Which steel has this composition?

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    Composition Steel
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Discussion Overview

The discussion centers around identifying a specific type of steel based on its detailed chemical composition provided by a participant. The inquiry involves aspects of material science, specifically focusing on the classification of steel types based on carbon content and alloying elements.

Discussion Character

  • Debate/contested
  • Technical explanation

Main Points Raised

  • One participant presents a detailed chemical composition of steel obtained from an optical emission spectrometer.
  • Another participant suggests that the steel could be classified as carbon steel, questioning its specific type.
  • A later reply proposes that the composition indicates a mild carbon steel, referencing a specific steel grade (C45 or 1.0503) and suggesting that the impurities are typical of lower-grade steel.
  • Another participant counters that the steel is medium carbon steel based on the carbon and manganese content, providing a range for medium carbon steel and discussing its properties.

Areas of Agreement / Disagreement

Participants express differing opinions on whether the steel is classified as mild carbon steel or medium carbon steel, indicating a lack of consensus on the classification based on the provided composition.

Contextual Notes

Participants reference specific steel grades and properties, but there is no resolution on the classification due to differing interpretations of the carbon and manganese content.

encik_lai
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Chemical Composition (%)
C 0.472
Si 0.216
Mn 0.67
P 0.0014
S <0.0011
Cr 0.077
Ni 0.015
Mo <0.0020
Al 0.026
Cu 0.021
Co 0.0034
Ti <0.0010
Nb 0.011
V 0.0030
W 0.016
Pb 0.014
Mg 0.0011
B <0.0005
Sn 0.0024
Zn 0.0038
As 0.0093
Bi >0.025
Ca 0.0025
Ce 0.0068
Zr 0.0044
La <0.0010
Fe 98.4

i got this result from optical emission spectrometer
 
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Steel.
 
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Vanadium 50 said:
Steel.

carbon steel?
 
Changing the title makes me look foolish. The original title was "what material is this". After that, you expect me to help you? Forget it!
 
Hello encik_lai,

The only element of interest there is C with it's 0.47% suggesting a mild carbon steel unalloyed. Like http://www.matbase.com/material-cat...erial-properties-of-high-grade-steel-c45.html
So close to a C45 or 1.0503.
The other impurities are the usual result of melting down 2 oil-tankers 500 cars and nuclear reactor parts and low purification thereafter as this steel is not with very expensive properties.
 
Ah forgot to mention, all said above is true for mass %.
 
Fe 98.4, Mn 0.67, C 0.472, Si 0.216, is a medium carbon steel, not a mild steel.The Mn gives it some wear resistance.
wikipedia said:
Medium carbon steel: approximately 0.29% to 0.54% carbon content with 0.60 to 1.65% manganese content (e.g. AISI 1040 steel). Balances ductility and strength and has good wear resistance;
http://simple.wikipedia.org/wiki/Carbon_steel