Grade 420 Mod & API 5CT 13Cr Tube

General scope

This is a martensitic stainless steel used in the hardened and tempered condition. Available in tubular form either as mechanical tube or casing tube The manufacturing standards of ASTM A519 (VO1.01) are used for mechanical tube supply.

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

It is used extensively on completion equipment in both bar form, and for structural and pressure containing members, in standard and CO2 environments. PH, chlorides, temperature and H2S can limit its use in other environments.

The grade is approved by NACE MR0175 supplied to 22 HRC for packers and other sub-surface equipment.

Chemical composition

420 Mod

C Si Mn P S Cr Ni Mo Cu Fe
Min 0.18 0.25 0.25 12.50 0.00
Max 0.22 1.00 1.00 0.020 0.005 14.00 0.50 0.25 0.00

API 5CT 13Cr

C Si Mn P S Cr Ni Mo Cu Fe
Min 0.15 0.25 12.00 0.00
Max 0.22 1.00 1.00 0.020 0.010 14.00 0.50 0.25 0.00

Mechanical properties

Condition: Hardened and Tempered

NACE MR0175 limits supply hardness to 22 HRC max.
U.T.S 100 KSI Min (689 N/mm2)
0.2% Proof Stress 80 KSI Min (551 N/mm2)
Elongation 20 %
Red of Area 40 %
CVN Impacts @ -10°C (14°F) 20 Joules (15 ft-lbf)
Size range: 1/”∅ OD up to 2”∅ OD with wall thickness from 22 swg to ”∅

Primarily manufactured in:

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