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An economical heat-resistant austenitic stainless steel

An economical technology of austenitic stainless steel, applied in the field of stainless steel, can solve the problem of high manufacturing cost and achieve the effect of reducing the cost of raw materials

Active Publication Date: 2015-10-21
ZHENSHI GROUP EASTERN SPECIAL STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the Ni content is as high as 19.2-22.0%, and the manufacturing cost is too high

Method used

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  • An economical heat-resistant austenitic stainless steel

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The economical heat-resistant austenitic stainless steel of this embodiment contains the following components in weight percentage: Cr 20.91%, Ni 11.0%, Si 1.59%, N 0.15%, C 0.063%, RE 0.04%, Nb 0.02%, Mn 0.68 %, Cu 0.12%, P 0.023%, S 0.001%, and the balance is Fe.

Embodiment 2

[0036] The economical heat-resistant austenitic stainless steel of this embodiment contains the following components in weight percentage: Cr 20.85%, Ni 10.9%, Si 1.62%, N 0.16%, C 0.092%, RE 0.04%, Nb 0.08%, Mn 0.67 %, Cu 0.11%, P 0.019%, S 0.001%, and the balance is Fe.

Embodiment 3- Embodiment 11

[0038] Refer to Table 1 for the components of the economical heat-resistant austenitic stainless steel in Example 3-Example 11.

[0039] Table 1: Composition list of the economical heat-resistant austenitic stainless steels of Example 3-Example 11.

[0040] components Cr / % Ni / % Si / % N / % C / % RE / % Nb / % Mn / % Cu / % P / % S / % Fe / % Example 3 20 10 1.5 0.14 0.04 0.03 0.01 0.3 0.05 0.020 0.001 margin Example 4 22 12 2.0 0.22 0.12 0.08 0.15 0.8 0.18 0.020 0.001 margin Example 5 21 11 1.7 0.20 0.08 0.05 0.10 0.5 0.1 0.020 0.001 margin Example 6 21 10 1.5 0.14 0.04 0.03 0.01 0.3 0.1 0.020 0.001 margin Example 7 21 12 2.0 0.22 0.12 0.08 0.15 0.8 0.15 0.020 0.001 margin Example 8 20 12 2.0 0.22 0.12 0.08 0.15 0.8 0.12 0.020 0.001 margin Example 9 20 11 1.7 0.20 0.08 0.05 0.10 0.5 0.08 0.020 0.001 margin Example 10 22 10 1.5 0.14 0.0...

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Abstract

The invention relates to economical heat-resisting austenitic stainless steel in the field of stainless steel. The economical heat-resisting austenitic stainless steel comprises the following components by weight percent: 20-22% of Cr (Chromium), 10-12% of Ni (Nickel), 1.5-2.0% of Si (Silicon), 0.14-0.22% of N (Nitrogen), 0.04-0.12% of C (Carbon), 0.03-0.08% of RE (Rhenium), 0.01-0.15% of Nb (Niobium), 0.3-0.8% of Mn (Manganese), not more than 0.2% of Cu (Copper), not more than 0.04% of P (Phosphorus), not more than 0.03% of S (Sulfur), and the balance of Fe (Ferrum). The economical heat-resisting austenitic stainless steel has the advantages and effects that the high temperature lasting strength far exceeds 310S, the high-temperature oxidation resistance reaches the level of 310S austenitic stainless steel, and the weight percent of the noble metal Ni element is greatly reduced. The economical heat-resisting austenitic stainless steel can save nickel, reduce the cost of raw materials, replace the 310S steel containing 20% of nickel, and be widely used for a heating furnace, a heat exchanger, a high-temperature reaction kettle, a high-temperature guide plate, a burner and the like.

Description

technical field [0001] The invention relates to an economical heat-resistant austenitic stainless steel in the field of stainless steel. The economical heat-resistant austenitic stainless steel is widely used in heating furnaces, heat exchangers, high-temperature reaction kettles, high-temperature guide plates and burners. Background technique [0002] Austenitic heat-resistant stainless steel is widely used in boilers and pressure vessels, such as steam boilers for thermal power generation, steam turbine industrial furnaces and jet engines. They all work at high temperatures and bear various loads. In addition, they are also in contact with high-temperature steam and high-temperature gas phase, and the surface is prone to high-temperature oxidation. 310 / 310S is a chromium-nickel type austenitic stainless steel. Due to the addition of a higher content of chromium and nickel than 304, it can effectively control the formation of oxides at high temperatures, making it have bett...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/48C22C38/54
Inventor 李杰申鹏
Owner ZHENSHI GROUP EASTERN SPECIAL STEEL
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