7 Conclusions. A new austenitic stainless steel grade, UNS S31035, has been developed intended for superheater and reheaters in advanced coal fired power boilers. Extrapolation from creep data with two methods gives a creep strength of (99 ± 3) MPa at 700°C for 100,000 h.
The solidification path and the σ-phase precipitation mechanism in the S31254 (UNS designation) steel are investigated thanks to Quenching during Directional Solidification (QDS) experiments accompanied by scanning electron microscopy observations and electron backscattered diffraction (EBSD) analysis. Considering …
Super-austenitic stainless steel S32654 containing 7 wt % Mo exhibits outstanding oxidation resistance at 900 °C within the initial 10 h, but catastrophic oxidation occurs at times longer than 10 h in air. (2) Super-austenitic stainless steel S32654 containing 7 wt % Mo suffers catastrophic oxidation at 1000 and 1200 °C in air. (3)
1. Introduction. Super austenitic stainless steels (SASSs) are used in a variety of applications that require a combination of good toughness and corrosion resistance [1, 2].The improvement of corrosion resistance is dependent on the high contents of alloying elements, and Mo plays an important role in improving the corrosion …
INCOLOY® alloy 25-6MO (UNS N08926/W. Nr. 1.4529, formerly UNS N08925) is a super-austenitic stainless steel containing 6% molybdenum and enhanced by an addition of nitrogen. The nickel and chromium contents of this alloy make it resistant to a wide range of corrosive environments. The alloy is especially resistant to non-oxidizing acids such ...
The newly developed LWSS alloys exhibit a balanced strength and ductility: Compared to commercial stainless steels and conventional austenitic lightweight steels, the LWSS alloys have both ultra ...
resistant than the 6%Mo super austenitic stainless steels. First and second-generation duplex stainless steels Duplex stainless steels have been available since the 1930s. Because of their relatively high chromium and molybdenum contents, the fi rst-generation duplex stainless steels, such as Type 329 (S32900) and Uranus 50 (S32404), have good
3.5wt% NaCi has shown that 6Mo has the highest pitting potentials, compared to the super duplex stainless steels S32750 as shown is Diagram 3. crevice corrosion 6Mo grade steels show higher pitting and crevice corrosion resistance compared to the traditional duplex and austenitic grades as shown in Diagram 4. Tests conducted
@article{osti_665232, title = {Phase identification in an isothermally aged austenitic 22Cr-21Ni-6Mo-N stainless steel}, author = {Lee, T H and Kim, S J}, abstractNote = {Since the austenitic stainless steels are frequently used as high temperature materials, thermal stability at elevated temperatures is one of the most …
The effect of Copper (Cu) on pitting resistance of modified 20Cr-18Ni-6Mo-0.2 N Super austenitic stainless steels was studied by chemical immersion, electrochemical impedance spectroscopy and X-ray photoelectron spectroscopy. It has been found that Cu affects on the average weight loss rate, the number of pitting pits, pitting …
SEATHER manufacture high quality stainless steel elbow, such as: Austenite steel 321, 316Ti, 316L, 304L, 304, 309S, 310S, 347, 317L, duplex and super duplex stainless …
The Nippon Steel group has commercialized 20Cr-18Ni-6Mo-0.2N super-austenitic stainless steel (trade name YUS 270) as a highly corrosion-resistant steel material in the form of a sheet, pipe, tube, bar, wire and so on1-3). The steel has been successfully applied to a wide variety of fields. Examples are: a desalination plant, a con-
The concept of super austenitic stainless steel comes with super ferritic stainless steel and super duplex stainless steel. A typical example is a super austenitic stainless steel containing 6% molybdenum and 7% molybdenum. These steel grades have been developed for industries with harsh conditions such as petrochemical, chemical, paper …
MATERIAL DESCRIPTION. All our 6Mo materials are produced by Norsok M-650 Ed.4 and/ or ISO 17782 qualified manufacturers. The 6Mo super austenitic steel combines …
Since the material offers a unique combination of high strength and superior corrosion resistance in comparison with austenitic and superaustenitic stainless steels, being …
6Mo / 1.4529 The austenitic stainless steel 6Mo was developed on basis of Alloy 904l / 1.4539. However, the molybdenum content at 6Mo was raised to 6.5%. 6Mo has excellent general corrosion resistance and improved resistance to pitting and crevice corrosion. The resistance to stress corrosion cracking is also increased.
Hot compression tests were carried out with specimens of 20Cr–24Ni–6Mo super-austenitic stainless steel at strain rate from 0.01 to 10 s−1 in the temperature range from 950 to 1150 °C, and ...
Isothermal aging treatments in the temperature range from 550 to 1150 °C for the aging time range from 2 to 2880 min were carried out on 20Cr-24Ni-6Mo super-austenitic stainless steel plates ...
AbstractApplication of UNS S31254 (6Mo super austenitic stainless steel, hereafter: 6Mo SS) has increased in oil and gas facilities to mitigate the corrosion associated with chlorides. In recent years, two cracking cases have occurred in hot-formed flanges and cold-formed fittings made of 6Mo SS, and it was considered that all the …
We're well-known as one of the leading 6mo super austenitic stainless steel elbow manufacturers and suppliers in China. If you're going to buy high quality 6mo super …
1. Introduction. The Nippon Steel group has commercialized 20Cr-18Ni-6Mo- 0.2N super-austenitic stainless steel (trade name YUS 270) as a highly corrosion-resistant steel …
The influence of B addition on dissolution behavior of (σ + γ) e eutectics of a 6Mo super austenitic stainless steel S31254 during the homogenization process was investigated by SEM-BSE observations combined with EDS. The results showed that the addition of 0.005 wt% B accelerated the dissolution of the σ phase controlled by Mo …
S. M. Bruemmer et al. [12] proposed that the susceptibility to IGC depends on the width and depth of the Cr-depleted zone at GB for 304 and 316 austenitic stainless steels. However, for super austenitic stainless steels such as 904 L and S31254, it is difficult to form Cr 23 C 6 during short-time aging due to its low C content (<0.02%) [13]. T.
The influence of B addition on dissolution behavior of (σ + γ) e eutectics of a 6Mo super austenitic stainless steel S31254 during the homogenization process was investigated by SEM-BSE observations combined with EDS. The results showed that the addition of 0.005 wt% B accelerated the dissolution of the σ phase controlled by Mo …
Abstract. Electralloy EC926 Mo is a solution strengthened, austenitic stainless steel alloy providing excellent resistance to aqueous corrosion, coupled with good strength and pitting resistance. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on …
6Mo Alloys Advantages of Alloy 6HN over Alloy 254 Introduction Named for their 6% molybdenum content, 6Mo super austenitic stainless steel alloys are highly resistant to pitting corrosion and chloride-induced stress corrosion cracking. Commonly used 6Mo alloys include UNS S31254 (alloy 254) and UNS N08367 (AL-6XN® and alloy 6HN). Swagelok …
Gas metal arc welding. Heino et al. [13] performed GMA welding on 12 mm thick super austenitic stainless steel of composition 0.02C–24Cr–7.3Mo–22Ni–3Mn–0.5Cu–0.5 N-Fe. During the microstructural evaluation, the authors detected two types of precipitates σ and R in the HAZ. It has been also reported …
Machining of INCOLOY alloy 25-6MO should be done at a slightly lower speed when compared stainless steel using rigid tooling and optimum lubrication and cooling. Welding. INCOLOY alloy 25-6MO can be welded by gas metal arc welding, gas tungsten arc welding, shielded arc welding, plasma arc welding and submerged metal arc welding.
The aging precipitation behavior of 20Cr-24Ni-6Mo super-austenitic stainless steel processed by conventional casting and twin-roll strip casting. 2019, Materials Characterization. Citation Excerpt : Typical second phases Sigma, chi (χ), Laves, Laves related phases-μ and C are frequently detected in SASSs [10–12]. In addition, …
The critical pitting potentials for the super aus- tenitic stainless steels (alloys 31 and 926) and type 316L stainless steel were determined from the anodic cyclic polarization curves, and they are shown in Fig. 1. The mean value of critical pitting potential for the type 316L stainless steel was + 240 inV.
We're well-known as one of the leading 6mo super austenitic stainless steel tube manufacturers and suppliers in China. If you're going to buy high quality 6mo super …
Outokumpu austenitic stainless steels include the workhorses grades Core 304/4301 EN 1.4301 (ASTM 304) and Core 304L/4307 EN 1.4307 (ASTM 304L) as well as enhanced grades for improved corrosion resistance. The latest addition to Outokumpu austenitic stainless steel grades is the Supra 316plus.
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