420 Mod - UNS S42000

 

420 Mod is a Martensitic Stainless Steel with 13% Chromium and a restricted carbon range. 420 Mod is allowed by NACE MR0175 for limited sour service with a maximum of 1.5 psi maximum H2S partial pressure. It has excellent corrosion resistance in sweet environments.

 

420 Mod Specification/Condition

  • NACE MR0175 / ASTM A484

Applications

  • structural and pressure containing tools
  • packers
  • drill collars
  • mandrels

420 Mod technical data

  • UTS (KSI): 95 Min
  • Yield 0.2% Offset (KSI): 80 Min
  • EL (% Min): 20
  • RA (% Min): 40
  • Maximum Hardness (HRC): 22
  • Charpy Impact Min. ft-lbs: –

Dimensions

  • 2.5 – 10.0 in

420 Mod Chemical composition (Wt %)

 

Carbon
(C)
Manganes
(Mn)
Phosphorus
(P)
Sulfur
(S)
Silicon
(Si)
Nickel
(Ni)
Cobalt
(Co)
0.18-0.22 Max 1.00 Max 0.02 Max 0.010 Max 1.0 Max 0.50 Max

 

Chromium
(Cr)
Molybdenum
(Mo)
Niobium + Tantalum
(Nb (Cb) + Ta)
Titanium
(Ti)
Copper
(Cu)
Aluminum
(Al)
Iron (Fe) & Others
12.0-14.0 0.25 Max Fe– Balance

 

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