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Analysis of 304 stainless steel

Author: wenzhang1

May. 23, 2024


 

https://www.qing-zhan.com/coffee-kettle/long-spout-304-stainless-steel-pour-over-drip-milk-kettle.html

 

304 stainless steel is a common material in stainless steel with a density of 7.93 g/cm³; it is also called 18/8 stainless steel in the industry, which means it contains more than 18% chromium and more than 8% nickel; it is resistant to high temperatures of 800°C and has good processing performance , with the characteristics of high toughness, it is widely used in industrial and furniture decoration industries and food and medical industries. However, it should be noted that compared with ordinary 304 stainless steel, food-grade 304 stainless steel has stricter content indicators. For example: The international definition of 304 stainless steel is that it mainly contains 18%-20% chromium and 8%-10% nickel, but food-grade 304 stainless steel contains 18% chromium and 8% nickel, which is allowed to fluctuate within a certain range, and Limit the content of various heavy metals. In other words, 304 stainless steel is not necessarily food grade 304 stainless steel.

 

Tensile strength: σb (MPa)≥515-1035, conditional yield strength σ0.2 (MPa)≥205, elongation δ5 (%)≥40, reduction of area ψ (%)≥?. Hardness: ≤201HBW; ≤92HRB; ≤210HV Density (20℃, g/cm³): 7.93 Melting point (℃): 1398~1454 Specific heat capacity (0~100℃, KJ·kg-1K-1): 0.50

 

Thermal conductivity (W·m-1·K-1): (100℃) 16.3, (500℃) 21.5 Linear expansion coefficient (10-6·K-1): (0~100℃) 17.2, (0~ 500℃) 18.4 Resistivity (20℃, 10-6Ω·m2/m): 0.73 Elastic modulus (20℃, KN/mm2): 193

 

The main processing techniques of 304 stainless steel are stamping, drawing and tapping, and there are also a few forming techniques.


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