{"id":63279,"date":"2024-10-17T12:10:53","date_gmt":"2024-10-17T12:10:53","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/astm-d4684-2007\/"},"modified":"2024-10-24T18:09:34","modified_gmt":"2024-10-24T18:09:34","slug":"astm-d4684-2007","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/astm\/astm-d4684-2007\/","title":{"rendered":"ASTM-D4684 2007"},"content":{"rendered":"

ASTM D4684-07e1<\/h3>\n

Historical Standard: Standard Test Method for Determination of Yield Stress and Apparent Viscosity of Engine Oils at Low Temperature<\/h4>\n
\n

ASTM D4684<\/h4>\n

Scope<\/strong><\/p>\n

1.1 This test method covers the measurement of the yield stress and viscosity of engine oils after cooling at controlled rates over a period exceeding 45 h to a final test temperature between \u2013<\/span>10 and \u2013<\/span>40\u00b0<\/span>C. The viscosity measurements are made at a shear stress of 525 Pa over a shear rate of 0.4 to 15 s\u2013<\/span>1<\/sup>. The viscosity as measured at this shear stress was found to produce the best correlation between the temperature at which the viscosity reached a critical value and borderline pumping failure temperature in engines.<\/p>\n

1.2 Procedure A of this test method has precision stated for a yield range from less than 35 Pa to 210 Pa and apparent viscosity range from 4300 to 270 000 mPa\u00b7<\/span>s. The test procedure can determine higher yield stress and viscosity levels.<\/p>\n

1.3 This test method is applicable for unused oils, sometimes referred to as fresh oils, designed for both light duty and heavy duty engine applications. It also has been shown to be suitable for used diesel and gasoline engine oils. The applicability to petroleum products other than engine oils has not been determined.<\/p>\n

1.4 This test method uses the milliPascal second (mPa\u00b7<\/span>s) as the unit of viscosity. For information, the equivalent unit, centiPoise (cP), is shown in parentheses.<\/p>\n

1.5 This test method contain two procedures: Procedure A incorporates several equipment and procedural modifications from Test Method D 4684\u2013<\/span>02 that have shown to improve the precision of the test, while Procedure B is unchanged from Test Method D 4684\u2013<\/span>02. Additionally, Procedure A applies to those instruments that utilize thermoelectric cooling technology and those that use indirect refrigeration technology of recent manufacture for instrument temperature control. Procedure B can use the same instruments used in Procedure A or those cooled by circulating methanol.<\/p>\n

1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.<\/span><\/p>\n

Keywords<\/strong><\/p>\n

low temperature flow properties; low temperature viscosity; mini-rotary viscometer; pumping viscosity; used diesel engine oil; viscosity; yield stress; Calibration–petroleum analysis instrumentation; Cooling characteristics\/profiles; Fuel oils; Newtonian fluids; Non-Newtonian fluids; Shear testing–petroleum products; Stress; Temperature tests–petroleum products; Viscometers–mini-rotary; Viscosity–petroleum products; Yield stress<\/p>\n

ICS Code<\/strong><\/p>\n

ICS Number Code 75.100 (Lubricants, industrial oils and related products)<\/p>\n

DOI:<\/strong> 10.1520\/D4684-07E01<\/p>\n<\/div>\n

PDF Catalog<\/h4>\n\n\n\n\n\n\n\n\n\n\n\n\n
PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
1<\/td>\nScope
Referenced Documents
Terminology <\/td>\n<\/tr>\n
2<\/td>\nSummary of Test Method
Significance and Use
Apparatus <\/td>\n<\/tr>\n
3<\/td>\nReagents and Materials
Sampling
Calibration and Standardization <\/td>\n<\/tr>\n
4<\/td>\nYield Stress and Viscosity Measurement Procedure <\/td>\n<\/tr>\n
6<\/td>\nCalculation of Yield Stress and Apparent Viscosity
Report
Precision and Bias <\/td>\n<\/tr>\n
7<\/td>\nCalibration and Standardization
Procedure <\/td>\n<\/tr>\n
9<\/td>\nCalculation of Yield Stress and Apparent Viscosity
Report
Precision and Bias <\/td>\n<\/tr>\n
10<\/td>\nKeywords
X1. TEMPERATURE PROFILES FOR TEST TEMPERATURES
X1.1 <\/td>\n<\/tr>\n
11<\/td>\nX2. SUPPORTING OPERATIONAL INFORMATION
X2.1
TABLE X1.1
TABLE X1.2
TABLE X1.3 <\/td>\n<\/tr>\n
12<\/td>\nX2.2
X2.3
X2.4
X2.5
REFERENCES <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

D4684-07e1 Standard Test Method for Determination of Yield Stress and Apparent Viscosity of Engine Oils at Low Temperature<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
ASTM<\/b><\/a><\/td>\n2007<\/td>\n13<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":63280,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2637],"product_tag":[],"class_list":{"0":"post-63279","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-astm","8":"first","9":"instock","10":"sold-individually","11":"shipping-taxable","12":"purchasable","13":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/63279","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/63280"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=63279"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=63279"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=63279"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}