What is ASTM A574?ASTM A574 is a Specification for Alloy Steel Socket-Head Cap Screws.
CategorySteel Bolting Materials
ScopeThis specification covers the requirements for quenched and tempered alloy steel hexagon socket-head cap screws, 0.060 through 4 in. in diameter where high strength is required.
Ok let's start with ASTM A574 chemical composition.
Grade 4037 (Composition non mandatory)
C0.35 - 0.40
Mn0.70 - 0.90
Si0.15 - 0.35
Mo0.20 - 0.30
Learn more about chemical composition.
Now it's the mechanical properties turn:
1 in diameter103000 lbf min and 81800 lbf proof load (Min)
Learn more about what is tensile strength.
Finished screws39 to 45 HRC
Learn more about what is hardness.
Density7800 - 8000 kg/m3 (around 7.9 g/cm3 or 0.285 lb/in3).
Learn more about density.
Elastic Modulus190 GPa (27557 ksi) - 210GPa (30458 ksi).
Learn more about the Elastic Modulus.
Poisson's Ratio0.27 – 0.30.
Learn more about the poisson ratio.
Allowable StressDepends on the project (And its factor of safety).
Learn more about the what is allowable stress.
My Material's RankWhile engineers will often look for the cheapest material they can use, I took a different approach to material's selection to help newbie students.
I ranked materials according to their yield strengths and ASTM A574 currently ranks 159 in my yield strength index. This means there are other 158 materials that are more resistant.
Note: I've analysed 134 materials in order to create an yield strength index. Check my astm material's comparison post for more details.
ASTM ClassroomAre you having trouble understanding the basics of ASTM?
What is the difference between Code, Standard & Specification?
This video will walk you through:
CitationWhen you need to include a fact or piece of information in an assignment or essay you should also include where and how you found that piece of information.
That gives credibility to your paper and it is sometimes required in higher education.
To make your life (and citation) easier just copy & paste the information below into your assignment or essay:
Luz, Gelson. ASTM A574 Properties (Chem., Mech. & Rankings). Materials Blog. Gelsonluz.com. dd mmmm. yyyy. <URL>
Now replace dd, mmmm and yyyy with the day, month, and year you browsed this page. Also replace URL for the actual url of this page (The < and > stay, ok?). This citation format is based on MLA.
Other ReferencesA 751 Test Methods, Practices, and Terminology for
Chemical Analysis of Steel Products
D 3951 Practice for Commercial Packaging
E 3 Guide for Preparation of Metallographic Specimens
E 112 Test Methods for Determining Average Grain Size
E 384 Test Method for Microindentation Hardness of
F 606 Test Methods for Determining the Mechanical Properties
of Externally and Internally Threaded Fasteners,
Washers, Direct Tension Indicators, and Rivets
F 788/F 788M Specification for Surface Discontinuities of
Bolts, Screws, and Studs, Inch and Metric Series