1821
Stodart–Faraday
Early Cr-iron notes that did not yet make a market.
Milestones in order. This is history, not a weekly activity grid.
- Stodart–Faraday
- Woods patent
- Brearley 13% Cr
- Strauss–Maurer 18/8
- Staybrite
- Aircraft exhaust
- 316 Mo
- Duplex 2205
- Super duplex / 6Mo
- Lean duplex
Darker cells mean a higher score for this topic on that metric.
Strength74
Heat resistance76
Fire performance86
Insulation10
Workability70
Circularity68
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Quick answers
Is Stainless steel non-combustible?
Declared reaction class in this atlas: A1 metal. Assemblies still need resistance tests.
Does Stainless steel insulate?
Thermal mark 10/100 versus the atlas. Conductivity note: ~15 W/m·K (austenitic).
What is the density band?
~8.0 g/cm³
How is it made?
Origin story: 1913 Brearley / Strauss (Sheffield / Essen).
Can it be recycled?
Circularity mark 68/100 — editorial, route-specific.
Typical melting or failure heat?
~1400–1450 °C
heat 76 · fire 86
Stainless steel did not arrive as a finished commodity. 1913 Brearley / Strauss around Sheffield / Essen still explains who makes it and which tests it sits in.
Ten dated points, five eras and three milestones below are the spine — not a complete industrial history.
Where it began
1913 Brearley / StraussSheffield / Essen
Timeline
1821Stodart–Faraday
Early Cr-iron notes that did not yet make a market.
1872Woods patent
Chromium steels without the kitchen-brand fame.
1913Brearley 13% Cr
Sheffield gun barrels that did not rust — martensitic cutlery steel.
1912–14Strauss–Maurer 18/8
Krupp austenitics became the chemical-plant family.
1924Staybrite
UK marketing put stainless on tableware.
1930sAircraft exhaust
Heat-resisting grades entered aero.
1960s316 Mo
Molybdenum for chlorides in marine and pharma.
1980sDuplex 2205
Ferrite+austenite for offshore pipes.
1990sSuper duplex / 6Mo
Seawater systems and desalination.
2010sLean duplex
Ni-saving grades for construction tanks.
The eras
1913
Brearley 13% Cr
Sheffield gun barrels that did not rust — martensitic cutlery steel.
1924
Staybrite
UK marketing put stainless on tableware.
1960s
316 Mo
Molybdenum for chlorides in marine and pharma.
1990s
Super duplex / 6Mo
Seawater systems and desalination.
Milestones
Strauss–Maurer 18/8
1912–14Krupp austenitics became the chemical-plant family.
316 Mo
1960sMolybdenum for chlorides in marine and pharma.
Lean duplex
2010sNi-saving grades for construction tanks.
Knowing this timeline is how to read a mill certificate without treating Stainless steel as timeless.
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