ASTM F3125/F3125M-19 pdf free.Standard Specification for High Strength Structural Bolts and Assemblies, Steel and Alloy Steel, Heat Treated, Inch Dimensions 120 ksi and 150 ksi Minimum Tensile Strength, and Metric Dimensions 830 MPa and 1040 MPa Minimum Tensile Strength.
ASTM F3125 covers chemical, physical and mechanical requirements for quenched and tempered bolts manufactured from steel and alloy steel, in inch and metric dimensions, in two strength grades, two types and two styles.
4. Dimensions
4. 1 Ikad and Body:
4.1.1 Bolts shall conform to the dimensions specified in Table 2 for Heavy Hex or Twist-Off bolts.
4. 1 .2 The thread length shall not be changed except as provided in Supplementary Requirement SI or S2. Other dimensions shall not be changed except in accordance with Supplementary Requirement S2.
S. Product Marking
5. 1 At a minimum, all bolts shall be marked as required in Table 2. Marking shall he on the bolt head and may be raised or depressed at the manufacturer’s option. The marking shall be visible after coating.
5.2 Grade and Type marking, and the nianufacturer’s mark shall be in separate and distinct locations on the head. Other markings, if used, such as private label distributor’s mark shall also be separate and distinct.
6. Chemical Composition
6. 1 120ksi/830MPA Type I bolts shall be carbon steel, carbon boron steel, alloy steel or alloy steel with boron addition at the manufacturer’s option. contorming to the chemical composition specified in Table 3.
6.2 l50ksi/1040MPa bolts Type I shall be alloy steel or alloy steel with boron addition at the manufacturer’s option, conforming to the chemical composition specified in Table 3.
6.3 Type 3 bolts shall be weathering steel and shall conform to the chemical compositions A or B specified in Table 3 or be produced from a material with chemical composition “Bused on Corrosion Index” that has a Corrosion index of 6 or greater. as calculated from the heat analysis, and as described in G 101. Calculation of the Corrosion index shall be done using the predictive method bused on the data of Larabee and Cohurn or the predictive method based on the data of Townsend. (see Guide G101 for methods ot estimating the atmospheric Corrosion resistance of low alloy steels).
6.4 If performed. product analysis made on finished bolts representing each lot shall be within 10% of the value required of the heat analysis. For example; heat analysis C 0.30—0.52 = product analysis C 0.27— 0.57.
6.5 Heats to which bismuth, selenium, tellurium, or lead has been intentionally added shall not be permitted.
6.6 Chemical analysis shall be performed in accordance with A75l.ASTM F3125/F3125M-19 pdf free download.