13 Chrome

UNS S42000 / W.Nr 1.4021

COMMON TRADE NAMES: 13 Chrome, API L80 13CR, API 5CT 13Cr, 13Cr L80, L80-13Cr, 420, 420 Mod, 13%Cr

13 Chrome Applicable Environments 13 Chrome L80, UNS S42000, is a quenched and tempered martensitic stainless steel used for corrosion resistance in sweet (CO₂) and mildly sour (H₂S) environments up to 300°F. Commonly used as downhole tubular components, packers, and other subsurface equipment, it is included in API 5CT as Group 2, Grade L80, Type 13Cr. Its controlled yield strength and hardness comply with NACE MR0175.

This grade is best suited for mildly corrosive conditions as pH, chlorides, temperature, and H₂S may limit its use. NACE MR0175/ISO15156 Table A.19 provides a recommended limit of 1.5 psi partial pressure H₂S with pH ≥3.5.

Applications in Upstream Oil & Gas

Mildly corrosive environments containing CO2 , and H2S ≤ 1.5 psi

Tubing
Casing
Liners
Base Pipe for Sand Screens
Expandables
Perforating Guns
Landing Joints
Extensions
Shrouds
Maker Joints
Pipe for VIT
Swell Packers
Geothermal
Carbon Capture and Sequestration (CCS)

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Chemical Composition

C	Cr	Ni	Fe	Mn	Si	Cu	P	S
0.15 - 0.22	12 - 14	≤ 0.5	BAL	0.25 - 1	≤ 1	≤ 0.25	≤ 0.02	≤ 0.01

(mass%)

Manufacturing Process

PROCESS	DESCRIPTION
Steel Making	Made by electric furnace (EF) or basic oxygen furnace (BOF)
Pipe Making	Manufactured by traditional hot tube manufacturing processes
Heat Treatment	Quenched and tempered

Specified Mechanical Properties

API 5CT Group 2 Grade L80 Type 13Cr

Grade	Yield Strength ksi		Tensile Strength ksi	Elongation %	Hardness HRC	NACE MR0175/ISO 15156 H₂S Sour Service Limits
Grade	min	max	min	min	max	NACE MR0175/ISO 15156 H₂S Sour Service Limits
80	80	95	95	Function of specimen size	23	Table A.19	H2S ≤ 1.5 psi, pH ≥ 3.5