SWRCHB526

The actual basis is the original Japanese version of JIS G3508-1:2005; This is not a verification conclusion based on the official original text of the 2010 edition. This record covers SWRCHB feedstock wire rod.; The delivery condition, mechanical properties, and applicable standards of SWCHB wire after processing must be confirmed separately; they shall not be automatically interchanged or used to create new supply commitments. B only specifies a lower limit ≥0.0008%, and the original table has no upper limit; general boron upper limits shall not be entered; Unlisted elements shall not be filled as 0. Note to Table 2 in the main text: Cr≤0.20%, impurities Cu≤0.30%, Ni≤0.20%; Default Si is 0.10–0.35%; specific requirements for Si below 0.10% shall be determined separately by agreement. B≥0.0005% is only an agreement option for Note 2 of Table 2 and cannot replace the default ≥0.0008%; Current composition conditions may be selected individually. 6.1: Average decarburization depth applies only when inspection is specified by the buyer: for d≤15mm, ferritic/total decarburization ≤0.02/0.15mm; for 15<d≤25mm, ≤0.03/0.20mm; for 25<d≤32mm, ≤0.04/0.25mm; for d>32mm, as agreed.. 6.2 Hardenability applies only when the test distance and upper/lower limits are specified by the buyer, according to Table 6-17 of this edition; Specific Jominy hardness bands have not yet been incorporated cell by cell; they shall not be treated as fixed delivery hardness, nor shall H-suffix grades be created. Default surface defect depth ≤ 0.10mm; Stricter surface quality and dimensional accuracy shall be subject to a separate agreement. Grain size and non-metallic inclusions shall be specified by the buyer, with limits agreed upon by both parties.

One of the 12 official wire rod grades in Table 1, Clause 3 of the Japanese original version of JIS G 3508-1:2010; Table 2 is heat analysis mass fraction wt%. ; Table 2 of the main text defaults to B≥0.0008%, with no upper limit specified.; B≥0.0005% is applicable only by agreement between both parties and cannot replace the default value. ; Table 2 of the main text defaults to Si 0.10—0.35%; Si below 0.10% must be separately determined by agreement between both parties. ; Table 2 of the main text: for all steel grades, Cu≤0.30%, Ni≤0.20%, Cr≤0.20%; These three limits do not apply to informative Annex JB. ; Clause 6.1 decarburization and Clause 6.2 hardenability are both applicable when specified by the buyer; The hardness bands at each test distance in Tables 6—17 have not yet been structured; they must not be treated as fixed delivery hardness.. ; This record covers SWRCHB feedstock wire rod.; SWCHB wire shall be verified separately according to its product standard, condition, and contract.