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Your Professional precision alloy Bar & Rod Supplier

 

Lork Group specializes in supplying precision alloy rods and bars. Common materials include Kovar, Invar, Ni-Span C, Elgiloy, P6, and HiperCo etc. Our stock complies with ASTM, AISI, AMS, JIS, GB, and other relevant standards. These rods are commonly used in aerospace, medical, and industrial applications. We stock rod sizes ranging from Ø4 mm to Ø600 mm and offer custom processing from billets into square rods, round bars, and related castings. Best of all, we support SGS third-party testing!

 
  • HyMu 50 Permalloy 50 Bar (W.Nr. 1.3922 / FeNi50)
    HyMu 50 Permalloy 50 Bar (W.Nr. 1.3922 / FeNi50)

    HyMu 50 acts as the Master of Balance among soft magnetic alloys—while it does not aim for extreme sensitivity, it offers the most stable overall performance.

  • HyMu 80 Permalloy Bar
    HyMu 80 Permalloy Bar

    Permalloy possesses two core characteristics: first, an exceptionally high initial permeability, enabling it to function effectively even under weak magnetic fields; and second, an extremely low

  • ASTM B753 Ni-Span-C 902 Precision Alloy
    ASTM B753 Ni-Span-C 902 Precision Alloy

    Ni-Span-C 902 is a precipitation-hardening nickel-iron-chromium thermoplastic alloy known for its extremely low coefficient of thermal expansion and nearly constant elastic modulus (Elinvar effect)

  • AISI 4330 V Alloy Bar
    AISI 4330 V Alloy Bar

    AISI 4330 V alloy bar is a double melted, extremely clean steel that demonstrates greater usable strength, superior transverse properties, higher fatigue strength, improved notch toughness and

  • AISI 4145H Alloy Bar
    AISI 4145H Alloy Bar

    AISI 4145H alloy bar is a chromium – molybdenum low alloy tempered steel. It has improved hardenability and is more is commonly used in the high strength condition with minimum yield 125 ksi / 110

  • AISI 4140 Alloy Bar
    AISI 4140 Alloy Bar

    AISI 4140 alloy bar is a chromium-, molybdenum-, and manganese-containing low alloy steel. It has high fatigue strength, abrasion and impact resistance, toughness, and torsional strength.

  • AISI 4130 Alloy Bar
    AISI 4130 Alloy Bar

    AISI 4130 alloy bar is a low alloy C-steel containing chromium and molybdenum as strengthening agents. It has low carbon content, and hence it can be welded easily.

  • ASTM F30 Invar 42 Bar
    ASTM F30 Invar 42 Bar

    Note on Magnetism: Invar 42 is magnetic below 360°C. This factor should be taken into consideration when used in equipment sensitive to strong magnetic fields.

  • ASTM F1684 Invar 36 Bar
    ASTM F1684 Invar 36 Bar

    Invar 36 alloy is a precision alloy and a very unique iron-nickel alloy, known for its extremely low coefficient of thermal expansion.

 

Custom precision alloy Bar & Rod

We offer custom precision alloy bar solutions to meet your project needs. Key customizable options include:

 
 

Material Type:

Soft magnetic alloys, expansion alloys, elastic alloys, etc.

 
 
 

Size:

Diameter: Ф4mm - Ф600mm， Customizable upon request.

 
 
 

Availability:

Solid solution state, aging state, precipitation hardening state, return state, etc.

 

 

 

Advantages of Precision Alloy Bar

ASTM F30 Invar 42 Bar

Higher strength & toughness:

ASTM F30 Invar 42 bar can withstand higher stress loads and impact resistance than carbon steel.

 

ASTM F1684 Invar 36 Bar

Improved heat resistance:

ASTM F1684 Invar 36 bar can withstand high temperatures without weakening, making it suitable for use in aerospace and power generation applications.

AISI 4330 V Alloy Bar

Better wear resistance:

Precision Alloy(Kovar, Elgiloy, Sumispan-4, A286, Ceramvar). More durable in high-friction environments, making it ideal for bearings, tools, and machinery.

AISI 4140 Alloy Bar

Corrosion resistance:

Precision Alloy (1J22, 1J50， Vicalloy, Ni-Span C）bars, especially those with chromium, offer improved rust and oxidation resistance.

Types of Precision Alloy Bar & Rod

Soft magnetic alloy bar:

Soft magnetic alloys are the most common precision alloys. Its advantages are easy magnetization, demagnetization, and good magnetic conductivity. Common grades are 1J50, 1J79, 1J85, 1J22, etc. This type of alloy is generally used in transformer cores, magnetic shielding, and sensors.

Elastic alloy bar:

Elastic alloys are relatively special precision alloys with the advantage of excellent elastic properties. Common grades include 3J1, 3J53 (constant elasticity), etc. This type of alloy is generally used in instrument springs, mechanical filters, and watch hairsprings.

Expansion alloy bar:

Expansion alloys are the most widely used precision alloys. Their advantage is controlled thermal expansion behavior. Common grades include 4J36 (low expansion) and 4J29 (constant expansion). These alloys are generally used in precision instruments and electronic packaging.

 

Precision Alloy Bar & Rod Mechanical Properties

 

Properties

Metric

Imperial

Bulk modulus (typical for steels)

140 GPa

20300 ksi

Shear modulus (typical for steels)

80.0 GPa

11600 ksi

Elastic modulus

190-210 GPA

27557-30458 ksi

Poisson's ratio

0.27-0.30

0.27-0.30

Hardness, Brinell

208

208

Hardness, Knoop (converted from Brinell hardness)

230

230

Hardness, Rockwell B (converted from Brinell hardness)

94

94

Hardness, Rockwell C (converted from Brinell hardness, value below normal HRC range, for comparison purposes only)

15

15

Hardness, Vickers (converted from Brinell hardness)

218

218

Machinability (annealed and cold drawn, based on 100 machinability for AISI 1212 steel)

60

60

 

Quality Inspection Procedures

 

Spectrometer
Spectrometer
Ultrasonic Testing
Ultrasonic Testing
Stress Corrosion Testing
Stress Corrosion Testing
Microcopy
Microcopy
Mechanical
Mechanical
Eddy Current Test
Eddy Current Test
Heat Treatment Furnace
Heat Treatment Furnace
Corrosion Test
Corrosion Test
Hydraulic Test
Hydraulic Test
Metallographic Test
Metallographic Test

FAQ 

Q: Is an alloy steel bar as strong as steel?

A: Alloy steel bars are more resistant to corrosion and can be used in high-temperature environments without fear of damage. Alloy steels can be heat-treated to increase their strength and hardness, making them even more durable. Alloy steels are generally stronger and tougher than carbon steels.

Q: What are the main benefits of using alloy steel bars?

A: Alloy steel bars offer superior strength, corrosion resistance, and high-temperature tolerance, making them suitable for heavy-duty industrial applications. Their enhanced mechanical properties improve durability and performance in demanding environments.

Q: How do different types of alloy steel bars vary in their applications?

A: Low alloy steel bars are ideal for structural applications and machinery components, while high alloy steel bars, including stainless steel, are used in aerospace, medical, and marine industries where corrosion resistance is essential.

Q: Why is precision machining important for alloy steel bars?

A: Precision machining ensures that alloy steel bars meet exact specifications, improving their fit, function, and performance in industrial applications. Processes such as bar chamfering and metal cutting enhance their usability and longevity.

Q: What industries benefit the most from alloy steel bars?

A: Industries such as construction, aerospace, automotive, medical, and oil and gas rely heavily on alloy steel bars for structural support, machinery components, and high-performance applications.

 

 

We're well-known as one of the leading alloy steel bar manufacturers in China. Please feel free to buy cheap alloy steel bar for sale here and get pricelist from our factory. For price consultation, contact us.

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