It is to manufacture wall panel, economizer, reheater, superheater and steam pipeline of boilers.
Low temperature resistant alloy tubes are seamless products,mianly the finished steel pipe has good impact toughness in low temperature environment (usually below -45℃).
The use of low sulfur and low phosphorus high purity steel and calcification treatment can effectively reduce the low temperature brittleness of steel and enhance the impact toughness of the product.
|
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. |
|||||||