ASTM E-10:2015: Standard Test Method for Brinell Hardness of Metallic Materials

ASTM E-10:2015: Standard Test Method for Brinell Hardness of Metallic Materials ...

ASTM D 7337:2012-Standard Test Method for Tensile Creep Rupture of Fiber Reinforced Polymer Matrix Composite Bars

ASTM D 7337:2012-Standard Test Method for Tensile Creep Rupture of Fiber Reinforced Polymer Matrix Composite Bars ...

پکیج کامل استاندارد ASTM سری B تا 2010 شامل 738 فایل pdf

پکیج کامل استاندارد ASTM سری B تا 2010 شامل 738 فایل pdf ...

استاندارد ASTM A 503 در خصوص انجام تست آلتراسونیک بر روی Forged CrackingShafts

  استاندارد ASTM A 503 در خصوص انجام تست آلتراسونیک بر روی Forged Cracking Shafts     Scope 1.1 This is an acceptance specification for the ultrasonicinspection of forged steel crankshafts having main bearingjournals or crankpins 4 in. [100 mm] or larger in diameter.1.2 This specification covers the testing equipment requiredand the test procedure to be followed, and it defines the criticaland noncritical areas and limits of acceptance.1.3 This specification is intended to cover both continuousgrain flow (CGF) crankshafts for medium and high speeddiesel engines as well as solid (slab) forged crankshafts forother applications.1.4 The values stated in either inch-pound units or SI(metric) units are to be regarded separately as the standard.Within the text and tables, the SI un ...

استاندارد ASTM A 983 در خصوص Continuous Grain Flow Forged Carbon and Alloy Steel Crankshafts for Medium Speed Diesel Engines

  استاندارد ASTM A 983 در خصوص Continuous Grain Flow Forged Carbon and Alloy Steel Crankshafts for Medium Speed Diesel Engines     Scope 1.1 This specification covers continuous grain flow forgedcarbon and alloy steel crankshafts for medium speed diesel andnatural gas engines.1.2 The steel used in the manufacture of the forgings isrequired to be vacuum degassed.1.3 Provision is made for treatment of designated surfacesof the crankshaft to provide enhanced fatigue strength, or wearresistance, or both.1.4 The values stated in either inch-pound units or SI(metric) units are to be regarded separately as standards.Within the text and tables the SI units are shown in brackets.The values stated in each system are not exact equivalents,therefore each system must be used independe ...

استاندارد ASTM D5966 در خصوص Evaluation of Engine Oils for Roller Follower Wear in Light-Duty Diesel Engine

    استاندارد ASTM D5966 در خصوص Evaluation of Engine Oils for Roller Follower Wear in Light-Duty Diesel Engine نسخه 2013 19 صفحه   Scope 1.1 This engine lubricant test method is commonly referredto as the Roller Follower Wear Test. Its primary result, rollerfollower shaft wear in the hydraulic valve lifter assembly, hasbeen correlated with vehicles used in stop-and-go deliveryservice prior to 1993. It is one of the test methods required toevaluate lubricants intended to satisfy the API CG-4 performance category. This test has also been referred to as the 6.2 LTest.1.2 The values stated in SI units are to be regarded asstandard. No other units of measurement are included in thisstandard.1.2.1 Exceptions—Where there is no direct SI equivalent,such as pipe fitti ...

استاندارد ASTM G181 در خصوص Conducting Friction Tests of Piston Ring and Cylinder Liner Materials Under Lubricated Conditions

  استاندارد ASTM G181 در خصوص Standard Test Method for Conducting Friction Tests of Piston Ring and Cylinder Liner Materials Under Lubricated Conditions نسخه 2011 10 صفحه   Scope 1.1 This test method covers procedures for conductinglaboratory bench-scale friction tests of materials, coatings, andsurface treatments intended for use in piston rings and cylinderliners in diesel or spark-ignition engines. The goal of thisprocedure is to provide a means for preliminary, cost-effectivescreening or evaluation of candidate ring and liner materials. Areciprocating sliding arrangement is used to simulate thecontact that occurs between a piston ring and its mating linernear the top-dead-center position in the cylinder where liquidlubrication is least effective, and most wear is known ...

دانلود مقاله دسته بندی مواد افزودنی بتن در استاندارد ASTM C494

لینک و پرداخت دانلود * پایین مطلب *   فرمت فایل : word ( قابل ویرایش )   تعداد صفحه : 5         مقدمه    استانداردهای مختلف از جمله BS و ASTM اقدام به دسته بندی انواع افزودنی های بتن نموده اند. این دسته بندی در استاندارد ASTM تحت عنوان ASTM C494 بشرح ذیل در 7 گروه انجام  شده است: Type A – افزودنی کاهنده آب (Water reducing admixture) این مواد که اصطلاحا موسوم به روان کننده میباشند باعث کاهش آب طرح اختلاط بتن می شوند . Type B – افزودنی تاخیر دهنده گیرش (Retarding admixture) این مواد که به نام دیرگیر بتن شناخته می شوند، باعث به تعویق افتادن زمان گیرش اولیه و نهائی بتن می شوند . Type C – افزودنی تسریع کننده گیرش (Accelerating admixture) این مواد که به نام زودگیر بتن مشهور می باشند، باعث کاهش زمان گیرش اولیه و نهائی بتن ...