JIS G Hot-rolled mild steel plates, sheet and strip. SPHC max. max. max. max. min. 27min. 29min. 29min. 29min. 31min. 31min. Drawing. SPHD max. max. max. max. Code of type. Applicable thickness (mm). Applications. JIS G Hot-rolled soft steel sheet/strip. SPHC. or more, but no more than General use. SPHD.

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Table 2 Chemical composition Unit: Tensile strength and elongation are specified. Sampling position and direction of tensile test and bend test pieces The test piece mis be taken parallel to the rolling direction and the centre of the test piece shall be at a quarter-width from a side edge.

JIS C Test m Mechanical properties At the time that the steel is made available for shipment, the mechanical properties shall be as given in Annex Table 2, when they are determined on test pieces obtained in accordance with the requirements jix 6.

The repair by welding shall not be performed.

When the mass of one test lot exceeds 50 t, however, two sets of test pieces shall be taken from the lot. In addition, the drawability of SPHE may be agreed between the purchaser and supplier. Please refer following information: Chemical composition of JIS G 7. When the mass of one test lot exceeds 50 t, however, two sets of test piece shall be taken from the lot. In the case, the report shall be in accordance with the requirements of clause 13 in JIS G To minimize this effect, quality HR4 should be specified.

Hi there, could you advise on the silicon content percentage of ?

JIS G 3131 – 2010

Identical Identical 11 Marking Marking of five items is specified. JSA All rights reserved. The commercial quality hot rolled steel is a type of steel that can be used commercially for forming purposes that can also include shearing of a metallic sheet. Marking of seven items is specified. Chemical composition The chemical composition cast analysis shall not exceed the value given in Annex Table 1. A part of them is presented as given in Informative reference Table 1, accordingly.


Small cracks on the edges of test piece, and cracks not visible to the naked eye shall be disregarded. The shape, dimensions and mass shall conform to the requirements specified in clause 6.

The appearance shall conform to the requirements specified in clause 8.

JIS G 3131-Commercial Hot Rolled SPHC Steels

Deletes the specification item s or content s of International Standard. Drawing qualities quality HR2 – drawing quality HR3 -deep drawing quality HR4 – deep drawing quality special killed 1. The tolerances on thickness of the steel sheet which is not manufactured from the steel coil may be agreed between the purchaser and supplier. jiw

Sam pIing frequency of the tensile test piece is specified. No item For addition of the specification of the report, proposal will be submitted to ISO. Therefore we cannot say that yield and UTS are close, when steel is not absolutely brittle.

For steel sheet excluding cut lengths thereof One test piece each for tensile and bend tests shall be taken from each test lot of the same heat where the maximum thickness of the steel sheet is within twice the minimum thickness thereof. Shape, dimensions, mass and tolerances The shape, dimensions, mass and their tolerances of the steel and coil shall conform to JIS G With this, respect, tolerances on length for the steel sheet and those on width for the cut edged steel sheet shall, unless otherwise specified, be in accordance with the tolerance A, and tolerances on thickness for the steel sheet and coil shall be as specified in Table 4.

JIS G is a Japanese material standard for hot rolled steel. Chemical composition of Deletion four elements C, Mn, P, S and additional alloy elements are specified. However, JIS G Inspection observed by the purchaser is specified. The chemical composition shall conform to the requirements specified in clause 4. Alters the specification content s which are included in International Standard.


For steels other than the mild steel plate, sheet and strip, ISO should be referred. In JIS, items related to quality are specified.

The bent test shall be carried out at ambient temperature and in accordance with ISO Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. Chemical composition The steel sheet and coil shall be tested in accordance with 7. It is not suitable for applications where surface is of prime importance.

The roller does not only decrease the thickness of the sheets but also changes the grain structure of the steels.

JIS G – – Free Download PDF

Analytical test is specified. The steel sheet and coil from which the scale has g31331 removed after the hot-rolling operation by picking or grit blasting may be shipped on request by the purchaser. Grade and symbol The steel and coil shall be classified into 3 categories, and their symbols shall be as given in Table 1.

Judgement of the reinspection is specified. The portions with continuous sidelines or dotted underlines are the matters in which the content of the corresponding International Standard has been modified. A lot consist of 50 t or less of sheet of the same designation rolled to the same thickness and condition.

Hot Rolling of Wide St In JIS, a part of items are deleted. In the case of bend test, it shall bent without crack on the outside of the bent portion.