RA253 MA®是一种为满足工业中对耐高温不锈钢的需求而开发的热量抵抗不锈钢,它具有高强度和良好的抗氧化性。这种合金以其出色的蠕变强度和在极高温度下对氧化、硫化和侵蚀/磨损的高抗力而著称,且相比大多数耐热合金更具经济性。 尽管RA253 MA®的镍含量较低,但它提供了出色的蠕变强度和在极高温度下对氧化、...
RA 253 MA 高强度耐热不锈钢 RA253MA开发于30多年前，当时的工业要求耐热不锈钢具有高强度，同时保持良好的抗氧化性能。RA253MA中11%贫镍含量是实现经济高效、稳定的关键因素。RA253MA在温度高达2000°F(1093°C)时仍表现良好，与310不锈钢相似。性能简介 RA253MA是一种贫奥氏体耐热合金，强度高，抗氧化能力强。只含1...
RA 253 MA obtains its heat resistant properties by tight control of micro alloy additions. The use of cerium in combination with silicon results in superior oxidation resistance to 2000°F (1093°C). Nitrogen, carbon, and cerium combine to provide creep rupture strength that is double that of ...
The article presents information related to RA 253 MA, a microalloyed solution for high-temperature applications. It is noted that equal or superior oxidation resistance to many other alloys test is exhibited by the microalloyed solution. It is mentioned that in some mildly carburizing environments, ...
RA 253 MA ®是在 30 多年前开发的,当时该行业需要具有高强度、同时保持良好抗氧化性的耐热不锈钢。RA 253 MA 的 11% 贫镍含量是实现成本效益和稳定性的关键因素。添加稀土元素后,RA 253 MA 在高达 2000°F (1093°C) 的温度下仍然表现良好,与 310 不锈钢相似。
RA 253 MA 是一种奥氏体耐热合金,具有高强度和出色的抗氧化性。在仅含 11% 镍的合金中,它提供了蠕变强度与优异的抗氧化、硫化和高温侵蚀能力的完美结合。由于其化学性质贫乏,与大多数耐热合金相比,RA 253 MA 非常经济。 RA 253 MA 通过严格控制微合金添加量来获得其耐热性能。铈与硅的结合使用导致在 2000°...
RA 253 MA ® RA330 ® ASME Section VIII Div. 1 Maximum allowable design stresses, ksi 1100°F 1200°F 1350°F 1500°F 1650°F RA330 7.8 4.7 2.4 1.1 0.48 RA 253 MA 9.0 5.2 2.4 1.3 0.71 Maximum Suggested Temperature Limit in Air ...
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The β-strand of HAP has no equivalent in IL-17RA. However, it mimics the β-strand 0 of IL-17A. The amphi- pathic β-strand of HAP orients the hydrophilic side chains of His2 and Thr4 outwards, and the hydrophobic side chains of Ile1, Val3 and Ile5 inward (Fig....
Article Open access 27 November 2023 dCas9-VPR-mediated transcriptional activation of functionally equivalent genes for gene therapy Article 07 February 2022 Background Interest in the identification of small promoters for recapitulating unique gene expression patterns is longstanding, as such promoters...