36alloy scrap (Specialized dealer's buying price)
Graph
Monthly Average(High)
About 36alloy scrap (Specialized dealer's buying price) Data
Alloy 36, commonly known as "Invar," is a low-expansion alloy primarily composed of iron (Fe) and nickel (Ni). It is characterized by extremely minimal dimensional changes in response to temperature variations around room temperature.
1. Chemical Composition Specifications (Representative Example: UNS K93600 / Alloy 36)
The typical chemical composition guidelines for Alloy 36 are as follows:
Element | Content (%) | Role / Characteristics |
|---|---|---|
Nickel (Ni) | 35.0 – 37.0% (approx. 36%) | Main component that exhibits low thermal expansion properties |
Iron (Fe) | Balance | Base metal |
Manganese (Mn) | Max 0.60% | Adjustment of workability and deoxidation |
Carbon (C) | Max 0.10% (up to 0.15%) | Adjustment of strength and microstructure |
Silicon (Si) | Max 0.40% | Deoxidizer |
2. Main Physical Properties
Coefficient of Thermal Expansion: Extremely small, approximately 1/10th that of standard stainless steels (such as 18-8).
Magnetism: Exhibits ferromagnetism below the Curie point (around 230°C) and becomes non-magnetic above it.
Low-Temperature Properties: Maintains high toughness even in cryogenic environments and provides good weldability.
3. Main Applications
It is widely adopted in high-precision fields where expansion and contraction due to temperature fluctuations must be strictly avoided.
Precision Instruments & Measuring Devices
High-precision length scales, surveying instruments, watch hairsprings, etc.Semiconductor & LCD Manufacturing Equipment
Exposure equipment-related components and shadow masks requiring fine alignment and high dimensional accuracy.Energy & Plant-Related Fields
Membrane materials for LNG (Liquefied Natural Gas) storage tanks and carriers (to prevent structural damage from low-temperature contraction).Aerospace & Automotive Fields
Large composite molding dies for aircraft (to prevent distortion caused by thermal expansion differences during autoclave molding).Electrical & Electronic Components
Bimetals (combinations of metals with different thermal expansion rates that bend with temperature changes), trimetals, and magnetic shielding materials.