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When you need a material that stays rock-solid in size no matter the temperature, UNS K93600 alloy steel plate, also known as Invar 36, is the answer.
Supplied by Gangsteel, a trusted stainless steel supplier in China, this nickel-iron alloy is renowned for its UNS K93600 low thermal expansion, making it perfect for precision instruments, aerospace components, and cryogenic applications.
Gangsteel offers UNS K93600 plate, sheet, bar, and custom components, meeting ASTM F1684 and ASME SF1684 standards. This page dives into the UNS K93600 chemical composition, mechanical properties, equivalent materials, specifications, applications, and competitive UNS K93600 price per kg. Explore our nickel alloy steel grades for related alloys like UNS N06625, UNS N08031, and UNS R20033.
UNS K93600, or Invar 36, is a nickel-iron alloy with 36% nickel, engineered for an exceptionally low coefficient of thermal expansion (CTE) of ~1.2 µm/m·K, ensuring dimensional stability from -250°C to 200°C. This makes UNS K93600 material ideal for precision applications like telescope mirrors, cryogenic systems, and aerospace tooling. Compared to UNS N08031, which focuses on corrosion resistance, UNS K93600 prioritizes dimensional stability, with moderate corrosion resistance in atmospheric conditions.
Gangsteel’s UNS K93600 alloy steel plate is designed for projects where precision is non-negotiable, offering a reliable alternative to nickel alloy steel grades like UNS N06625 or UNS N04400.
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The UNS K93600 chemical composition, compliant with ASTM F1684, is optimized for minimal thermal expansion.
Element |
Percentage (%) |
---|---|
Nickel (Ni) |
35.0 – 37.0 |
Iron (Fe) |
Balance (~62%) |
Manganese (Mn) |
≤ 0.5 |
Silicon (Si) |
≤ 0.25 |
Carbon (C) |
≤ 0.05 |
Phosphorus (P) |
≤ 0.02 |
Sulfur (S) |
≤ 0.015 |
Chromium (Cr) |
≤ 0.2 |
Cobalt (Co) |
≤ 0.5 |
Note: The controlled nickel content ensures UNS K93600’s low CTE, making it ideal for precision applications compared to UNS R20033, which focuses on corrosion resistance.
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The UNS K93600 mechanical properties, tested per ASTM F1684, provide adequate strength and machinability for precision applications.
Property |
Value at 20°C |
Value at 204°C (400°F) |
---|---|---|
Tensile Strength (MPa) |
400 – 550 (58-80 ksi) |
~350 (51 ksi) |
Yield Strength (MPa) |
240 – 300 (35-44 ksi) |
~200 (29 ksi) |
Elongation (%) |
~30 |
~35 |
Hardness (HRB) |
~70 |
- |
Density |
8.05 g/cm³ (0.291 lb/in³) |
- |
Note: Annealing at 830-870°C (1526-1598°F) optimizes Invar 36 mechanical properties. Contact Gangsteel for a detailed UNS K93600 technical data sheet.
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The allowable stress values for UNS K93600, per ASME BPVC Section II, Part D, ensure reliable performance in precision applications.
Temperature (°C) |
Allowable Stress (MPa) |
---|---|
100 |
160 |
200 |
140 |
300 |
120 |
400 |
100 |
500 |
80 |
Note: These values ensure UNS K93600 material maintains dimensional stability in precision instruments and cryogenic systems.
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UNS K93600aligns with international standards for global compatibility.
Standard |
Grade |
---|---|
UNS |
K93600, K93603 |
W.Nr. |
1.3912 |
EN |
Ni36 |
ASTM |
F1684 |
ASME |
SF1684 |
AFNOR |
NF A54-301 (chemistry only) |
Note: UNS K93600 equivalent grades comply with ASTM F1684, offering interchangeability with alloys like UNS K94100 (Alloy 42) for less stringent applications.
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Choosing the right material for your project can save time and money. Here’s how UNS K93600 stacks up against UNS N08031, UNS N06625, and SS316:
Property |
UNS K93600 (Invar 36) |
UNS N08031 (Alloy 31) |
UNS N06625 (Alloy 625) |
SS316/316L |
---|---|---|---|---|
UNS Number |
K93600 |
N08031 |
N06625 |
S31600/S31603 |
Nickel Content |
35.0-37.0% |
30.0-32.0% |
~58% |
10.0-14.0% |
Chromium Content |
≤ 0.2% |
26.0-28.0% |
20.0-23.0% |
16.0-18.0% |
Molybdenum Content |
- |
6.0-7.0% |
8.0-10.0% |
2.0-3.0% |
Additional Elements |
Fe (~62%) |
Cu, N |
Nb, Ti |
- |
Key Property |
Low CTE (~1.2 µm/m·K) |
Excellent corrosion resistance, PREN ~48 |
Excellent corrosion/strength |
General corrosion resistance |
Strength |
Moderate |
Moderate |
High |
Moderate |
Temp Range |
-250°C to 200°C |
Up to 500°C (932°F) |
Up to 1000°C (1832°F) |
Up to 870°C (1600°F) |
Cost (USD/kg) |
25-45 |
25-40 |
40-60 |
5-15 |
Applications |
Precision instruments, aerospace |
Chemical, fertilizer |
Aerospace, nuclear |
Food, pharma |
Conclusion: Choose UNS K93600 alloy steel plate for precision applications requiring minimal thermal expansion, UNS N08031 for acid corrosion resistance, UNS N06625 for high-temperature strength, or SS316 for cost-effective general use.
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Gangsteel provides UNS K93600 alloy steel plate, sheet, bar, and custom components to meet your exact project needs:
Note: Need a specific size or finish? Gangsteel offers custom solutions, including annealing at 830-870°C. Contact us for bespoke UNS K93600 material specifications.
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UNS K93600is the go-to material when precision and stability are critical. Key UNS K93600 applications include:
Note: Unlike UNS N06625, which focuses on high-temperature strength, UNS K93600 is optimized for dimensional stability in precision settings.
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The UNS K93600 price per kg ranges from USD 25-45 per kg (FOB), driven by:
For a precise UNS K93600 price per kg or bulk discounts, contact Gangsteel. We’ll help you stay within budget while meeting your project timeline.
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Gangsteel offers a wide range of nickel alloy steel grades to complement UNS K93600 for various applications:
Note: These alloys complement UNS K93600 alloy steel plate in precision, aerospace, and corrosion-resistant applications. Contact Gangsteel for a full catalog to find the perfect material for your project.
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When precision and reliability are critical, you need a supplier who delivers quality and value. Here’s why Gangsteel is your trusted partner for UNS K93600:
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For projects where dimensional stability is critical, UNS K93600 alloy steel plate from Gangsteel delivers unmatched performance. Its ultra-low thermal expansion makes UNS K93600 material the top choice for precision instruments, aerospace tooling, and cryogenic systems, outperforming UNS N08031 in applications where corrosion resistance takes a backseat to stability. Available in versatile specifications (0.5-50 mm thickness, up to 2500 mm width) and equivalent grades (W.Nr. 1.3912, EN Ni36), Gangsteel offers quality at a competitive UNS K93600 price per kg (USD 25-45/kg).
Contact Gangsteeltoday for a quick quote on UNS K93600 price per kg or to request a detailed Invar 36 technical data sheet. Browse our nickel alloy steel grades to find the perfect solution for your precision needs!
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