E7140-KunShan ShanChuan Mould Steel Co.,Ltd

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Third-and domestic and foreign steel mills to establish long-term friendly cooperative partnership: Japan's Hitachi Metals' Hitachi H1TACH1 special steel, Daido Steel Great DA1DO Special Steel, Japan SUS series stainless steel, Sweden UDDEHOLM one-hundred ASSAB tool steel, the German Sa Site special steel, Austria Bluff BOHLER tool steel, the United States, Fen cola FKL special steel and ALCOA" Aluminum, the Japanese high-cycle KOSHUHI special Steel, the German Sa Site special steel, special steel Austria Bluff and other foreign tool steel. Baoshan Iron and Steel Co., Ltd. and China simultaneously, Fushun Fushun Special Steel Co., Ltd., Changcheng Special Steel Co., Ltd. Wuyang Iron and Steel in the long-term cooperation.

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E7140

特性及适用范围：
有高的表面硬度、耐磨性及疲劳强度，并具有良好的耐热性及腐蚀性，淬透性不高。用于制作高耐磨性、高疲劳强度和相当大的强度、处理后尺寸精度高的氮化零件，如仿模、气缸套、齿轮、高压阀门、镗杆、蜗杆、磨床主轴等。但尺寸较大的零件不宜采用。
化学成份：
碳 C ：0.35～0.42
硅 Si：0.20～0.45
锰 Mn：0.30～0.60
硫 S ：允许残余含量≤0.035
磷 P ：允许残余含量≤0.035
铬 Cr：1.35～1.65
镍 Ni：允许残余含量≤0.030
铜 Cu：允许残余含量≤0.030
钼 Mo：0.15～0.25
力学性能：
抗拉强度 σb (MPa)：≥980(100)
屈服强度 σs (MPa)：≥835(85)
伸长率 δ5 (％)：≥14
断面收缩率 ψ (％)：≥50
冲击功 Akv (J)：≥71
冲击韧性值 αkv (J/cm2)：≥88(9)
硬度：≤229HB
试样尺寸：试样毛坯尺寸为30mm
热处理规范及金相组织：
热处理规范：淬火940℃,水冷、油冷;回火640℃,水冷、油冷。
交货状态：以热处理（正火、退火或高温回火）或不热处理状态交货，交货状态应在合同中注明。