1、INTERNATIONAL STANDARD IS0 3755 Second edition 1991-10-15 Cast carbon steels for general engineering purposes Aciers au carbone moul they do not necessarily represent the properties of the casting themselves, which may be affected by solidification conditions and rate of cooling during heat treatmen
2、t, which in turn are influenced by casting thickness, size and shape. If the thickness of the casting is considerably greater than 28 mm , the application of the supplementary requirement in 9.6 of IS0 4990:1986 should be taken into consideration. 2 The ambient temperature was taken as 23 “C + 5 “C
3、1) If measurable the upper yield stress, otherwise the 0,2 “/, proof stress. 2) See clause 6. 3) 1 MPa = 1 N/mm*. 4) The W-grades restrict the chemical composition and may be ordered to ensure uniform weldability. 5) For grades 270-480 and 27OW-48OW, the casting will have an I?, of 260 MPa and an R,
4、 of 500 MPa-650 MPa, in sections from 28 mm up to 40 mm. 6) For grades 340-550 and 34OW-55OW, the casting will have an R, of 300 MPa and an R, of 570 MPa-720 MPa, in sections from 28 mm up to 40 mm. 3 j Copyright International Organization for Standardization Provided by IHS under license with ISONo
5、t for ResaleNo reproduction or networking permitted without license from IHS-,-,-IS0 3755:1991(E) -_-_ _ UDC 669.14-I 4 Descriptors: steels, cast steels, heat treatable steels, specifications, mechanical properties, chemical composition Price based on 3 pages .- Copyright International Organization for Standardization Provided by IHS under license with ISONot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
