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2. Austenitic stainless steel - Wikipedia

   en.wikipedia.org/wiki/Austenitic_stainless_steel

   In 200 series stainless steels the structure is obtained by adding manganese and nitrogen, with a small amount of nickel content, making 200 series a cost-effective nickel-chromium austenitic type stainless steel. 300 series stainless steels are the larger subgroup. The most common austenitic stainless steel and most common of all stainless ...

3. Brinell hardness test - Wikipedia

   en.wikipedia.org/wiki/Brinell_hardness_test

   The typical test uses a 10 mm (0.39 in) diameter steel ball as an indenter with a 3,000 kgf (29.42 kN; 6,614 lbf) force. For softer materials, a smaller force is used; for harder materials, a tungsten carbide ball is substituted for the steel ball. The indentation is measured and hardness calculated as:

4. SAE 304 stainless steel - Wikipedia

   en.wikipedia.org/wiki/SAE_304_stainless_steel

   A2 stainless steel outside the US, in accordance with ISO 3506 for fasteners. [4] 18/8 and 18/10 stainless steel (also written 18-8 and 18-10) in the commercial tableware and fastener industries. SUS304 the Japanese JIS G4303 equivalent grade. 1.4301, the EN 10088 equivalent. [5]

5. Orders of magnitude (length) - Wikipedia

   en.wikipedia.org/wiki/Orders_of_magnitude_(length)

   1 (10 0) 1 meter 1 m (exactly) Since 2019, defined as the length of the path travelled by light in a vacuum during a time interval of 1/299,792,458 of a second, where the second is defined by a hyperfine transition frequency of caesium. 2.72 m Height of Robert Wadlow, tallest-known human. [31] 8.38 m Length of a London bus (AEC Routemaster) 10 1

6. Stainless steel - Wikipedia

   en.wikipedia.org/wiki/Stainless_steel

   Stainless steel, also known as inox, corrosion-resistant steel (CRES), or rustless steel, is an iron-based alloy containing a minimum level of chromium that is resistant to rusting and corrosion. Stainless steel's resistance to corrosion results from the 10.5% or more chromium content, which forms a passive film that can protect the material ...

7. Duplex stainless steel - Wikipedia

   en.wikipedia.org/wiki/Duplex_Stainless_Steel

   For example, a Type 304 stainless steel has a 0.2% proof strength in the region of 280 MPa (41 ksi), a 22%Cr duplex stainless steel a minimum 0.2% proof strength of some 450 MPa (65 ksi) and a superduplex grade a minimum of 550 MPa (80 ksi).

8. Specific strength - Wikipedia

   en.wikipedia.org/wiki/Specific_strength

   The first nanotube ropes (20 mm long) whose tensile strength was published (in 2000) had a strength of 3.6 GPa, still well below their theoretical limit. [41] The density is different depending on the manufacturing method, and the lowest value is 0.037 or 0.55 (solid).

9. Vickers hardness test - Wikipedia

   en.wikipedia.org/wiki/Vickers_hardness_test

   It had been established that the ideal size of a Brinell impression was 3 ⁄ 8 of the ball diameter. As two tangents to the circle at the ends of a chord 3 d /8 long intersect at 136°, it was decided to use this as the included angle between plane faces of the indenter tip.