CN1103379C - Corrosion- and high-temp-resistant stainless steel and its application - Google Patents
Corrosion- and high-temp-resistant stainless steel and its application Download PDFInfo
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- CN1103379C CN1103379C CN 00110254 CN00110254A CN1103379C CN 1103379 C CN1103379 C CN 1103379C CN 00110254 CN00110254 CN 00110254 CN 00110254 A CN00110254 A CN 00110254A CN 1103379 C CN1103379 C CN 1103379C
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Abstract
The present invention discloses stainless steel resisting high temperature and corrosion and application of the stainless steel. The present invention is characterized in that the stainless steel is fundamentally composed of the following chemical components: 25.00 to 12.00 portions of Cr, 1.50 to 0.90 portions of Si, 1.7 to 0.7 portions of Al, 0.025 to 0.03 portions of C, 0.010 to 0.015 portions of N, 0.04 to 0.06 portions of Mn; 0.03 to 0.035 portions of S, 0.25 to 0.02 portions of P and Fe as the rest. The present invention has the characteristics of high yield strength (proof stress) under normal temperature, low ductility, better heat conductivity and small thermal expansion coefficient, and is an ideal heat exchanger heat-transfer pipe and structural member material.
Description
The present invention relates to alloy smelting steel and Application Areas thereof, relate in particular to a kind of corrosion-and high-temp-resistant stainless steel and application thereof.
At present, in the production of China's interchanger, if relate to high-temperature heat-exchanging (more than 800 ℃), for containing for the nickel and stainless steel that interchanger uses, in the unburnt atmosphere of heavy oil, or in the burning coal gas waste gas, owing to be subjected to high temperature corrosion such as sulfur corrosion or vanadium attack.This interchanger life-span sharply reduces.At present, in the production of interchanger, also do not find a kind of suitable steel grade at home, adapt to the heat exchanger heat transfer element material under high-temperature flue gas (950-1000 ℃) high temperature preheating medium (550-650 ℃) state, and cost is lower.
One of purpose of the present invention provides a kind of corrosion-and high-temp-resistant stainless steel.
Two of purpose of the present invention provides the application of above-mentioned corrosion-and high-temp-resistant stainless steel.
Technical scheme of the present invention is finished like this:
A kind of corrosion-and high-temp-resistant stainless steel is characterized in that: stainless steel is formed (weight percent, as follows) by following several chemical ingredientss substantially:
Cr:25.00-12.00; Si:1.50-0.90; Al:1.7-0.7; C:0.03-0.025; N:0.015-0.010; Mn:0.06-0.04; S:0.035-0.03; P:0.025-0.02; All the other are Fe.
The application of above-mentioned corrosion-and high-temp-resistant stainless steel is characterized in that: this steel grade can be made all size tubing and sheet material and be made into interchanger.
The mechanical property of this steel grade see the following form (this steel for embodiment 1 to 3 steel grade)
The mechanical property of corrosion-and high-temp-resistant stainless steel sees the following form:
| Steel grade | Yield-point σ s (N/mm) | Tensile strength sigma b (N/mm) | Elongation δ (%) |
| ?Ocr24SiAl | ≥330 | ≥500 | ≥12 |
| ?Ocr18SiAl | ≥270 | ≥450 | ≥12 |
| ?Ocr13SiAl | ≥250 | ≥400 | ≥12 |
Characteristics of the present invention are: the mechanical property of this steel grade and physicals are compared with representative formula series oxidation steel difficult to understand (SUS304, SUS310S), yield strength (proof stress) height at normal temperatures, and ductility is low.Heat conductivity is better, and thermal expansivity is little, therefore, is ideal very as Exchanger Tubes and structural part material.Scale resistance is good, in heavy oil combustion gas, has very strong erosion resistance.
Embodiment 1:
Embodiment 1 corrosion-and high-temp-resistant stainless steel is to implement like this, and its stainless steel is made up of following chemical ingredients: Cr:24.00; Si:1.40; Al:1.3; C:0.029; N:0.013; Mn:0.05; S:0.032; P:0.023; All the other are Fe, and this steel grade is called the Ocr24SiAl stainless steel, and this steel grade can be made all size tubing and sheet material and be made into interchanger.
Embodiment 2:
Embodiment 2 corrosion-and high-temp-resistant stainless steels are to implement like this, and this steel grade is made up of following chemical ingredients:
Cr:18.00; Si:1.00; Al:1.00; C:0.029; N:0.012; Mn:0.05; S:0.032; P:0.025; All the other are Fe, and this steel grade is called the OCr18SiAl stainless steel, and this steel grade can be made all size tubing and sheet material and be made into interchanger.
Embodiment 3:
Embodiment 3 corrosion-and high-temp-resistant stainless steels are to implement like this, and this steel grade is made up of following chemical ingredients:
Cr:13.00; Si:1.10; Al:1.00; C:0.028; N:0.013; Mn:0.05; S:0.032; P:0.025; All the other are Fe, and this steel grade is called the OCr13SiAl stainless steel, and this steel grade can be made all size tubing and sheet material and be made into interchanger.
Claims (5)
1. corrosion-and high-temp-resistant stainless steel, it is characterized in that: stainless steel is formed (weight percent, as follows): Cr:25.00-12.00 by following several chemical ingredientss substantially; Si:1.50-0.90; Al:1.7-0.7; C:0.03-0.025; N:0.015-0.010; Mn:0.06-0.04; S:0.035-0.03; P:0.025-0.02; All the other are Fe;
2. a kind of corrosion-and high-temp-resistant stainless steel according to claim 1 is characterized in that: the another kind of chemical ingredients composition of stainless steel is: Cr:24.00; Si:1.40; A1:1.3; C:0.029; N:0.013; Mn:0.05; S:0.032; P:0.023; All the other are Fe.
3. a kind of corrosion-and high-temp-resistant stainless steel according to claim 1 is characterized in that: the another kind of chemical ingredients composition of stainless steel is: Cr:18.00; Si:1.00; Al:1.00; C:0.029; N:0.012; Mn:0.05; S:0.032; P:0.025; All the other are Fe.
4. a kind of corrosion-and high-temp-resistant stainless steel according to claim 1 is characterized in that: the another kind of chemical ingredients composition of stainless steel is: Cr:13.00; Si:110; Al:1.00; C:0.028; N:0.013; Mn:0.05; S:0.032; P:0.025; All the other are Fe.
5. the application of above-mentioned corrosion-and high-temp-resistant stainless steel is characterized in that: this steel grade can be made all size tubing and sheet material and be made into interchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00110254 CN1103379C (en) | 2000-03-24 | 2000-03-24 | Corrosion- and high-temp-resistant stainless steel and its application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00110254 CN1103379C (en) | 2000-03-24 | 2000-03-24 | Corrosion- and high-temp-resistant stainless steel and its application |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1266910A CN1266910A (en) | 2000-09-20 |
| CN1103379C true CN1103379C (en) | 2003-03-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00110254 Expired - Fee Related CN1103379C (en) | 2000-03-24 | 2000-03-24 | Corrosion- and high-temp-resistant stainless steel and its application |
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| Country | Link |
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| CN (1) | CN1103379C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101772020B (en) | 2009-01-05 | 2011-12-28 | 华为技术有限公司 | Method and system for authentication processing, 3GPP authentication authorization accounting server and user device |
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- 2000-03-24 CN CN 00110254 patent/CN1103379C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1266910A (en) | 2000-09-20 |
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| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20030319 Termination date: 20110324 |