EN
Custom 4J32 Precision Alloy Rods Wholesale - Controlled Expansion Alloy Bar Manufacturer
As a trusted China supplier, we provide custom diameters, lengths, and finishes of 4J32 super invar rods with strict YB/T 5241 compliance, competitive wholesale pricing, and fast global delivery. Ideal for cryogenic precision parts, optical frames, and metrology standards—order custom 4J32 controlled expansion alloy bars today.
- Overview
- Specification
- Features & Applications
- FAQs
- Recommended Products
Product Introduction Overview
4J32 (Super-Invar 32-5, UNS K93500 equivalent) is an advanced iron-nickel-cobalt controlled expansion alloy rod engineered for ultra-low thermal expansion and superior dimensional stability. Manufactured in China to YB/T 5241-2005 standards, this precision alloy rod features a very low coefficient of thermal expansion — significantly lower than Invar 36 (4J36) between -60°C and +80°C — making it perfect for applications requiring minimal size change over wide temperature variations.
As a professional China manufacturer specializing in wholesale custom 4J32 precision alloy rods, we deliver high-purity Fe-Ni-Co super invar bars with excellent machinability, good plasticity, and reliable low-temperature performance. Whether for bulk wholesale orders or tailored diameters/lengths, our direct factory supply ensures cost-effective, high-precision controlled expansion alloy solutions for global buyers in instrumentation, aerospace, and scientific sectors.
Product Features
Our custom 4J32 controlled expansion alloy rods excel with premium characteristics optimized for demanding precision uses:
- Ultra-low thermal expansion (α ≈ 0.6-1.0 × 10⁻⁶/°C from 20-100°C; even lower in -60°C to +80°C range) for superior stability over Invar 36
- Enhanced dimensional accuracy in cryogenic and near-room temperature environments with minimal drift
- Good mechanical properties — excellent plasticity, toughness, and machinability similar to austenitic alloys
- High-purity Fe-Ni-Co composition (31.5-33% Ni, 3.2-4.2% Co, balance Fe) with controlled impurities for consistent performance
- Custom rod configurations — diameters from 5mm to 180mm, lengths up to 3000mm+, hot-rolled/cold-drawn/forged finishes available wholesale
- Competitive China wholesale pricing from factory-direct manufacturer with full traceability and quality certification
These attributes position our 4J32 super invar precision alloy rods as the preferred choice for buyers seeking ultra low expansion controlled alloy bars in custom wholesale quantities.
Product Applications
Custom 4J32 low thermal expansion precision alloy rods deliver outstanding performance in temperature-critical industries:
- Precision instrumentation — resonator cavities, clock balance wheels, standard scales, and metrology frames requiring constant dimensions
- Aerospace and aviation components — structural parts, optical benches, and frameworks for minimal thermal distortion
- Cryogenic and low-temperature devices — parts for LNG systems, superconducting equipment, and scientific instruments
- Telecommunications and electronics — RF components, thermal bimetal passive layers, and devices with low scale drift
- Optical and laser systems — precision mounts, astronomical instrument frames, and high-accuracy positioning elements
Purchase wholesale custom 4J32 super invar controlled expansion rods from our China manufacturer to achieve unmatched stability in these high-precision applications.
Product FAQ
Q1: What makes 4J32 super invar alloy rods have lower expansion than Invar 36?
A: 4J32 controlled expansion alloy (Super-Invar) features added cobalt and adjusted nickel content, achieving α ≤ 1.0 × 10⁻⁶/°C (20-100°C) and even lower values from -60°C to +80°C — outperforming standard Invar 36 in this critical range for ultra precision needs.
Q2: Can I order custom sizes and finishes for 4J32 precision alloy rods wholesale from China?
A: Yes! As a dedicated China manufacturer, we offer fully custom 4J32 super invar rods — diameters, lengths, tolerances, and surface finishes (cold-drawn, ground, polished) at competitive wholesale prices with quick lead times.
Q3: What are the primary applications for 4J32 low thermal expansion alloy bars?
A: 4J32 controlled expansion rods excel in precision instruments, cryogenic parts, aerospace tooling, optical systems, and metrology where dimensional stability across temperature changes is essential.
Q4: Is 4J32 super invar precision alloy rod machinable and weldable?
A: Yes, our 4J32 Fe-Ni-Co alloy rods offer good machinability and weldability using standard techniques for nickel-based alloys, with stable performance post-processing.
Q5: Why source custom 4J32 rods wholesale from your China manufacturer?
A: We provide YB/T 5241-certified high-quality 4J32 precision alloy rods with rigorous composition control, global export experience, factory-direct wholesale pricing, and reliable supply — ideal for international buyers demanding ultra low expansion performance.
