收藏词条 编辑词条 预应力钢丝及钢绞线用热轧盘条(YB/T146-1998)
(2)尺寸规格盘条的尺寸规格及允许偏差应在合同中注明,未注明者,应符合GB/T14981中B级的规定。
(3)牌号和化学成分见表1。
表1 预应力钢丝及钢绞线用热轧盘条的牌号和化学成分
牌 号 |
化学成分(质量分数)(%) |
|||||
C |
Si |
Mn |
P |
S |
Cu |
|
|
0.70~0.75 |
0.12~0.32 |
0.30~0.60 |
≤0.025 |
≤0.025 |
≤0.20 |
72MnA |
0.70~0.75 |
0.12~0.32 |
0.60~0.90 |
≤0.025 |
≤0.025 |
≤0.20 |
|
0.73~0.78 |
0.12~0.32 |
0.30~0.60 |
≤0.025 |
≤0.025 |
≤0.20 |
75MnA |
0.73~0.78 |
0.12~0.32 |
0.60~0.90 |
≤0.025 |
≤0.025 |
≤0.20 |
|
0.75~0.80 |
0.12~0.32 |
0.30~0.60 |
≤0.025 |
≤0.025 |
≤0.20 |
77MnA |
0.75~0.80 |
0.12~0.32 |
0.60~0.90 |
≤0.025 |
≤0.025 |
≤0.20 |
|
0.78~0.83 |
0.12~0.32 |
0.30~0.60 |
≤0.025 |
≤0.025 |
≤0.20 |
80MnA |
0.78~0.83 |
0.12~0.32 |
0.60~0.90 |
≤0.025 |
≤0.025 |
≤0.20 |
|
0.80~0.85 |
0.12~0.32 |
0.30~0.60 |
≤0.025 |
≤0.025 |
≤0.20 |
82MnA |
0.80~0.85 |
0.12~0.32 |
0.60~0.90 |
≤0.025 |
≤0.025 |
≤0.20 |
(4)力学性能见表2。
牌 号 |
力学性能 |
|||
抗拉强度 ób/MPa |
断面收缩率妒ψ(%) |
抗拉强度ób/MPa |
断面收缩率ψ(%) |
|
直径8.0~10 |
直径10.5~13 |
|||
|
960~1080 |
≥25% |
940~1060 |
≥25% |
72MnA |
990~1110 |
970~1090 |
||
75MnA |
1020~1140 |
1000~1120 |
||
77MnA |
1040~1160 |
1020~1140 |
||
80MnA |
1060~1180 |
1040~1160 |
||
82MnA |
1080~1200 |
1060~l180 |