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 Max1.00 Max0.02 Max0.010 Max1.0 Max0.50 Max
Chromium(Cr)Molybdenum(Mo)Niobium + Tantalum(Nb (Cb) + Ta)Titanium(Ti)Copper(Cu)Aluminum(Al)Iron (Fe) & Others
12.0-14.00.25 MaxFe– Balance
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