構造用鉻鉬鋼 SCM材系列
鋼種 記號 |
化學成粉 % | ||||||
C | Si | Mn | P | S | Cr | Mo | |
SCM415 | 0.13~0.18 | 0.15~0.35 | 0.60~0.85 | <0.030 | <0.030 | 0.90~1.20 | 0.15~0.30 |
SCM418 | 0.16~0.21 | 0.15~0.35 | 0.60~0.85 | <0.030 | <0.030 | 0.90~1.20 | 0.15~0.30 |
SCM420 | 0.18~0.23 | 0.15~0.35 | 0.60~0.85 | <0.030 | <0.030 | 0.90~1.20 | 0.15~0.30 |
SCM421 | 0.17~0.23 | 0.15~0.35 | 0.60~0.85 | <0.030 | <0.030 | 0.90~1.20 | 0.15~0.30 |
SCM430 | 0.28~0.33 | 0.15~0.35 | 0.60~0.85 | <0.030 | <0.030 | 0.90~1.20 | 0.15~0.30 |
SCM432 | 0.27~0.37 | 0.15~0.35 | 0.60~0.85 | <0.030 | <0.030 | 1.00~1.50 | 0.15~0.30 |
SCM435 | 0.33~0.38 | 0.15~0.35 | 0.60~0.85 | <0.030 | <0.030 | 0.90~1.20 | 0.15~0.30 |
SCM440 | 0.38~0.43 | 0.15~0.35 | 0.60~0.85 | <0.030 | <0.030 | 0.90~1.20 | 0.15~0.30 |
SCM445 | 0.43~0.48 | 0.15~0.35 | 0.60~0.85 | <0.030 | <0.030 | 0.90~1.20 | 0.15~0.30 |
SCM822 | 0.20~0.25 | 0.15~0.35 | 0.60~0.85 | <0.030 | <0.030 | 0.90~1.20 | 0.35~0.45 |
試驗片淬火回火硬度
鋼種 記號 |
試驗片淬火回火硬度 | ||
淬火 | 回火 | 硬度HB | |
SCM415 |
1次850~900油淬 2次800~850油淬 或925保持後 850~900油淬 |
150~200空冷 | 235~321 |
SCM418 |
1次850~900油淬 2次800~850油淬 或925保持後 850~900油淬 |
150~200空冷 | 248~331 |
SCM420 |
1次850~900油淬 2次800~850油淬 或925保持後 850~900油淬 |
150~200空冷 | 262~352 |
SCM421 |
1次850~900油淬 2次800~850油淬 或925保持後 850~900油淬 |
150~200空冷 | 285~375 |
SCM430 | 830~880油冷 | 530~630 急冷 | 241~302 |
SCM432 | 830~880油冷 | 530~630 急冷 | 255~321 |
SCM435 | 830~880油冷 | 530~630 急冷 | 2691~331 |
SCM440 | 830~880油冷 | 530~630 急冷 | 285~362 |
SCM445 | 830~880油冷 | 530~630 急冷 | 302~363 |
SCM822 |
1次850~900油淬 2次800~850油淬 或925保持後 850~900油淬 |
150~200空冷 | 302~415 |