless steel have a Rockwell hardness value below 95, which is typical for most stainless steel. 904L is more susceptible to stress Jul 29, 2022 · The fact that stainless steel does not oxidize distinguishes it from conventional steel, hence the term stainless. 904L stainless steel, also known as UNS N08904, is a super austenitic stainless steel grade. ” Ball released the Railmaster Icebreaker in 2019, which was their first foray into 904L steel watches. The addition of copper to this grade gives it greatly improved resistance to strong reducing acids, particularly sulphuric acid. I speculate that the increase in the nitrogen content boosts the hardness of 904L stainless steel to mitigate the addition of copper and the reduction of carbon. 904L stainless steel is non-magnetic and offers excellent formability, toughness, and weldability. 3%; N 0. The versatile 904l Sheet is a thin metal grade designed with superior resistance to corrosive and oxidative media. Many larger manufacturing partners are investing in the necessary equipment to process the 904L steel. It is also highly resistant to chloride attack - both pitting / The material requires specialized machinery and advanced techniques to properly machine and polish, which can increase production costs. 4539 / uns n08904 / 904l AISI 904L is a high nickel – molybdenum austenitic stainless steel with a very high corrosion resistance specifically for handling medium concentrated sulfuric acid solutions. Excellent resistance to hot seawater and chloride based corrosion. This composition imparts exceptional corrosion resistance, especially in harsh environments containing acids such as sulfuric acid, acetic acid, and phosphoric acid. With watch brands like Ball starting to use 904L stainless steel, taking the bragging rights away from Rolex, we thought now is the perfect time to explore the differences between 316L and 904L - at least when it comes to watches. N08904 is the UNS number for this material. Definition . 2% Yield 220 MPa (min) Elongation (2” or 4D gl) 35 % (min) INDUSTRIES PREDOMINANTLY USING THIS GRADE CHEMICAL . 1. The right hand column show an approximate equivalent tensile strength. However, this hardness also means that 904L steel is more resistant to scratches and surface damage, enhancing the long-term appearance and value of the watch. SS904L vs SS 316. Due to addition of Copper, it has increased resistance to phosphoric, sulphuric and hydrochloric acid concentration. The 904L Stainless Steel has high concentrations of nickel, chromium, and molybdenum in its chemical composition. Jan 28, 2023 · What is 904L Stainless Steel? 904L stainless steel is a non-stabilized austenitic stainless steel with low carbon content. 904L is used in specific severe conditions such as heat exchangers. 00031-0. However, its chemical composition includes greater numbers of chromium (19-23%) and nickel (23-28%), which gives the alloy greater corrosion resistance than 316L. With its highly alloyed chemistry — 25% nickel and 4. UNS NO8904, commonly known as 904L, is a low carbon high alloy austenitic stainless steel which is widely used in applications where the corrosion properties of AISI 316L and AISI 317L are not adequate. Jan 21, 2022 · AISI 904L is a super-austenitic stainless steel that is remarkable for its mechanical properties and high corrosion resistance, which strictly depend on its chemical composition and microstructural features. Oct 25, 2021 · Well, the Longines watch uses 316L steel for the case and bracelet. 904L is an austenitic grade stainless steel with low carbon and higher resistance to stress and crevice corrosion cracking as compared to AISI 316 & AISI 317 stainless steel grades. 3 Mo high corrosion resistance austenitic stainless steel developed 40 years ago by Industeel. 316L is more weldable than 904L Jun 26, 2024 · Corrosion Resistance of Stainless Steel 316L and 904L. Grade 904L contains high amounts of expensive ingredients, such as molybdenum and nickel. And the common industry name is Alloy 904L. Welding. Yes, some microbrands are starting to use 904L steel. Its Typical forging temperature range for 440A, 440B and 440C stainless steel. This type of steel offers excellent formability, weldability, and toughness in comparison to other steels on the market. 440A: 925-1200 ℃ 440B: 925-1175 ℃ 440C: 925-1150 ℃ Hardening. In this concentration range. | Excellent corrosion resistance to sulfuric and phosphoric conditions. 904l steel has maximum application temperature up to 450oC. 03%; All of the Type 904L stainless steel that Continental Steel supplies; meets typical manufacturing specification including ASTM, EN Steel Hardness Conversion Table. 0 mm; SS 904L Plate Hardness: Soft, Hard, Half Hard, Quarter Hard, Spring Hard Stainless Steel 904L Sheet suppliers: Availability of Stainless Steel 904L Foil sizes: Thickness : 8-100 microns (0. 0. ATI 904L™ alloy is an austenitic stainless steel designed for a middle to high level of corrosion resistance. Due to combined additions of chromium (20%), molybdenum (4. Mechanical Properties. 904L can be successfully welded by all standard methods. Both SS 904L and SS 316L are austenitic stainless steel materials. ATI 904L™ alloy (UNS N08904) is an austenitic stainless steel designed for a middle to high level of corrosion resistance. This article is about 316L and 904L steel. While both ISO 316L and ISO 904L perform well in corrosive environments, 904L is highly resistant to corrosion in high chloride environments. bfohu bbl rjygq pakt job vjdwnb nkbxj vemnda xjbyojcd vktll