ThePipingMart Blog Grades AISI 94B30 Alloy Steel (G94301) – Composition, Properties and Uses

AISI 94B30 Alloy Steel (G94301) – Composition, Properties and Uses

AISI 94B30 Steel

If you’re involved in any kind of metalworking, then you know how important it is to have the right materials for the job. AISI 94B30 steel is an alloy steel that is commonly used for a variety of applications. AISI 94B30 alloy steel, also known as SAE- AISI 94B30 steel or UNS G94301, is popular due to its unique chemistry and exceptional properties. With carbon, manganese, silicon, and chromium composition, AISI 94B30 steel offers high tensile strength, great wear resistance, and excellent machinability. Moreover, this alloy steel exhibits outstanding toughness and impact strength, making it a preferred option for applications that require durability and longevity. Competent in forming, welding, and heat treatment, AISI 94B30 Steel is a fantastic option for automotive, construction, and engineering industries, where quality and reliability are paramount to success. The SAE 94B30 steel variant is highly corrosion-resistant and ideal for harsh and challenging environments. Overall, the composition and properties of AISI 94B30 steel make it a top choice for many in the know. In this blog post, we’ll take a look at what makes AISI 94B30 so special, as well as its uses, heat resistance, corrosion resistance, and machining properties.

What is AISI 94B30?

AISI 94B30 is an alloy steel composed of iron (Fe), carbon (C), silicon (Si), manganese (Mn), sulfur (S), and phosphorus (P). The composition can vary based on the specific grade and product form. This particular steel has good strength and wears resistance properties and is often used in automotive components such as connecting rods and gears.

What Forms of AISI 94B30 is Available at Piping Mart?

  • Nut
  • Bar
  • Bolt
  • Pipe
  • Screw
  • Tubing
  • Valves
  • Washers
  • Flanges
  • Fasteners
  • Electrodes
  • Stud Bolts
  • Sheet Plates
  • Pipe Fittings
  • Forged Fitting
  • Instrumentation Fittings

AISI 94B30 Composition

Element Weight %
C  0.28-0.33
Mn  0.75-1.00
P  0.035 (max)
S  0.04 (max)
Si  0.15-0.30
Cr  0.30-0.50
Ni  0.30-0.60
Mo  0.08-0.15
B  0.0005-0.003

AISI 94B30 Physical Properties

AISI 94B30 is a heat-treatable chromium-molybdenum alloy steel that was initially developed for the aerospace industry. It is known for its exceptional tensile strength and good fatigue resistance in high stress applications. The specific physical properties of AISI 94B 30 include its light weight, good machinability, and excellent weldability. It also has great corrosion resistance when exposed to different environments such as seawater or acidic fluids. With its versatility on both small and large scale projects, it can be used in a range of industries including power generation, construction, oil and gas production, mining, aircraft manufacturing and automotive. Considering all these factors, AISI 94B30 is an ideal steel alloy material for critical applications

AISI 94B30 Mechanical Properties

Properties  Conditions
T (°C) Treatment
Density (×1000 kg/m3) 7.7-8.03 25
Poisson’s Ratio 0.27-0.30 25
Elastic Modulus (GPa) 190-210 25
Tensile Strength (Mpa) 1724 25 oil quenched, fine grained, tempered at 205°C  more
Yield Strength (Mpa) 1551
Elongation (%) 12
Reduction in Area (%) 46
Hardness (HB) 475 25 oil quenched, fine grained, tempered at 205°C more

AISI 94B30 Uses

AISI 94B30 has a wide range of uses due to its versatility. It can be used for automotive parts like piston pins, connecting rods, gears, shafts, and more. It also has use in industrial applications such as fasteners, valves, springs, and other parts that are subject to high temperatures or wear. Additionally, it’s been used in nuclear power plant components and even aerospace applications due to its strength and durability.

AISI 94B30 Uses in Industries

Automotive Industry

AISI 94B30, also known as boron steel, is commonly used in the automotive industry for its high strength and durability. It often produces car frames, doors, and other structural components. Its ability to withstand high impact makes it a popular choice for ensuring passenger safety in vehicles.

Construction Industry

AISI 94B30 is often used for reinforcement in the construction industry due to its high tensile strength. It is commonly found in the form of rebar, which is used to reinforce concrete structures such as bridges, buildings, and highways.

Aerospace Industry

The aerospace industry also utilizes AISI 94B30 for its lightweight yet strong properties. It can be found in aircraft components, such as landing gear and engine mounts. Its corrosion resistance also makes it a suitable material for harsh environments.

Agriculture Industry

In the agriculture industry, AISI 94B30 is used for equipment such as ploughs and tillers due to its high wear resistance. It can withstand the tough conditions of farming and provide long-lasting performance.

Manufacturing Industry

Due to its versatility and strength, AISI 94B30 has various applications in the manufacturing industry. It can be found in machinery parts, tools, and equipment that require high strength and durability for heavy-duty operations.

AISI 94B30 Heat Resistance

AISI 94B30 has excellent heat resistance properties due to its high chromium content, which helps resist oxidation at elevated temperatures up to 890°C (1640°F). This makes it ideal for high-temperature applications where other materials may fail or degrade quickly under extreme conditions. Additionally, it doesn’t require additional treatments like tempering or hardening after welding, making it easier to work with than some other metals.

AISI 94B30 Corrosion Resistance

Due to its high chromium content again—this time combined with molybdenum—AISI 94B30 offers excellent corrosion resistance when compared with other steels. It’s able to withstand a wide range of environments, including saltwater which makes it suitable for marine applications or any other application that requires protection from corrosion damage over time.

AISI 94B30 Machining

When machined correctly using the right tools and techniques, AISI 94B30 offers good machinability without too much difficulty or extra wear on cutting tools. However, extra care should be taken when drilling into this material as it can become brittle if overheated during drilling operations resulting in poor surface finish or broken drill bits if not done properly. It’s also important to use sharp cutting tools when working with this material, as dull tools can cause chipping or cracking along the edges of cut pieces due to increased friction generated by less-than-optimal cutting surfaces on dull tooling blades/bits/cutters etc.


All things considered, AISI 94B30 is an excellent choice for many different applications where strength, wear resistance, heat resistance, and corrosion protection are all necessary requirements, especially those that operate within higher temperature ranges where regular steels may not perform optimally due to their lower melting points when compared with this alloyed version from American Iron & Steel Institute (AISI). Its versatile nature also means that it can be used in a variety of industries ranging from automotive to aerospace without sacrificing performance or quality, making it one of the top choices when looking for an all-purpose metal solution within these fields!

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