Grade Super 13 Cr & 13-5-2 Tube

UNS S41426 : UNS S41427

General scope

Both grades developed from the standard 13Cr and 420 Modified grades offer enhanced mechanical properties and corrosion resistance. The low carbon improves weldability whilst maintaining the martensitic microstructure.

Available in bar or tube form, its main application is within the OCTG tubing & casing and downhole completion equipment.

The Sumitomo grade is NACE MR0175 approved subject to a hardness limitation of 27 HRC and a yield strength of 105 KSI.

When bill of material requirements can be matched against the wide stock of sizes available, considerable cost savings in both raw material supply and manufacturing are achievable against the comparable bar product.

Chemical composition

Sumitomo Super 13Cr (UNS S41426)

C Si Mn P S Cr Ni Mo Ti V Fe
Min 11.50 4.50 1.50 0.01 0.10 0.00
Max 0.03 0.50 0.50 0.020 0.005 13.50 6.50 3.00 0.50 0.50 0.00

13-5-2 (UNS S41427)

C Si Mn P S Cr Ni Mo Ti V Fe
Min 11.50 4.50 1.50 0.10 0.00
Max 0.03 0.50 1.00 0.020 0.005 13.50 6.00 2.50 0.01 0.50 0.00

Mechanical properties

Condition: Hardened and Tempered. Usually supplied with the 95 or 110 KSI 0.2% P.S.

U.T.S 115 KSI Min (792 N/mm2)
0.2% Proof Stress 110 KSI Min (758 N/mm2)
Elongation 15 %
CVN Impacts @ -10°C (14°F) 78 Joules (60 ft-lbf)
Hardness 33 %
Size range: 2.375”∅ - 7.25”∅

Primarily manufactured in:

  • Dubai, UAE
  • Edmonton, Canada
  • Houston, Texas
  • Sheffield, England
  • Singapore