預應力鋼絲及鋼絞線用熱軋盤條(YB/T146--1998)用於製造預應力鋼絲及鋼絞線。
簡介
(2)尺寸規格盤條的尺寸規格及答應偏差應在契約中註明,未註明者,應符合GB/T14981中B級的規定。(3)牌號和化學成分。預應力鋼絲及鋼絞線用熱軋盤條的牌號和化學成分
牌 號 | 化學成分(質量分數)(%) | |||||
C | Si | Mn | P | S | Cu | |
72A | 0.70~0.75 | O.12~0.32 | 0.30~O.60 | ≤O.025 | ≤O.025 | ≤O.20 |
72MnA | 0.70~0.75 | O.12~O.32 | 0.60~O.90 | ≤O.025 | ≤O.025 | ≤O.20 |
75A | O.73~O.78 | O.12~O.32 | 0.30~O.60 | ≤O.025 | ≤0.025 | ≤O.20 |
75MnA | O.73~O.78 | O.12~0.32 | 0.60~0.90 | ≤0.025 | ≤0.025 | ≤O.20 |
77A | O.75~0.80 | O.12~0.32 | O.30~0.60 | ≤0.025 | ≤0.025 | ≤O.20 |
77MnA | 0.75~0.80 | 0.12~0.32 | 0.60~0.90 | ≤O.025 | ≤O.025 | ≤0.20 |
80A | 0.78~O.83 | 0.12~O.32 | O.30~O.60 | ≤O.025 | ≤O.025 | ≤O.20 |
80MnA | O.78~O.83 | O.12~O.32 | 0.60~O.90 | ≤O.025 | ≤O.025 | ≤0.20 |
82A | O.80~O.85 | 0.12~O.32 | 0.30~O.60 | ≤O.025 | ≤O.025 | ≤O.20 |
82MnA | O.80~O.85 | O.12~O.32 | O.60~0.90 | ≤O.025 | ≤O.025 | ≤0.20 |
(4)力學性能。預應力鋼絲及鋼絞線用熱軋盤條的力學性能
牌 號 | 力學性能 | |||
抗拉強度ób/MPa | 斷面收縮率妒ψ(%) | 抗拉強度ób/MPa | 斷面收縮率ψ(%) | |
直徑8.0~10.0mm | 直徑10.5~13.0mm | |||
72A | 960~1080 | ≥25% | 940~1060 | ≥25% |
72MnA 75A | 990~lllO | 970~1090 | ||
75MnA 77A | 1020~1140 | 1000~1120 | ||
77MnA 80A | 1040~1160 | 1020~1140 | ||
80MnA 82A | 1060~1180 | 1040~1160 | ||
82MnA | 1080~1200 | 1060~l180 |