4140 ht verses 4142 ht
4140 ht verses 4142 ht
(OP)
I have a print for a housing that calls for 4142 H.T. Having trouble finding this material, but being offered 4140 H.T. What is the difference?
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RE: 4140 ht verses 4142 ht
RE: 4140 ht verses 4142 ht
Carbon 0.38 – 0.43 for 4140 versus 0.40 – 0.45 for 4142
Manganese 0.75 – 1.00
Phosphorous 0.035 Max
Sulfur 0.040 Max
Silicon 0.15 – 0.30
Chromium 0.80 – 1.10
Molybdenum 0.15 – 0.25
Maui
RE: 4140 ht verses 4142 ht
This suggests 4142 HT may be a somewhat standard product for making shafts and whatnot.
http://www.speedymetals.com/information/Material63...
4142 HT Turned, Ground and Polished is a chromium-molybdenun alloy steel that has been hardened to 27 to 32 Rockwell C and is ready to use while still machinable and of exceedingly high strength.
MECHANICAL PROPERTIES
Tensile Strength (PSI) 140,000
Yield Strength (PSI) 90,000
Reduction of Area 45
Elongation in 2" 20
Brinell Hardness 300
The above values are average and may be considered as representative of 4140 HT TGP
Note the specs have a comment referencing 4140, not 4142. No clue where the typo is.
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https://www.lindquiststeels.com/documentation/4140...
•4140 HT – prehardened condition which is heat treated to a medium hardness (HRC 28/32). 4140 HT is supplied in many forms such as; hot rolled or turned, ground and polished rounds and DCF plate which is used as a holder material for high strength structural components.
RE: 4140 ht verses 4142 ht
See if your suppliers can find some dual certified material.
RE: 4140 ht verses 4142 ht