ASTM A649-10(R2020) pdf free download

ASTM A649-10(R2020) pdf free download.Standard Specification for Forged Steel Rolls Used for Corrugating Paper Machinery
1. Scope
1.1 This specification 2 covers two kinds of rolls used in machinery for producing corrugated paperboard. Rolls are fabricated of forged bodies and trunnions. The trunnions may be bolted or shrink assembled on one or both ends of the body. A seal weld may be made at the body/trunnion interface. Roll shells are made of carbon/manganese, or low alloy steel as hereinafter described, and are heat treated prior to assembly. Pressure rolls may be ordered surface hardened as Condition H, or without surface hardening as Condition S. Provision is made in Supplementary Requirements S1 and S3 for the optional surface hardening of corrugating rolls. 1.2 Corrugating and pressure rolls made to this specification shall not exceed 30 in. [760 mm] in inside diameter. The wall thickness ofthe roll body shall not be less than 1 ⁄ 12 ofthe inside diameter or 1 in. [25 mm], whichever is greater, but shall not exceed 4 in. [100 mm]. The wall thickness of the corrugating roll is measured at the bottom of the corrugations in the location of the trunnion fit. The maximum design temperature (MDT) of the roll is 600 °F [315 °C] and the maximum allowable working pressure (MAWP) is 250 psi [1.7 MPa]. The minimum design temperature shall be 40 °F [4 °C] for roll wall thicknesses up to 3 in. [75 mm]. For roll wall thicknesses over 3 in. [75 mm] to 4 in. [100 mm], the minimum design temperature shall be 120 °F [50 °C]. The maximum stresses on the roll bodies from the combined internal and external loading are limited to 18 750 psi [129 MPa] for the Class 2 pressure roll bodies, and 20 000 psi [138 MPa] for Class 1A, 1B, or 5 pressure or corrugating roll bodies in Grades 1 or 2. For the trunnions, the maximum stresses from the combined internal and external loading are limited to 15 000 psi [103.4 MPa] for Classes 3 or 4, or 20 000 psi [138 MPa] for Classes 1A, 1B, or 5 in Grade 2 only. The Grade 1 strength level is not permissible for trunnions. 1.3 Referring to Table 1, material to Classes 1A, 1B, or 5 shall be used for the manufactur roll shells, and Class 2 shall be used only for pressure roll shells. Trunnions shall be made from forgings in Classes 1A, 1B, or 5 in Grade 2 strength level as restricted by Footnote B in Table 2 or in forgings in either Class 3 or 4. 1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined. 1.5 Unless the order specifies the applicable “M” specifica- tion designation, the material shall be furnished to the inch- pound units. 1.6 Except as specifically required in this standard, all ofthe provisions of Specification A788/A788M apply. 1.7 This international standard was developed in accor- dance with internationally recognized principles on standard- ization established in the Decision on Principles for the Development of International Standards, Guides and Recom- mendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
3. Ordering Information
3.1 Material supplied to this specification shall conform to the requirements of Specification A788/A788M, which out- lines additional ordering information, manufacturing requirements, testing and retesting methods and procedures, marking, certification, product analysis variations, and addi- tional supplementary requirements. 3.2 In addition to the ordering requirementsof Specification A788/A788M, the purchaser shall include the maximum de- sign temperature (MDT), if lower than 600 °F [315 °C], and the maximum allowable working pressure (MAWP), if lower than 250 psi [1.7 MPa] as allowed in 1.2 of the Scope. 3.3 When ordering pressure rolls the purchaser shall stipu- late the required condition, either surface hardened (Condition H) or as heat treated (Condition S). In the event that the condition is not specified the default condition is H. 3.4 If a corrugating roll is required to be surface hardened by the forging supplier, prior to forming the flutes by the purchaser, the requirements of Supplementary Requirement S1 shall apply. 3.5 If the requirements of this specification are in conflict with the requirements of Specification A788/A788M, then the requirements of this specification shall prevail.