250Y40 - AS /NZS 3678-2016

牌号	250Y40
對應标準	AS /NZS 3678-2016 熱軋結構鋼闆、波紋闆和厚闆 Structural steel - Hot-rolled plates, floorplates and slabs
歸類	合金鋼

250Y40 化學元素成分含量(%)

成分	C	Si	Mn	P	S	Cr	Ni	Cu	Mo	Ti	V	Nb	Al	更多
最小值	-	-	-	-	-	-	-	-	-	-	-	-	-	Nb+V≤0.06；Cr+Ni+Cu+Mo≤1；Ceq≤0.44
最大值	0.22	0.5	1.7	0.04	0.03	0.25	0.3	0.4	0.08	0.04	0.05	0.02	0.1	Nb+V≤0.06；Cr+Ni+Cu+Mo≤1；Ceq≤0.44

①The use of sulfide modification steelmaking techniques (such as Ca addition) is permitted for listed grades
②For Z25 grades sulfur 0. 008% maximllm. Z35 grades sulfur 0.005% maximum.
③Boron shall not be int entionally added to the steel without the agreement of the purchaser

碳當量計算

250Y40 機械性能

條件	熱處理或狀态	抗拉強度 σ_b	屈服點 σ_s	斷後伸長率或延伸率 δ %
闆材和底闆(地闆用花紋闆);t≤8	熱軋	≥410	≥280	≥22
闆材和底闆(地闆用花紋闆);8<t≤12	熱軋	≥410	≥260	≥22
闆材和底闆(地闆用花紋闆);12<t≤50	熱軋	≥410	≥250	≥22
闆材和底闆(地闆用花紋闆);50<t≤80	熱軋	≥410	≥240	≥22
闆材和底闆(地闆用花紋闆);80<t≤150	熱軋	≥410	≥230	≥22
闆材和底闆(地闆用花紋闆);150<t≤200	熱軋	≥400	≥220	≥21

①For test piece cross-sectional area > 1000 mm<sup>2</sup>, minimum elongation is reduced by 2%
②Suffix Z added to grade designation indicates that material has been through-thickness tested. Minimum reduction of area: 15% for grade suffix Z15, 25% for grade suffix Z25 and 35% for grade suffix Z35.

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