SAE number

In decreasing order of exactness, methods of defining viscosity include absolute (poise) viscosity kinematic viscosity in centistokes relative viscosity in Saybolt universal seconds (SUS) and SAE numbers. 

SAE numbers have been established by the Society of Automotive Engineers to specify ranges of SUS viscosities of oils at SAE test temperatures. Winter numbers (5W, low, 20W) are determined by tests at 0°F. Summer numbers (20W, SOW, etc.) designate the SUS range at 210°F. Table 40.1 is a chart of the temperature ranges. 

Figure 52.7 The SAE numbering systems for engine oils and gear oils are not related and must not be confused. This figure illustrates the differences...

SAE Numbers—A classification of motor, transmission, and differential lubricants to indicate- viscosities, standaidized by the Society of Automotive Engineers. They do not connote quality of the lubricant. 

The viscosity of a fluid varies very rapidly with the temperature, as indicated in Fig. 5.3. This figure shows absolute viscosity /i (to be distinguished from previously discussed kinematic viscosity, /p= v) vs temperature for several motor oils. Society of Automotive Engineers (SAE) numbers are used to classify the viscosity of motor oils in the USA. 

The viscosity of automotive motor oil is designated by its SAE number, such as 40 W. When compared in a ball viscometer (Fig. 12-15), the ball drops much faster through 10 W oil than through 40 W oil. Which of these two oils provides better winter service in the Arctic region of Canada Which is best suited for summer use in the American Southwest Which oil has the stronger intermolecular forces of attraction ... 

Glavincevski, B., O.L. Gulder and L. Gardner (1984), Cetane number estimation of diesel fuels from carbon type structural composition . SAE paper No. S4- 34, International fuels and lubricants meeting, Baltimore, MD. 

UNS is the United Numberiug System. The XX after the grade designation foUows the AISI/SAE system and hence iadicates carbon content the Z is either an arbitrary number or 0. Eor a hiUer description and tabulations of this new numbering system, see reference 49. 

Enified Numbering System for Metals and Alloys, SAE HE 1086 or ASTM DS-56A, 5th ed., 1989 Also available in electronic form on floppy disk. 

Unified Numbering System for Metals andMlloys, SAE HS 1086a or ASTM DS-56a, 2nd ed., 1977. 

UNS was established in 1974 by ASTM and SAE to reduce the conFusion involved in the labeling of commercial alloys. Metals have been placed into 15 groups, each of which is given a code letter. The specific alloy is identified by a five-digit number following this code letter. 

Proprietary alloys are assigned numbers by the AA, AISI, CDA, ASTM, and SAE, which maintains master listings at their headquarters. Handbooks describing the system are available. (Cf. ASTM publication DS-56AC.)... 

This classification was devised by the Society of Automotive Engineers (SAE) in America by dividing the viscosity span into four and giving each of the divisions a number - SAE 20, 30, 40 and 50. The thinnest (SAE 20), for example, covered the range 5.7-9.6cSt specified at 210°F, which was considered to be a temperature typical of a hot engine. (The SAE originally specified temperatures in °F, because they were the convention. Today, temperatures are quoted in °C.)... 

Determine the value of the Reynolds number for SAE 10 lube oil at 100°F flowing at a rate of 2000 gpm through a 10 in. Schedule 40 pipe. The oil SG is 0.92, and its viscosity can be found in Appendix A. If the pipe is made of commercial steel (e = 0.0018 in.), use the Moody diagram (see Fig. 6-4) to determine the friction factor / for this system. Estimate the precision of your answer, based upon the information and procedure you used to determine it (i.e., tell what the reasonable upper and lower bounds, or the corresponding percentage variation, should be for the value of / based on the information you used). 

Are there clear instructions for reporting of adverse events and serious adverse events (SAEs) There should be full instructions for the reporting of SAEs (including addresses and fax numbers), with time limits. It should be clear that these rules also apply to SAEs that occur in subjects who have finished the study. All SAEs that come to the knowledge of the trialist should be reported unless the protocol provides guidance or time limit when the authors can justify that the occurrence of the SAE could not be related to the treatment received in the clinical trial. In a blinded study, there should be clear instructions on when and by whom the code for a particular study subject should be unblinded in an emergency. 

A four- or five-digit numbering system has been established to classify and identify different types of steel. Originally developed by the Society of Automotive Engineers (SAE) this system is now used by the American Iron and Steel Institute (AISI) to classify steel. 

Metals and Alloys in the Unified Numbering System, 6th ed., SAE/ASTM, Warrendale, Pa., 1993. 

Hunwartzen, L, Modification of CFR Test Engine Unit to Determine Octane Numbers of Pure Alcohols and Gasoline-Alcohol Blends, SAE Paper No. 820002, Society of Automotive Engineers, Warrendale, Pa., 1982. 

To examine the physical and surface active properties of SAE, three secondary alcohol samples each having three successive carbon numbers, as mentioned earier, were prepared. For practical reasons, blends of alcohols are chosen instead of alcohols having individual carbon numbers. The alcohol samples were ethoxylated to various degrees of polymerization for testing. Two previous papers by other workers are recommended with reference to this subject. One by MacFarland(5) of Union Carbide Corp. deals with a blend of secondary alcohols and the other by Matson(6)... 

SAE, in general, have far lower pour points than those of primary alcohols(PA). Among three secondary alcohol series with different carbon number ranges, the lower the carbon number range, the lower the pour point, especially in the lower HLB or water-insoluble region. 

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