 |
Standard: ASTM A333/A333M Steel grede: 1,3,4,6,7,8,9,11 Size: OD(6-80mm)×WT(0.8-12mm) Application: Low temperature operation |
Chemical composition:
Grade 1 3 4 6 7 8 9 10 11 C, max 0.3 0.19 0.12 0.3 0.19 0.13 0.2 0.2 0.1 Mn 0.40-1.06 0.31-0.64 0.5-1.05 0.29-1.06 0.9,max 0.9,max 0.4-1.06 1.15-1.5 0.6,max P, max 0.025 0.025 0.025 0.025 0.025 0.025 0.025 0.035 0.025 S, max 0.025 0.025 0.025 0.025 0.025 0.025 0.025 0.025 0.025 Si ... 0.18-0.37 0.08-0.37 0.1,min 0.13-0.32 0.13-0.32 ... 0.1-0.35 0.35,max Ni ... 3.18-3.82 0.47-0.98 ... 2.03-2.57 8.4-9.6 1.6-2.24 0.25,max 35-37 Cr ... ... 0.44-1.01 ... ... ... ... 0.15,max 0.5,max Cu ... ... 0.4-0.75 ... ... ... 0.75-1.25 0.15,max ... Al ... ... 0.04-0.3 ... ... ... ... 0.06,max ... V, max ... ... ... ... ... ... ... 0.12 ... Nb, max ... ... ... ... ... ... ... 0.05 ... Mo, max ... ... ... ... ... ... ... 0.05 0.5,max Co ... ... ... ... ... ... ... ... 0.5,max Mn 0.40-1.06 0.31-0.64 0.5-1.05 0.29-1.06 0.9,max 0.9,max 0.4-1.06 1.15-1.5 0.6,max
Mechanical properties
Grade 1 3 4 6 7 8 9 10 11 Tensile strength, min, Mpa 380 450 415 415 450 690 435 550 450 Yield strength, min, Mpa 205 240 240 240 240 515 315 450 240 Elongation, min (s≥8mm) 35% 30% 30% 30% 30% 22% 28% 22% 18% Elongation, min, (Standard circle) 28% 22% 22% 22% 22% 16% ... 16% ... Elongation(s<8mm) Percentage reduction from basic each reduction of 8mm of wall thickness 1.75 1.5 1.5 1.5 1.5 1.25 1.5 1.25
Impact properties
|
size |
Minimum average gap of each the three specimens （J） |
Minimum gap of each one specimens （J） |
|
10×10 |
18 |
14 |
|
10×7.5 |
14 |
11 |
|
10×6.67 |
12 |
9 |
|
10×5 |
9 |
7 |
|
10×3.33 |
7 |
4 |
|
10×2.5 |
5 |
4 |