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Il s'agit de fabriquer des panneaux muraux, des économiseurs, des réchauffeurs, des surchauffeurs et des conduites de vapeur de chaudières.
Les tubes en alliage résistant aux basses températures sont des produits sans soudure, mianly le tuyau en acier fini a une bonne résistance aux chocs dans un environnement à basse température (généralement en dessous de -45 ℃).
L'utilisation d'un acier de haute pureté à faible teneur en soufre et à faible teneur en phosphore et un traitement de calcification peuvent réduire efficacement la fragilité à basse température de l'acier et améliorer la résistance aux chocs du produit.
|
Product |
Alloy Steel Tube |
|
Application |
In Refineries, Power Plants, Boilers, Heat Exchangers, Condensers etc. |
|
Pipe Standard |
ASME SA 335/ASTM A333/ASME SA333 |
|
Size |
OD: 73-630mm |
|
WT: 6-35mm |
|
|
Length: Single Random, Double Random, Cut Length |
ASME SA 335 American society of mechanical engineers;
ASTM A333 is for Seamless and Welded Steel Pipe for Low-Temperature Service and Other Applications with Required Notch Toughness
|
Grade |
UNS Designation |
Composition, % |
||||||
|
C |
Mn |
P |
S |
Si |
Cr |
Mo |
||
|
P1 |
K11522 |
0.10–0.20 |
0.30–0.80 |
≤0.025 |
≤0.025 |
0.10–0.50 |
- |
0.44–0.65 |
|
P2 |
K11547 |
0.10–0.20 |
0.30–0.61 |
≤0.025 |
≤0.025 |
0.10–0.30 |
0.50–0.81 |
0.44–0.65 |
|
P5 |
K41545 |
≤0.15 |
0.30–0.60 |
≤0.025 |
≤0.025 |
≤0.50 |
4.00–6.00 |
0.44–0.65 |
|
P9 |
S50400 |
≤0.15 |
0.30–0.60 |
≤0.025 |
≤0.025 |
0.25–1.00 |
8.00–10.00 |
0.90–1.10 |
|
P11 |
K11597 |
0.05–0.15 |
0.30–0.60 |
≤0.025 |
≤0.025 |
0.50–1.00 |
1.00–1.50 |
0.44–0.65 |
|
P12 |
K11562 |
0.05–0.15 |
0.30–0.61 |
≤0.025 |
≤0.025 |
≤0.50 |
0.80–1.25 |
0.44–0.65 |
|
P15 |
K11578 |
0.05–0.15 |
0.30–0.60 |
≤0.025 |
≤0.025 |
1.15–1.65 |
- |
0.44–0.65 |
|
P21 |
K31545 |
0.05–0.15 |
0.30–0.60 |
≤0.025 |
≤0.025 |
≤0.50 |
2.65–3.35 |
0.80–1.06 |
|
P22 |
K21590 |
0.05–0.15 |
0.30–0.60 |
≤0.025 |
≤0.025 |
≤0.50 |
1.90–2.60 |
0.87–1.13 |
|
P23 |
K41650 |
0.04–0.10 |
0.10–0.60 |
≤0.030 |
≤0.010 |
≤0.50 |
1.90–2.60 |
0.05–0.30 |
|
P91 |
K91560 |
0.08–0.12 |
0.30–0.60 |
≤0.020 |
≤0.010 |
0.20–0.50 |
8.00–9.50 |
0.85–1.05 |
|
P92 |
K92460 |
0.07–0.13 |
0.30–0.60 |
≤0.020 |
≤0.010 |
≤0.50 |
8.50–9.50 |
0.30–0.60 |
|
Grade |
Composition, % |
||||||
|
C |
Mn |
P |
S |
Si |
Cr |
Ni |
|
|
Grade 1 |
≤0.30 |
0.40-1.06 |
≤0.025 |
≤0.025 |
- |
- |
- |
|
Grade 3 |
≤0.19 |
0.31-0.64 |
≤0.025 |
≤0.025 |
0.18-0.37 |
- |
3.18-3.82 |
|
Grade 4 |
≤0.12 |
0.50-1.05 |
≤0.025 |
≤0.025 |
0.18-0.37 |
0.44-1.01 |
0.47-0.98 |
|
Grade 6 |
≤0.30 |
0.29-1.06 |
≤0.025 |
≤0.025 |
≥0.10 |
- |
- |
|
Grade 7 |
≤0.19 |
≤0.90 |
≤0.025 |
≤0.025 |
0.13-0.32 |
- |
2.03-2.57 |
|
Grade 8 |
≤0.13 |
≤0.90 |
≤0.025 |
≤0.025 |
0.13-0.32 |
- |
8.40-9.60 |
|
Grade 9 |
≤0.20 |
0.40-1.06 |
≤0.025 |
≤0.025 |
- |
- |
1.60-2.24 |
|
Grade 10 |
≤0.20 |
1.15-1.50 |
≤0.030 |
≤0.015 |
0.10-0.35 |
≤0.15 |
≤0.25 |
|
Grade 11 |
≤0.10 |
≤0.60 |
≤0.025 |
≤0.025 |
≤0.35 |
≤0.50 |
35.0-37.0 |
|
*For Grade 1 and 6, each reduction of 0.01% C below 0.30%, an increase of 0.05 % Mn above 1.06 % would be permitted to a max. of 1.35%. |
|||||||
|
*For Grade 6, the limit for columbium may be increased up to 0.05 % on heat analysis and 0.06 % on product analysis. |
|||||||
|
*Generally, the carbon equivalent C.E = [C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15] shall not exceed 0.43% by heat analysis. |
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