●力學(xué)性能：
抗拉強(qiáng)度 σb (MPa)：淬火回火,≥735
條件屈服強(qiáng)度 σ0.2 (MPa)：淬火回火,≥540
伸長(zhǎng)率 δ5 (%)：淬火回火,≥12
斷面收縮率 ψ (%)：淬火回火,≥40
沖擊功 Akv (J)：淬火回火,≥24
硬度 ：退火,≤235HB;淬火回火,≥217HB
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