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  | 
 標準  | 
 牌號  | 
 抗拉強度(MPA)  | 
 屈服強度(MPA)  | 
| 
 ASTM A106  | 
 A  | 
 ≥330  | 
 ≥205  | 
| 
 B  | 
 ≥415  | 
 ≥240  | |
| 
 C  | 
 ≥485  | 
 ≥275  | 
| 
 標準  | 
 牌號  | 
 化學成分  | |||||||||
| 
 C  | 
 Si  | 
 Mn  | 
 P  | 
 S  | 
 Cr  | 
 Mo  | 
 Cu  | 
 Ni  | 
 V  | ||
| 
 ASTM A106  | 
 A  | 
 ≤0.25  | 
 ≥0.10  | 
 0.27~0.93  | 
 ≤0.035  | 
 ≤0.035  | 
 ≤0.40  | 
 ≤0.15  | 
 ≤0.40  | 
 ≤0.40  | 
 ≤0.08  | 
| 
 B  | 
 ≤0.30  | 
 ≥0.10  | 
 0.29~1.06  | 
 ≤0.035  | 
 ≤0.035  | 
 ≤0.40  | 
 ≤0.15  | 
 ≤0.40  | 
 ≤0.40  | 
 ≤0.08  | |
| 
 C  | 
 ≤0.35  | 
 ≥0.10  | 
 0.29~1.06  | 
 ≤0.35  | 
 ≤0.35  | 
 ≤0.40  | 
 ≤0.15  | 
 ≤0.40  | 
 ≤0.40  | 
 ≤0.08  | |
| 
 鋼管種類  | 
 外徑(D)  | 
 壁厚(S)  | ||
| 
 冷拔管  | 
 外徑  | 
 允許公差  | 
 壁厚  | 
 允許公差  | 
| 
 >30~50  | 
 +0.3%  | 
 ≤25  | 
 +10%  | |
| 
 >50~325  | 
 +0.8%  | |||
| 
 熱軋管  | 
 >6~168  | 
 +1.0%  | 
 ≤25  | 
 -10%,+12.5%  | 
						
  | ||