904L stainless steel material

904L stainless steel material

Stainless Steel 904L is an austenitic stainless steel known for its excellent corrosion resistance across a wide range of environments. Its unique combination of alloying elements provides strong protection against harsh conditions, while its austenitic structure ensures outstanding toughness and strength even at sub-zero temperatures. This makes it ideal for use in challenging industrial applications where durability and performance are crucial.

Table of contents

  • Stainless Steel 904L Chemical Composition
  • SS 904L Mechanical Properties
  • Physical properties of INOX AISI 904L
  • AISI 904L Welding Process
  • SUS 904L Mean Coefficient of Thermal Expansion
  • Corrosion Resistance of Alloy 904l
  • Corrosion Rates of 904L Material
  • Chemical Compatibility of Stainless Steel Alloy 904L
  • UNS N08904 Material Temperature Range
  • Type 904L Stainless Steel Thermal Properties
  • AISI 904L Equivalent grades
  • Specifications of SUS 904l Material
  • SAE 904l Electrical Properties
  • Din 1.4539 Applications
  • Advantages & Disavntages of SS 904l Material
  • Hot Forming of SUS 904l
  • Cold Forming of SS 904L
  • Machining of Stainless Steel Alloy 904L

904L stainless steel material Specification

Stainless Steel 904L Chemical Composition

Carbon (C)
0.02
Manganese (Mn)
2.00
Phosphorous (P)
0.03
Chromium (Cr)
19.00 – 21.00
Nickel (Ni)
24.00 – 26.00
Molybdenum (Mo)
4.00 – 5.00
Copper (Cu)
1.20 – 2.00

SS 904L Mechanical Properties

Grade Yield Strength 0.2% Proof (MPa) min Tensile Strength (MPa) min Elongation (% in 50mm) min Hardness
Brinell (HB) Rockwell B (HR B)
904L 220 490 36 150 70-90 typical

Physical properties of INOX AISI 904L

Density kg/dm³ 8
Modulus of elasticity GPa 195
Thermal Capacity J/kg°C 450
Electrical resistivity µΩm 1
Thermal conductivity W/m°C 15.8

Alloy 904L Offers Excellent Formability and Weldability

Being non-magnetic, this grade is highly formable and easy to weld, making it suitable for complex shapes and structures without compromising its integrity. It can be shaped into various forms with minimal risk of damage, ensuring high-quality end products in a variety of industries.

AISI 904L Welding Process

  • TIG
  • MIG
  • SMAW
  • PAW
  • SAW
welding process

SUS 904L Mean Coefficient of Thermal Expansion

Yield Strength 0.2% Offset psi (MPa) Ultimate Tensile Strength psi (MPa) Hardness Elongation in 2 in. %
31,000 220 71,000 490 70 – 90 Rockwell B 36

1.4539 Material is Known for Its Corrosion Properties

As a low-carbon, high-alloy austenitic stainless steel, 904L is primarily used for its exceptional corrosion resistance. The addition of copper enhances its ability to withstand aggressive environments such as sulfuric, phosphoric, and acetic acids. It also shows high resistance to pitting and crevice corrosion in chloride solutions, along with good resistance to stress corrosion cracking.

Corrosion Resistance of Alloy 904l

  • Good Resistance to Uniform Corrosion
  • Temperatures up to 95°F (35°C)
  • Concentration Range of 0 to 100%.
  • A Nickel content of 25%, 904L is a good Alternative
  • Susceptible to Chloride Stress Corrosion Cracking
  • 904L Have Good Resistance to SCC

Minimum Stress For Failure % of Rp0.2 at 200°C

minimum stress

Typical threshold stresses determined using the drop evaporation test.

Temperature, °C

temprature

Isocorrosion curves 0.1 mm/year, in pure sulphuric acid.

Corrosion Rates of 904L Material

Uniform corrosion Corrosion, (mm/year)
pickling acid at 25°C 0.47
wet process Phosphoric acid at 60°C 1.2
Distillation of Tall oil at 253°C 0.06

SUS 904L Has High Concentrations of Chromium, Nickel and Molybdenum

The high levels of chromium, nickel, and molybdenum contribute to its excellent corrosion resistance, particularly against chloride stress corrosion cracking, pitting, and general corrosion. These elements ensure that the material performs well in aggressive chemical environments.

Chemical Compatibility of Stainless Steel Alloy 904L

Chemical Compatibility
Sulfuric Acid (Hâ‚‚SOâ‚„) Good resistance ; avoid concentrated acid.
Hydrochloric Acid (HCl) Better resistance compared to many other stainless steels, especially at lower temperatures.
Nitric Acid (HNO₃) Good resistance, particularly up to 65% concentration at room temperature.
Phosphoric Acid (H₃PO₄) Good performance in moderate concentrations and temperatures.
Sodium Hydroxide (NaOH) Resistant, especially in lower concentrations
Sodium Chloride (NaCl) Resistant but prone to stress corrosion cracking in high chloride environments.
Acetone Generally compatible.
Ethanol Generally compatible.
Formic Acid Shows good resistance.
Oxidizing Agents Resistant to many oxidizing agents.
Hydrogen Sulfide (Hâ‚‚S) Susceptible to stress corrosion cracking, especially under high temperature.
SS 904L is Heat Resistant Alloy Designed for High Temperature Structural Applications

This grade is suitable for use in high-temperature environments due to its remarkable heat and corrosion resistance. It is widely used in the chemical and petrochemical industries, where materials must endure both corrosive conditions and elevated temperatures without losing structural integrity.

UNS N08904 Material Temperature Range

Temperature Range Performance
Cryogenic Temperatures (< -200°C / -328°F) Generally suitable
Ambient to Moderate Temperatures (up to ~400°C / 750°F) Excellent performance
High Temperatures (~400°C to 800°C / 750°F to 1470°F) Capable of withstanding moderate temperatures
Exceeding 800°C / 1470°F The material is generally not recommended for such high temperatures.

Type 904L Stainless Steel Thermal Properties

Thermal Properties Metric English
CTE, linear 15.3 µm/m-°C
Temperature 20.0 – 100 °C		 8.50 µin/in-°F
Temperature 68.0 – 212 °F
16.5 µm/m-°C
Temperature 20.0 – 400 °C		 9.17 µin/in-°F
Temperature 68.0 – 752 °F
18.2 µm/m-°C
Temperature 20.0 – 800 °C		 10.1 µin/in-°F
Temperature 68.0 – 1470 °F
Specific Heat Capacity 0.460 J/g-°C 0.110 BTU/lb-°F
Thermal Conductivity 11.5 W/m-K
Temperature 20.0 °C		 79.8 BTU-in/hr-ft²-°F
Temperature 68.0 °F
12.9 W/m-K
Temperature 100 °C		 89.5 BTU-in/hr-ft²-°F
Temperature 212 °F
Refer 904L Material Equivalent, Composition and Specification

Equivalent grades allow users to identify the same material in different countries, which is essential for international trade. Knowing the equivalent grade ensures that the material meets the required specifications and properties for the intended application.

Understanding the chemical composition is vital in manufacturing stainless steel, as it determines the material’s mechanical properties, including strength, toughness, and ductility. This helps the product withstand corrosive or harmful conditions effectively.

Specifications provide standardized information on the material's properties, helping users determine where and how it can be applied. This ensures that the material is used appropriately in different industrial settings.

AISI 904L Equivalent Grades

Grade UNS No Old British Swedish SS Euronorm
En BS No Name
904L N08904 – 904S13 2562 1.4539 X1NiCrMoCuN25-20-5

Specifications of SUS 904L Material

  • Trade Names :SS 904L, AISI 904L, INOX 904L, SUS 904L, Stainless Steel 904L, 904L Steel, ASTM 904L
  • Benefits :Non-magnetic, Excellent corrosion properties, Good resistance to sulphuric, Excellent formability and weldability
  • Temperature Range :850 °C – 1150 °C
  • Features :Lower carbon content leads to resistance to sensitization when welded, Increased resistance to chemical attack from acids

SAE 904L Electrical Properties

Electrical Properties Metric English
Electrical Resistivity 0.0000952 ohm-cm 0.0000952 ohm-cm
Magnetic Permeability <= 1.02 <= 1.02

DIN 1.4539 Applications

  • Organic Acid Treatment System
  • Sea Water Heat Exchanger
  • Paper Industry Equipment
  • Heat Exchangers
  • Condenser Tubes
  • Gas Scrubbing Plants
  • Pulp and Paper Processing Industries

Advantages & Disadvantages of SS 904L Material

Advantages

  • Excellent Corrosion Resistance
  • Good Strength and Toughness
  • Good Formability & Durability
  • It is Non-magnetic in the Annealed Condition

Disadvantages

  • Expensive Material
  • Not Ideal for Very High Temperatures
  • Extremely High-temperature Applications
  • Potential for Work Hardening

Hot Forming of SUS 904L

  • Working temperatures:1562 – 2102°F (850 –1150°C)
  • Forming Techniques:Forging, rolling, or extrusion
  • Solution Annealed:1940 – 2084°F (1060 –1140°C).
  • Partial Heating or Cooling :below 2012°F (1100°C)

Cold Forming of SS 904L

  • Work Hardening: work-hardens significantly, cold working might require intermediate annealing.
  • Nitrogen Implies more powerful processing equipment
  • Ductile and Forms Easily

Machining of Stainless Steel Alloy 904L

  • Makes it less Machinable
  • More Challenging due to work hardening
  • Using proper tooling and cutting fluids.

Regular Trigger Sprayer

we are regular Trigger Sprayer,trigger spray head manufacturer ,with high quality control.

Normally used for window cleaning,car wash bottle sprayer,hair care sprayer,house cleaning, laundry care, & pet training.etc.

with adjustable spray/stream nozzle,foam nozzle,

There are 28/400 28/410 28/415 ratchet standard size ,with screw closure to fit with bottles.



Regular Trigger Sprayer,Trigger Spray Head,Spray Nozzle Trigger,Water Spray Nozzle Trigger For Bottle

NINGBO CRETE PLASTIC CO.,LTD , https://www.crete-sprayer.com