3a21铝合金等于什么型号

1. 铝板LF21-M与LF21的区别

“LF21”是铝合金的一种老牌号，新的牌号为“3A21” 是铝合金的材质,“M”是此合金的一种状态，为退火状态，也是以前的状态代号，现在为“O态”，也就是软态！

"LF21-M"对应现在的牌号为“3A21-O"，为铝锰合金3A21 O态！是应用最广的一种防锈铝，在

退火状态有很高的塑性，耐腐蚀好，焊接性良好。用途主要用于要求高的可塑性和良好的焊接性，在液体或气体介质中工作的低载荷零件，如油箱，汽油或润滑油导管，如厨具、食物和化工产品处理与贮存装置，运输液体产品的槽、罐，以薄板加工的各种压力容器与管道一般器物、散热片、化妆板、影印机滚筒、船舶用材。

希望能对你的疑问有帮助！

2. GB/T 3190-2008标准中的3A21铝合金对应的国际牌号是

Vehicle Performance test system configuration and the diversity of the normative

Distributed networked control system. 3.3 System Performance System Performance Automotive comprehensive performance test that reflects the effect of output indicators, including the proction of quantitative indicators - detection efficiency and quality indicators - both the content level of service. 3-3.1 detection efficiency. Detection system detection efficiency is reflected in the number of vehicles detected per unit time index, available on the number of vehicles seized, the number of annual inspection of vehicles, the effective annual number of vehicles and other indicators to represent. 3.3.2 services. Inspection station's output is essentially a service level of service reflects the detection system to detect the depth and breadth of the vehicle, the test results with the real situation close to the level of the index. 4 Conclusion According to incomplete statistics,mbt footwear, as of the late 90s, has been built around the country comprehensive performance vehicle inspection station 1500 (of which A-Station 338, B-class station 827, C-class station 335), a rational capacity \Communications Standardization \approach, in order to achieve the real effect of external relations. Key words: concrete; appearance quality; common problem; control CLC: U443.17 Document code: B Article ID :1002-4786 (2004) 08-0036- - yunHenanRoad-, Shangqiu476000, China) Abstract: emea. suresofpreventionandcure. Keywords: concrete; exteriorquality; generaldisease; preventionandcure quality of concrete structures, including internal quality and appearance quality. Modern construction technology and management structure for the intrinsic quality of easy assurance, but the quality of the appearance of structures there is always this or that defect, the light can not be rated as excellent works, causing heavy scrap, in the economic, credit, causing significant losses. Therefore,tory burch shoes, the structure must attach great importance to visual quality, especially for large-scale bridges and overpasses and other cities, the appearance size and quality of utmost importance. ,> 7,> 7,> 7,> 7,> 7,> 70: ->, 0 :->,ralph lauren uk,,> 7 a,http://www.wholesale-maccosmetics.org, the appearance of quality defects of concrete quality problems, including the appearance of concrete cellular, Ma surface, fracture, color, smoothness bad, cold joint aspects. (A) of the cellular concrete structures there, Pock 1. Causes ① concrete segregation. ② stone size larger. ⑧ vibration e to vibration or leakage. ④ poured concrete layer thickness does not meet the requirements. Support, management and orderly,mbt shoes discount, convenient and comprehensive performance testing of automotive network has been formed, the state of technology for the protection of the vehicle completely, the quality supervision and inspection of vehicle maintenance, improve road transport capacity to provide strong technical support and protection. Comprehensive performance test in China's automobile instry development, the test standards and regulations have been established and improved, standardized testing system from the general trend is increasing, but on the other hand, Vehicle Performance Test System Configuration 2. ① Select level solution with the thickness of cell aggregate, maximum aggregate size must meet the minimum bar spacing requirements. ② rate adjustment sand and concrete slump, meet workability requirements. ⑧ concrete vibrator vibration can not leak e to vibration, can not be too vibration. Tap the eligibility criteria for the concrete is no longer sinking, no bubbles can be. ④ concrete to meet the requirements of the mixing time and casting methods, when the infusion there was a high degree of convergence of ≥ 2m, the problem of inadequate personality, test system configuration from the testing requirements is more serious. Solution to this problem is, we must first full analysis of test demand, to meet the testing standards and testing requirements based on the purpose of testing the system structure and configuration to achieve the normative and unity in diversity, which is the rational allocation of inspection resources and improve the effectiveness of detection systems and means of the inevitable requirement. Received date :2004-04-12j \ More articles related to topics：

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3. 3A21铝合金跟LF21有什么区别

没有区别，3A21是新牌号，LF21是老牌号，是同一种材质。
LF21铝合金(新牌号3A21)为AL-Mn系合金，是应用最广的一种防锈铝，这种合金的强度不高（稍高于工业纯铝），不能热处理强化，故采用冷加工方法来提高它的力学性能：在退火状态有很高的塑性，在半冷作硬化时塑性尚好，冷作硬化时塑性低，耐腐蚀好，焊接性良好，可切削性能不良。用途主要用于要求高的可塑性和良好的焊接性，在液体或气体介质中工作的低载荷零件，如邮箱，汽油或润滑油导管，各种液体容器和其他用深拉制作的小负荷零件：线材用来做铆钉,广泛用于厨具、食物及化工产品处理与贮存装置、运输液体产品的槽、罐、以薄板加工的各种压力容器与管道、热交换器、铆钉、焊丝、洗衣机缸体等。

4. LF21是什么铝合金

L是铝的拼音字母第一个
F是防锈的拼音字母第一个
21代表21号防锈铝
LF21国内新牌号是3A21，对应美国牌号3003
LF21是一种铝合金，LF21铝合金为AL-Mn系合金，是应用最广的一种防锈铝。
标准：GB/T3190
化学成分：
硅Si：0.60
铁Fe: 0.70
铜Cu：0.20
锰Mn：1.0-1.6
镁Mg：0.05
锌Zn：0.15
钛Ti：0.10-0.20
铝Al：余量
力学性能：
抗拉强度 σb (MPa) ) 120-160
条件屈服强度 σ0.2 (MPa) )≥85