国内阀门材料常用技术标准 经热处理的马氏体型钢棒或试样的力学性能a
GB/T 20878 中序号 |
统一 数字 代号 |
新 牌 号 | 旧 牌 号 | 组别 | 经淬火回火(见表A.4)后试样的力学性能和硬度 | 退火后钢棒的硬度c | ||||||
规定非比例延伸 强度Rp0.2/(N/mm2) |
抗拉强度Rm /(N/mm2) |
断后伸长率 A/% |
断面收缩率 Zb/% |
冲击吸收功Aku2d /J |
HBW | HRC | HBW | |||||
不 小 于 | 不 大 于 | |||||||||||
96 | S40310 | 12Cr12 | 1Cr12 | 390 | 590 | 25 | 55 | 118 | 170 | — | 200 | |
97 | S41008 | 06Cr13 | 0Cr13 | 345 | 490 | 24 | 60 | — | 183 | |||
98 | S41010 | 12Cr13 | 1Cr13 | 345 | 540 | 22 | 55 | 78 | 159 | — | 200 | |
100 | S41617 | Y12Cr13 | Y1Cr13 | 345 | 540 | 17 | 45 | 55 | 159 | — | 200 | |
101 | S42020 | 20Cr13 | 2Cr13 | 440 | 640 | 20 | 50 | 63 | 192 | — | 223 | |
102 | S42030 | 30Cr13 | 3Cr13 | 540 | 735 | 12 | 40 | 24 | 217 | — | 235 | |
103 | S42037 | Y30Cr13 | Y3Cr13 | 540 | 735 | 8 | 35 | 24 | 217 | — | 235 | |
104 | S42040 | 40Cr13 | 4Cr13 | — | — | — | — | — | — | 50 | 235 | |
106 | S43110 | 14Cr17Ni2 | 1Cr17Ni2 | 1080 | 10 | — | 39 | — | — | 285 | ||
107 | S43120 | 17Cr16Ni2e | 1 | 700 | 900~1050 | 12 | 45 | 25 | — | — | 295 | |
2 | 600 | 800~950 | 14 | |||||||||
108 | S44070 | 68Cr17 | 7Cr17 | — | — | — | — | — | — | 54 | 255 | |
109 | S44080 | 85Cr17 | 8Cr17 | — | — | — | — | — | — | 56 | 255 | |
110 | S44096 | 108Cr17 | 11Cr17 | — | — | — | — | — | — | 58 | 269 | |
111 | S44097 | Y108Cr17 | Y11Cr17 | — | — | — | — | — | — | 58 | 269 | |
112 | S44090 | 95Cr18 | 9Cr18 | — | — | — | — | — | — | 55 | 255 | |
115 | S45710 | 13Cr13Mo | 1Cr13Mo | 490 | 690 | 20 | 60 | 78 | 192 | — | 200 | |
116 | S45830 | 32Cr13Mo | 3Cr13Mo | — | — | — | — | — | — | 50 | 207 | |
117 | S45990 | 102Cr17Mo | 9Cr18Mo | — | — | — | — | — | — | 55 | 269 | |
118 | S46990 | 90Cr18MoV | 9Cr18MoV | — | — | — | — | — | — | 55 | 269 | |
a 表9仅适用于直径、边长、厚度或对边距离小于或等于75mm的钢棒。大于75mm的钢棒,可改锻成75mm的样坯检验或由供需双方协商,规定允许降低其力学性能的数值。 b 扁钢不适用,但需方要求时,由供需双方协商确定。 c 采用750℃退火时,其硬度由供需双方协商。 d 直径或对边距离小于等于16mm的圆钢、六角钢、八角钢和边长或厚度小于等于12mm的方钢、扁钢不做冲击试验。 e 17Cr16Ni2钢的性能组别应在合同中注明,未注明时,由供方自行选择。
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