Invar 36 Round Bars Supplier & Exporter

Invar 36 round bar supplier, Invar 36 Square Bars, Invar Alloy 36 Hex Bars, Invar 36 round bar stockist in India.

AB Steel manufactures and supplies high-quality Invar 36 round bar, a low-expansion nickel-iron alloy designed to hold its shape when nothing else will. Engineers specify this specialized material for one critical reason: outstanding dimensional stability that does not waver with temperature. Ideal for industries where a fraction of a millimeter of thermal drift ruins the part, this stock is ready to cut, test, and ship.

What is Invar 36 Round Bar?

Precision instruments and molds can't afford to grow or shrink when the room temperature changes. Invar 36 solves exactly that problem. Built from iron with roughly 36% nickel, the alloy barely expands or contracts across a wide temperature range, which is why it ends up in components where a fraction of a millimeter of drift would ruin the part.

Features & Benefits

The coefficient of thermal expansion sits around 1.2 x 10⁻⁶ per °C between 20°C and 100°C, a fraction of what standard carbon or stainless steel moves through the same range. Strength and machinability hold up despite that stability. Service temperature runs from cryogenic levels up through roughly 230°C before expansion behavior starts to shift.

Available Sizes & Dimensions (Grades)

AB Steel stocks Invar 36 round bar from 5mm to 200mm diameter. Standard mill lengths cover most orders, with custom-cut sizes available on request. Bars ship in as-rolled or precision-ground finish depending on the tolerance an application demands.

Invar 36 Round Bars Specification

ASTM F1684 Invar 36 Bars Equivalent Grades

Invar Alloy 36 Round, Bright, Hex, Threaded Bar Chemical Composition

Types Of Available Products ASME, ASTM, EN, BS, GB, Invar 36 Round Bars

Manufacturing Process

Ingot production starts the process, using vacuum-induction or electric-arc melting to keep carbon and impurity content low enough that expansion characteristics stay on spec. Hot working then brings the ingot down to bar form. Cold drawing and annealing finish the job, locking in final dimensions and a stable structure before inspection.

Testing & Packaging (Certification)

Chemical composition testing, dimensional inspection, and mechanical property verification happen on every batch before dispatch. Nothing ships without that check. AB Steel issues Mill Test Certificates confirming compliance with ASTM F1684 alongside each order, packed in export-standard packaging built to survive transit.

Why Choose AB Steel?

We at AB Steel have stocked inventory which is properly verified and tested so that every order has validated chemistry, consistent stock and accurate export documentation that can pass customs scrutiny. We supply custom cut lengths and direct technical support to keep your project on schedule. Dimensional fluctuation cannot be tolerated in precise applications. And all deliveries are done on time. So, your activities can move forward without any back and forth communication impediments.

Industrial Applications of Invar 36 Round Bar

For applications where dimensional stability with change of temperature is non-negotiable, Invar 36 is usually the material engineers head for:

• Precision Measuring Instruments: Continuous calibration during temperature changes
• Optical and laser system parts: Keep alignment unchanged with ambient temperature changes
• Cryogenic equipment: It works at ultra-low temperatures without cracking
• Mould and tools: Used for composite fabrication, warpage during cure cycles stays modest
• Aerospace structural components: Close tolerances sustain extensive thermal cycling in flight
• Seismic and geodetic survey instrumentation: Accuracy of field measurements is maintained over the years

FAQs

Our Global network