Incoloy® 825 | Just-In-Time Manufactured Alloy 825 Nickel Pipe

Alloy 825 Nickel Pipe

UNS N08825 / W.Nr 2.4858

COMMON TRADE NAMES: 2242, Alloy 2242, SM2242®, Incoloy® 825, Inc825, Sanicro® 41

Alloy 825 is a nickel-chromium-iron solid solution strengthened alloy with a nominal chemical composition of 42% nickel, 21% chromium, and 22% iron, plus additions of molybdenum, titanium, and copper. It is commonly referred to by the tradename Incoloy® 825 and the universal designation UNS N08825.

Characteristics

Corrosion Resistance

Alloy 825 has a PREN of 31 and a significant nickel content of 42%, which provides good corrosion resistance in many environments, including reducing and oxidizing acids, organic acids, seawater, salts, and alkalis. It is particularly resistant to sulfuric and phosphoric acids. The molybdenum addition gives Alloy 825 good resistance to chloride-induced localized corrosion, including pitting, crevice corrosion, and stress corrosion cracking. Additionally, alloy 825 has good oxidation resistance.

Service Temperature

Alloy 825 is used at temperatures from cryogenic up to 1000°F (540°C). The use of Alloy 825 at temperatures above 1000°F (538°C) is not recommended as harmful phases can form with a negative effect on impact toughness and ductility.

Mechanical Properties

Alloy 825 can be provided in the annealed condition or strengthened through the pilger process. Alloy 825 maintains useful mechanical properties up to about 1000°F (538°C) and good toughness down to cryogenic temperatures.

Applications

Alloy 825 is widely used in oil and gas applications. Other uses include chemical process equipment, exhaust systems, and power generation. CRA offers specialty alloy 825 seamless pipe & tube for use in multiple industries and applications, including:

Corrosive well conditions containing the presence of CO2 , H2S, and chlorides, in temperatures up to 300°F, without the presence of sulfur

Tubing, Casing, & Liners
Base Pipe for Sand Screens
Swell Packers
Exhaust Systems
Chemical Processing
Power Generation
Geothermal
Carbon Capture & Sequestration (CCS)

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Chemical Composition

C	Cr	Ni	Fe	Mn	Si	Mo	Cu	P	S	Ti	Al
≤ 0.05	19.5 - 23.5	38 - 46	BAL	≤ 1	≤ 0.5	2.5 - 3.5	1.5 - 3	≤ 0.03	≤ 0.03	0.6 - 1.2	≤ 0.2

(mass %)

Specified Mechanical Properties

API 5CRA / ISO 13680 Group 4 Category 21-42-3

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
110	110	140	115	11	33	Table A.14 Type 4c	No limit ≤ 270°F, Refer to table for temperatures up to 450°F
125	125	150	130	10	35	Table A.14 Type 4c
140	140	160	145	9	38	140 Grade not recommended for sour service

*Non-standard mechanical properties and grades are made available upon agreement.

Specified Mechanical Properties in Annealed Condition
Per ASTM B163 / ASTM B423

Tensile Strength	Yield Strength	Elongation	Hardness
minimum, ksi	minimum, ksi	minimum, %	HRB
85	35	30	90

*Higher strength properties can be provided in the cold hardened condition.

Typical Physical Properties

		70°F	200°F	400°F	600°F	800°F	1000°F	1200°F
Density	lbs/in³	0.294	-	-	-	-	-	-
Thermal Expansion	X10^-6/°F	-	7.8	8.3	8.5	8.7	9.5	9.6
Elastic Modulus	10³ ksi	28.3	27.9	27.1	26	25.2	23.52	22.37
Poisson Ratio	-	0.3	0.3	0.3	-	-	0.367	0.377
Thermal Conductivity	Btu-in/h·ft²·°F	-	85	97.5	109.6	119.7	139	152
Specific Heat	Btu/lb·°F	0.105	0.11	0.117	0.123	0.123	0.13	0.14
Yield Strength	ksi	35	30	26	25	23	12	11
Tensile Strength	ksi	85	77	75	73	71	52	44

Manufacturing Process

PROCESS	DESCRIPTION
Steel Making	Electric Arc Furnace followed by Vacuum Oxygen Decarburization (VOD) or Argon Oxygen Decarburization (AOD).
Pipe Making	Conventional Seamless Cold Finished Pipe and Tube Manufacturing Processes.
Heat Treatment	Cannot be hardened by heat treatment. May be provided in the annealed or cold hardened condition.

OCTG

Schedule Pipe

Manufacturing Capabilities

MIN OD: 2-1/16″ (2.0625″)
MAX OD: 10-3/4″ (10.750”)
MAX WALL THICKNESS: 1.925”
LENGTHS: Up to 70′ (840”)

YIELD: 35ksi – 160ksi
END FINISH: Plain end, Premium threads, & API threads

Standard & Non-Standard Sizes Available.

Manufactured Material Available as Quickly as 1 Week.

Non-Standard Mill Quantities Accommodated