What material is Incoloy 825 bar – what is its density

2026-03-17

Incoloy 825 is a nickel-iron-chromium alloy with additions of molybdenum, copper, and titanium. It is engineered to provide exceptional resistance to a wide range of corrosive environments, including reducing and oxidizing acids, stress-corrosion cracking, and localized attacks like pitting and crevice corrosion. When supplied in bar form, this alloy is commonly used to manufacture valve stems, pump shafts, fasteners, and fittings for chemical processing, pollution control, oil and gas recovery, and nuclear fuel reprocessing. Understanding the physical properties, such as density, as well as the available specifications and dimensional data for Incoloy 825 bar is crucial for engineers and procurement specialists. This article provides a detailed breakdown of what Incoloy 825 bar is, its density, available sizes, mechanical requirements, and general price references.

Table of Contents Hide

1 Chemical Composition of Incoloy 825 Bar

2 Physical Properties and Density of Incoloy 825 Bar

3 Available Specifications and Size Ranges

4 Mechanical Requirements at Room Temperature

5 Reference Price for Incoloy 825 Bar

6 Incoloy 825

Incoloy 825

Chemical Composition of Incoloy 825 Bar

The performance of Incoloy 825 is directly tied to its specific chemical makeup. The alloy is stabilized with titanium to prevent sensitization and intergranular corrosion after welding. The following table outlines the typical elemental composition requirements for the bar form.

Element	Composition (%)
Nickel (Ni)	38.0 – 46.0
Iron (Fe)	22.0 min (Balance)
Chromium (Cr)	19.5 – 23.5
Molybdenum (Mo)	2.5 – 3.5
Copper (Cu)	1.5 – 3.0
Titanium (Ti)	0.6 – 1.2
Manganese (Mn)	≤ 1.0
Silicon (Si)	≤ 0.5
Carbon (C)	≤ 0.05
Sulfur (S)	≤ 0.03
Aluminum (Al)	≤ 0.2

Physical Properties and Density of Incoloy 825 Bar

When working with Incoloy 825 bar for engineering calculations, weight estimation is a critical first step. The density of Incoloy 825 is a constant physical property that does not vary with the size or shape of the bar. The standard density value for this alloy is 8.14 g/cm³ (0.294 lb/in³). This value is essential for determining the weight per foot or meter of the bar, which directly impacts shipping costs and structural support requirements. Below is a table showing the calculated weight for common round bar diameters based on this density.

Diameter (inches)	Diameter (mm)	Weight per Foot (lbs)	Weight per Meter (kg)
0.5	12.7	0.67	1.00
1.0	25.4	2.68	3.99
2.0	50.8	10.72	15.96
4.0	101.6	42.88	63.84
6.0	152.4	96.48	143.64

Available Specifications and Size Ranges

Incoloy 825 bar is manufactured to various international standards to ensure consistency and quality. The most common specification for bar products is ASTM B425 (ASME SB425). Bars are available in a variety of shapes including round, square, hexagon, and flat. The sizes can range from small diameters used in precision machining to large diameters for heavy shafting. Shanghai NC Metal Materials Co., Ltd. supplies these bars in a wide range of dimensions to meet diverse industrial requirements. The following table outlines the common size ranges available.

Bar Shape	Size Range (mm)	Size Range (inches)	Typical Length (m)
Round Bar	6.0 – 300	0.25 – 12	3 – 6
Hexagon Bar	8.0 – 80 (AF)	0.375 – 3 (AF)	3 – 6
Square Bar	10 – 150	0.5 – 6	3 – 6
Flat Bar	Thickness: 3 – 50 Width: 20 – 200	Thickness: 0.125 – 2 Width: 0.75 – 8	3 – 6

Mechanical Requirements at Room Temperature

The mechanical properties of Incoloy 825 bar ensure it can withstand high stress and pressure in service. These properties are typically verified through tensile and hardness tests. The values can vary slightly depending on the size of the bar and the heat treatment condition (typically annealed). Shanghai NC Metal Materials Co., Ltd. ensures that all supplied bars meet or exceed the requirements of ASTM B425.

Property	Metric Value	Imperial Value
Tensile Strength (Min)	585 MPa	85 ksi
Yield Strength (0.2% Offset) (Min)	240 MPa	35 ksi
Elongation (in 2 inches) (Min)	30%	30%
Hardness (Brinell) (Max)	217 HB	217 HB
Modulus of Elasticity	196 GPa	28,400 ksi

Reference Price for Incoloy 825 Bar

Pricing for Incoloy 825 bar is dynamic and fluctuates based on raw material costs (nickel and molybdenum prices), market demand, and manufacturing complexity. The following table provides estimated reference prices only. Actual quotations from suppliers like Shanghai NC Metal Materials Co., Ltd. should be requested for specific sizes and quantities.

Bar Diameter (mm)	Price Range (USD/kg)	Price Range (USD/lb)	Typical Order Quantity
6 – 20	$25 – $35	$11.50 – $16.00	500 kg – 2000 kg
25 – 75	$22 – $30	$10.00 – $13.60	1000 kg – 5000 kg
80 – 150	$20 – $28	$9.00 – $12.70	1000 kg – 3000 kg
> 150	$28 – $40	$12.70 – $18.00	Upon Request

Note: Prices are indicative and subject to market volatility. For the most accurate and current pricing, it is recommended to contact Shanghai NC Metal Materials Co., Ltd. directly.

Incoloy 825

What is the density of Incoloy 825 in g/cm³?
The density of Incoloy 825 is 8.14 g/cm³. This value is consistently used to calculate the weight of bars, sheets, and other forms of this alloy for engineering and logistical purposes.

What is the difference between Incoloy 825 and 316 stainless steel?
Incoloy 825 contains significantly higher nickel (38-46%) and molybdenum (2.5-3.5%) compared to 316 stainless steel. This gives Incoloy 825 superior resistance to reducing acids like sulfuric and phosphoric acid, as well as better resistance to stress-corrosion cracking and pitting in harsh chloride environments.

Can Incoloy 825 bar be welded?
Yes, Incoloy 825 bar exhibits excellent weldability. It is typically welded using matching filler metals such as ERNiFeCr-1 (for TIG/GTAW) or ENiCrMo-3 (for coated electrodes). Due to its titanium stabilization, it resists sensitization and intergranular corrosion in the weld heat-affected zone, often allowing it to be used in the as-welded condition.