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The difference between 201, 304, 316 stainless steel bridge material

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The difference between 201, 304, 316 stainless steel bridge material

作者: 南京瑞全电气制造有限公司点击: Release Date: 2018-10-11 Author: Nanjing full-Rui Electric Manufacturing Co., Ltd. Views:

Stainless steel bridge material classification:


201 stainless steel bridge


201 stainless steel has certain acid and alkali resistance, high density, polished without bubbles, and no pinholes. It is a high-quality material for the production of various watch cases and strap bottom covers. It is mainly used to make decorative pipes, industrial pipes, and some shallow drawn products.


Chemical Composition Editing (C) Carbon: ≤0.15


(Si) Silicon: ≤0.75


(Mn) Manganese: 5.5 ~ 7.50


(Cr) Chromium: 13.50 ~ 15.0


(N) Nitrogen: ≤0.25


(P) Phosphorus: ≤0.060


(S) Sulfur: ≤0.030


(Ni) Nickel: 3.50-5.50%


(Cu) copper: half copper 0.8%


High copper 1.5%


See GB / T 20878-2007


304 stainless steel bridge


304 stainless steel is a very common stainless steel, also called 18/8 stainless steel in the industry. Its corrosion resistance is better than 430 stainless iron, corrosion resistance and high temperature resistance, good processing performance, so it is widely used in industry and furniture decoration industry and food and medical industry, such as: some high-end stainless steel tableware, bathroom kitchen appliances. Although this type of stainless steel is very common in China, the name "304 stainless steel" comes from the United States. Many people think that 304 stainless steel is a model of Japan, but in a strict sense, the official name of 304 stainless steel in Japan is "SUS304". There are three common labeling methods on the market: 06Cr19Ni10, 304, and SUS304. Among them, 06Cr19Ni10 generally indicates national standard production, 304 generally indicates ASME standard production, and SUS 304 indicates daily standard production. 304 is a versatile stainless steel that is widely used to make equipment and parts that require good overall performance (corrosion resistance and formability). In order to maintain the inherent corrosion resistance of stainless steel, steel must contain more than 16% chromium and more than 8% nickel. 304 stainless steel is a grade of stainless steel produced in accordance with American ASTM standards.

304不锈钢桥架

不锈钢桥架

Physical properties edited tensile strength σb (MPa) ≥520


Conditional yield strength of 304 stainless steel σ0.2 (MPa) ≥205


Elongation δ5 (%)


Section shrinkage rate ψ (%) ≥60


Hardness: ≤187HB; ≤90HRB; ≤200HV


Density (20 ° C, Kg / dm2): 7.93


Melting point (° C): 1398 ~ 1454


Specific heat capacity (0 ~ 100 ℃, KJ · kg-1K-1): 0.50


Thermal conductivity (W · m-1 · K-1): (100 ° C) 16.3, (500 ° C) 21.5


Coefficient of linear expansion (10-6 · K-1): (0 ~ 100 ° C) 17.2, (0 ~ 500 ° C) 18.4


Resistivity (20 ° C, 10-6Ω · m): 0.73


Longitudinal elastic modulus (20 ° C, KN / mm2): 193 [1]


316 stainless steel bridge


Chemical composition


Grade C Si Mn PS Ni Cr Mo N other


316 ≤0.08 ≤1 ≤2 ≤0.035 ≤0.030 10.0 ~ 14.0 16.0 ~ 18.5 2.00-3.00 —


3 mechanical properties edit grade heat treatment yield strength σ0.2 / Mpa tensile strength σb / Mpa elongation δ5 /% HBS HRB HV


316 1010 ~ 1120 Quick cooling ≥205 ≥520 ≥40 ≤187 ≤90 ≤200


Performance Editing


The corrosion resistance is better than 304 stainless steel, and it has good corrosion resistance in the production process of pulp and paper. And 316 stainless steel is also resistant to marine and aggressive industrial atmospheres.



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