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sum12

中文名sum12

執(zhí)行標準jis g4804-1999

性 能各向異性

應 用銷釘、軸、管接頭及火花塞外套等

sum12易切削鋼

執(zhí)行標準:jis g4804-1999

●特性及適用范圍：

sum12是s-p復合低碳易切削鋼，是現(xiàn)有易切削鋼中含磷量最多的一種，切削性較15號鋼有明顯改善。鋼材的力學性能有明顯的各向異性，冷拉鋼材縱向力學性能與冷拉15號鋼接近，常代替15號鋼制造對力學性能要求不高的各種零件，如螺栓、螺母、銷釘、軸、管接頭及火花塞外套等。

●化學成份：

碳 c ：0.08～0.13

錳 mn：0.60～0.90

硫 s ：0.08～0.13

磷 p ：最大0.040

●力學性能：

抗拉強度 σb (mpa)：(熱軋)390～540; (冷拉)鋼材厚度或直徑 8～20時:530～755; >20～30時:510～735; >30時:490～685

伸長率 δ5 (％)：(熱軋)≥22;(冷軋)≥7.0

斷面收縮率 ψ (％)：(熱軋)≥36

硬度 ：(熱軋)≤170hb;(冷拉)152～217hb

●熱處理規(guī)范及金相組織：

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