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  美標(biāo)低溫?zé)o縫管化學(xué)成分|美標(biāo)低溫管化學(xué)成分
| 
 標(biāo)準(zhǔn)  | 
 牌號(hào)  | 
 化學(xué)成分(%)  | ||||||||||
| 
 C  | 
 Si  | 
 Mn  | 
 P  | 
 S  | 
 Cr  | 
 Ni  | 
 Cu  | 
 Mo  | 
 V  | 
 Al  | ||
| 
 ASTM 
A333  | 
 Grade 1  | 
 ≤0.30  | 
 | 
 0.40-1.06  | 
 ≤0.025  | 
 ≤0.025  | 
 | 
 | 
 | 
 | 
 | 
 | 
| 
 Grade 3  | 
 ≤0.19  | 
 0.18-0.37  | 
 0.31-0.64  | 
 ≤0.025  | 
 ≤0.025  | 
 | 
 3.18-3.82  | 
 | 
 | 
 | 
 | |
| 
 Grade 4  | 
 ≤0.12  | 
 0.18-0.37  | 
 0.50-1.05  | 
 ≤0.025  | 
 ≤0.025  | 
 0.44-1.01  | 
 0.47-0.98  | 
 0.40-0.75  | 
 | 
 | 
 0.04-0.30  | |
| 
 Grade 6  | 
 ≤0.30  | 
 ≥0.10  | 
 0.29-1.06  | 
 ≤0.025  | 
 ≤0.025  | 
 | 
 | 
 | 
 | 
 | 
 | |
| 
 Grade 7  | 
 ≤0.19  | 
 0.13-0.32  | 
 ≤0.90  | 
 ≤0.025  | 
 ≤0.025  | 
 | 
 2.03-2.57  | 
 | 
 | 
 | 
 | |
| 
 Grade 8  | 
 ≤0.13  | 
 0.13-0.32  | 
 ≤0.90  | 
 ≤0.025  | 
 ≤0.025  | 
 | 
 8.40-9.60  | 
 | 
 | 
 | 
 | |
| 
 Grade 9  | 
 ≤0.20  | 
 | 
 0.40-1.06  | 
 ≤0.025  | 
 ≤0.025  | 
 | 
 1.60-2.24  | 
 0.75-1.25  | 
 | 
 | 
 | |
| 
 Grade 10  | 
 ≤0.20  | 
 0.10-0.35  | 
 1.15-1.50  | 
 ≤0.03  | 
 ≤0.015  | 
 ≤0.15  | 
 ≤0.25  | 
 ≤0.015  | 
 ≤0.50  | 
 ≤0.12  | 
 ≤0.06  | |
| 
 Grade 11  | 
 ≤0.10  | 
 ≤0.35  | 
 ≤0.6  | 
 ≤0.025  | 
 ≤0.025  | 
 ≤0.50  | 
 35.0-37.0  | 
 | 
 ≤0.50  | 
 | 
 | |
						
  | ||