ASTM A536-84 (R2019) pdf free download.Standard Specification for Ductile lron Castings.
1.1 This specification covers castings made of ductile iron, also known as spheroidal or nodular iron, which is described as cast iron with the graphite substantially spheroidal in shape and essentially free of other forms of graphite, as defined in Terminology A644.
1.2 No precise quantitative relationship can be stated between the properties of the iron in various locations of the same casting or between the properties of castings and those of a test specimen cast from the same iron (see Appendix X I).
1 .3 The values stated in inch-pound units arc to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1 .4 This international standard was developed in accordance with internationally recognized principles on standard— ication established in the Decision on Principles for the
Development of International Standard.s Guides and Recoininendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Commiuee.
2. Referenced Documents
2.1 ASTM Standards.
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
A644 Terminology Relating to Iron Castings
A732/A732M Specification for Castings. Investment, Carbon and Low Alloy Steel for General Application, and Cobalt Alloy for High Strength at Elevated Temperatures
E8/E8M Test Methods for Tension Testing of Metallic Materials
3. Ordering Information
3.1 Orders for material to this specification shall include the following information:
3.1.1 ASTM designation.
3.1.2 Grade of ductile iron required (see Table 1, and Sections 4 and 9),
3.1.3 Special properties, if required (see Section 7),
3.1.4 If a different number of samples is required (see Section 10),
3.1.5 Certification, if required (see Section 14), and
3.1.6 Special preparation for delivery, if required (see Section 15).
4. Tensile Requirements
4.1 The iron represented by the test specimens shall conform to the requirements as to tensile properties presented in Tables 1 and 2. The irons listed in Table 1 cover those in general use, while those listed in Table 2 are used for special applications (such as pipes. fittings. etc.).
4.2 The yield strength shall be determined at 0.2 % offset by the offset method (see Test Methods E8/E8M). Other methods may be used by mutual consent of the manufacturer and purchaser.
5. Heat Treatment
5.1 The 60-40-18 grade will normally require a full ferritizing anneal. The 120-90-02 and the 100-70-03 grades generally require a quench and temper or a normalize and temper, or an isothermal heat treatment. The other two grades can be met either as-cast or by heat treatment. Ductile iron, which is heat treated by quenching to martensite and tempering, may have substantially lower fatigue strength than as-cast material of the same hardness.ASTM A536 pdf download.