Alloy 36 Low-Expansion Alloy Sheet Alloy 36: UNS K93600 Iron-Nickel Alloy Sheet by Gangsteel 

 

Gangsteel Group is a leading global supplier of Alloy 36, also known as Invar 36 or UNS K93600, offering premium Alloy 36 sheet, Alloy 36 plate, Invar 36 round bar, and custom-fabricated components.

Alloy 36is an iron-nickel alloy with 36% nickel, designed for exceptionally low thermal expansion, ideal for precision instruments, aerospace, and cryogenic applications.

This guide explores the Invar 36 composition, Alloy 36 material properties, applications and why Gangsteel is your trusted source for Alloy 36 sheet, Invar 36 plate, and round bar at competitive Invar 36 price.

 

1. What is Alloy 36?

 

Alloy 36(UNS K93600), or Invar 36, is an iron-nickel alloy with 36% nickel, engineered for minimal thermal expansion over a wide temperature range (-250°C to 200°C). Its low coefficient of thermal expansion (CTE) makes Alloy 36 sheet ideal for precision components in aerospace, electronics, and cryogenic systems. Unlike corrosion-resistant alloys like Alloy 31, Alloy 36 prioritizes dimensional stability over corrosion resistance, though it offers moderate resistance to atmospheric corrosion.

How Does Alloy 36 Compare to Alloy 42?

Alloy 36(UNS K93600) has a lower CTE (1.2 µm/m·K) than Alloy 42 (5.3 µm/m·K), making Alloy 36 sheet preferred for high-precision applications like telescope mirrors, while Alloy 42 is used in less stringent applications.

 

2. Why Choose Gangsteel’s Alloy 36 Sheet?

 

  1. Low Thermal Expansion: Alloy 36 material maintains dimensional stability from -250°C to 200°C, ideal for Alloy 36 sheet in precision instruments.
  2. Moderate Corrosion Resistance: Suitable for atmospheric conditions, complementing Alloy 400.
  3. Excellent Machinability: Facilitates precision fabrication of Alloy 36 sheet and round bar.
  4. Competitive Pricing: Invar 36 price ranges from US $25-45 per kg (FOB), offering cost-effective solutions for precision applications.
  5. Global Supply: Gangsteel delivers Alloy 36 sheet, Invar 36 plate, and round bar worldwide with EN 10204 3.1/3.2 certification.

 

3. Execution Standards for Alloy 36

 

Gangsteel’s Alloy 36 products comply with international standards:

  1. ASTM F1684: For Alloy 36 plate, sheet, and strip.
  2. ASTM B753: For Invar 36 round bar and wire.
  3. ASME SB-753: For low-expansion applications.
  4. DIN 1.3912: European standard for UNS K93600.

Note: Products are supplied with mill test certificates and tested per DNV, BV, or SGS standards, ensuring compliance with Invar 36 chemical composition and Alloy 36 material properties.

 

4. Available Specifications and Product Categories

 

Gangsteel offers a comprehensive range of Alloy 36 products tailored to UNS K93600 specifications, with a focus on Alloy 36 sheet:

4.1 Specifications

  1. Alloy 36 Sheet:
    • Thickness: 0.025mm to 4mm
    • Width: 500mm to 2000mm
    • Finish: Cold-rolled, annealed
    • Applications: Telescope mirrors, cryogenic components
  2. Alloy 36 Plate:
    • Thickness: 0.5mm to 50mm
    • Width: 1000mm to 2500mm
    • Length: 2000mm to 12000mm
    • Finish: Hot-rolled, annealed, descaled
    • Applications: Aerospace structures, precision tooling
  3. Invar 36 Round Bar:
    • Diameter: 6mm to 300mm
    • Length: Up to 6000mm
    • Finish: Hot-rolled, annealed, centerless ground
    • Applications: Precision shafts, optical mounts
  4. Custom Components:
    • Types: Flanges, fittings, CNC-cut parts
    • Sizes: Per ASME B16.5 or custom tolerances (±0.05mm)
    • Applications: Aerospace and electronic systems

4.2 Product Categories

  1. Flat Products: Alloy 36 sheet and plate for low-expansion structures.
  2. Bar Products: Invar 36 round bar for machining into precision components.
  3. Custom Fabrication: CNC-machined parts and fittings for tailored solutions.

Note: Custom sizes and finishes are available. Contact Gangsteel for bespoke Alloy 36 sheet solutions.

 

5. Composition of Invar alloy 36

 

The Invar 36 chemical composition is optimized for low thermal expansion, as per ASTM F1684:

Element

Fe

Ni

Mn

Si

C

P

S

Cr

Co

%

Bal.

35.0-37.0

≤0.5

≤0.25

≤0.05

≤0.02

≤0.015

≤0.2

≤0.5

Note: Controlled nickel content ensures Alloy 36 material’s low CTE, making Alloy 36 sheet ideal for precision applications compared to Alloy 625.

 

6. Material Properties of Alloy 36

 

  • Density: 8.05 g/cm³ (0.291 lb/in³), supporting lightweight Alloy 36 sheet designs.
  • Melting Point: 1420-1450°C (2588-2642°F), suitable for high-temperature processing.
  • Hardness: ~70 HRB (annealed), contributing to machinability.
  • Thermal Conductivity: 10.7 W/m·K at 20°C, ideal for Alloy 36 sheet in precision tooling.
  • Coefficient of Thermal Expansion: 1.2 µm/m·K (20-100°C), significantly lower than Alloy 400 (13.9 µm/m·K).
  • Magnetic: UNS K93600 is magnetic, suitable for specific electronic applications.

 

7. Mechanical Properties of Alloy 36

 

The mechanical properties of Alloy 36 material ensure reliability for Alloy 36 sheet, Invar 36 plate, and round bar, as per ASTM F1684 (annealed condition):

Property

Value at 20°C

Value at 400°F (204°C)

Description

Yield Strength

240-300 MPa (35-44 ksi)

~200 MPa (29 ksi)

Adequate strength for precision applications

Tensile Strength

400-550 MPa (58-80 ksi)

~350 MPa (51 ksi)

Ensures durability in stable environments

Elongation

~30%

~35%

High ductility for fabrication

Hardness

~70 HRB

-

Supports machinability

Note: Properties vary with heat treatment. For detailed mechanical properties of Alloy 36 sheet, contact Gangsteel for a datasheet.

 

8. Equivalent Materials and Standards

 

Alloy 36(UNS K93600) is comparable to other low-expansion alloys:

Material

Standard

Description

Alloy 36

ASTM F1684, UNS K93600

Low thermal expansion alloy

Alloy 42

UNS K94100

Higher CTE for less stringent applications

Alloy 400

UNS N04400

Corrosion-resistant, higher CTE

Alloy 625

UNS N06625

Corrosion-resistant, high CTE

Alloy C276

UNS N10276

Corrosion-resistant, high CTE

Note: Alloy 36 sheet excels in precision applications, offering advantages over Alloy K500 in dimensional stability.

9. Applications of Alloy 36 Sheet

  1. Aerospace: Alloy 36 sheet for composite tooling and satellite components, complementing Alloy 617.
  2. Precision Instruments: Invar 36 plate for telescope mirrors and laser systems.
  3. Cryogenic Systems: Alloy 36 sheet for LNG storage and transport components.
  4. Electronics: Invar 36 round bar for lead frames and thermal management.
  5. Scientific Equipment: Components leveraging Alloy 36 material’s low thermal expansion.

Note: Alloy 36 is optimized for dimensional stability, offering advantages over Alloy HX in precision applications.

 

10. Invar 36 Price

 

  • Alloy 36 Sheet: US $25-45 per kg (FOB), depending on thickness and order volume.
  • Invar 36 Plate: US $27-47 per kg (FOB), based on size and finish.
  • Invar 36 Round Bar: US $30-50 per kg (FOB), varying with diameter and finish.

Note: Invar 36 price is lower than corrosion-resistant alloys like Alloy 59 due to simpler composition. Contact Gangsteel for precise quotes.

 

11. Unique Features of Alloy 36 Sheet

 

  • Low Thermal Expansion: CTE of ~1.2 µm/m·K outperforms Alloy 690, ideal for Alloy 36 sheet in precision applications.
  • Machinability: Facilitates high-precision fabrication, unlike Alloy X-750.
  • Moderate Corrosion Resistance: Suitable for atmospheric conditions, complementing Alloy 825.
  • Diverse Forms: Available as Alloy 36 sheet, Invar 36 plate, round bar, and CNC-cut parts.

 

12. Frequently Asked Questions (FAQ)

 

  1. What is the composition of Invar 36?
    Invar 36 chemical composition includes 35-37% nickel and balance iron, optimized for Alloy 36 sheet low thermal expansion.
  2. What is the Invar 36 price?
    Ranges from US $25-50 per kg (FOB) for Alloy 36 sheet, Invar 36 plate, or round bar. Contact Gangsteel for quotes.
  3. Is UNS K93600 magnetic?
    UNS K93600 is magnetic, suitable for specific electronic applications.
  4. What are the applications of Alloy 36 sheet?
    Used in aerospace, precision instruments, and cryogenic systems for low-expansion components.
  5. How does Alloy 36 compare to Alloy 42?
    Alloy 36 has a lower CTE, while Alloy 42 is used for less stringent applications.
  6. What standards govern Alloy 36 sheet?
    ASTM F1684 and ASME SB-753, with UNS K93600 designation.
  7. Can I get a mechanical properties datasheet for Alloy 36 material?
    Contact Gangsteel for a PDF detailing tensile, yield, and thermal expansion data for Alloy 36 sheet.

 

13. Why Gangsteel?

 

  1. Competitive Pricing: Invar 36 price at US $25-50 per kg (FOB) for Alloy 36 sheet, plate, and round bars.
  2. Comprehensive Inventory: Wide range of Invar 36 sheet, plate, round bar, and custom components.
  3. Quality Assurance: EN 10204 3.1/3.2 MTCs and testing per DNV, BV, or SGS standards.
  4. Global Delivery: Serving markets in Saudi Arabia, UAE, India, and Europe with efficient logistics.
  5. Advanced Fabrication: CNC machining, annealing, and precision cutting for Alloy 36 sheet components.

 

14. Contact Gangsteel

For inquiries about Alloy 36, Alloy 36 sheet, Invar 36 plate, Invar 36 round bar, or to request a quote for Invar 36 price or a mechanical properties datasheet, contact Gangsteel Group’s sales team. Trust Gangsteel for high-quality Alloy 36 material tailored to your project’s needs, backed by expertise and reliability as leading Alloy 36 suppliers!

 

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