Finetech Engineering

Izod & Charpy Impact Tester

Trusted Izod Charpy impact tester manufacturer India and pendulum impact testing machine manufacturer India - Finetech Engineering, Thane, ISO 9001:2015 certified
Izod impact tester manufacturer India and Charpy impact tester manufacturer India - both test modes on one machine. Swap the specimen fixture in minutes to switch between Izod and Charpy
ASTM D256 Izod impact tester manufacturer India and ISO 179 Charpy impact tester manufacturer India - covers ASTM D256, ASTM D6110, ISO 179-1, ISO 180, and IS 3400
Interchangeable pendulum hammers from 1J to 22J - one set covers every rigid plastic from brittle PS to tough polycarbonate composites
Impact tester for plastics manufacturer India - digital energy readout with automatic friction and windage correction - no manual calculations needed
Complete understanding of Izod vs Charpy impact test difference and what is notched vs unnotched impact test - see the detailed sections below

Overview

Drop a plastic bottle cap on a hard floor. Flick a plastic clip too hard. Hit a plastic pipe fitting with a wrench by accident. What happens? The good plastic bounces back. The bad plastic cracks or shatters. The difference between those two outcomes is what this machine measures – impact resistance.

The Finetech Engineering Izod Charpy impact tester manufacturer India product is a pendulum impact testing machine manufacturer India. It works like a heavy swing: a metal pendulum hammer is raised to a fixed height, released, and swings down to hit a plastic specimen. How much energy the specimen absorbs before breaking is the impact strength. A specimen that absorbs a lot of energy = tough plastic. One that absorbs very little = brittle plastic.

As a trusted impact tester for plastics manufacturer India, Finetech Engineering builds this as a combined machine – one that handles both the ASTM D256 Izod impact tester manufacturer India test (where the specimen stands vertically, clamped at the bottom) and the ISO 179 Charpy impact tester manufacturer India test (where the specimen lies horizontally, supported at both ends). You do not need to buy two separate machines – swap the specimen holder and you switch between tests.

As an Izod impact tester manufacturer India and Charpy impact tester manufacturer India in one, the Finetech Engineering machine covers every market: ASTM D256 for North America and Indian domestic specifications, and ISO 179 for European, Asian, and international export customers. One machine serves all your customers.

Why the Notch Matters — The Science Behind Notch Geometry

The V-notch is not arbitrary. It serves a precise mechanical function: creating a controlled stress concentration that forces the specimen to fracture at a known point. Without the notch, the impact energy would be distributed across the entire specimen. With a precisely cut notch from the Finetech V notch cutter for impact testing India, the test primarily measures the material’s resistance to crack propagation – the property that matters for real-world durability.

Izod vs Charpy Impact Test Difference - Explained Simply

Feature	Izod Test	Charpy Test
How the specimen is held	Standing straight up – clamped at the bottom like a flag in the ground. The top is free to be hit.	Lying flat – supported at both ends like a bridge. The middle is hit from below.
Where the notch points	The notch faces the hammer – the hammer hits directly into the notch side.	The notch faces away from the hammer – the hammer hits the opposite side and the notch opens under tension.
ASTM standard	ASTM D256 Izod impact tester manufacturer India – ASTM D256	ASTM D6110
ISO standard	ISO 180	ISO 179 Charpy impact tester manufacturer India – ISO 179-1
Specimen size (ASTM)	63.5 x 12.7 x 3.2 mm (or 6.4 mm)	127 x 12.7 x 3.2 mm
Specimen size (ISO)	80 x 10 x 4 mm	80 x 10 x 4 mm
Result unit	ASTM D256 impact tester plastic India – J/m (Joules per metre of notch width)	J (Joules absorbed) or kJ/m2 per ISO
Most common where?	India (domestic), North America, many Asian markets	Europe, ISO-specified international export markets
Which machine?	Izod impact tester manufacturer India – Finetech Engineering combined machine	Charpy impact tester manufacturer India – same Finetech Engineering combined machine, different fixture

What Is Notched vs Unnotched Impact Test - Which One Do You Need?

Feature	Notched Impact Test (Most Common)	Unnotched Impact Test
What the specimen looks like	A rectangular plastic bar with a small V-shaped groove cut into one side – called the notch.	A plain rectangular plastic bar with no groove at all.
What it measures	How easily the plastic cracks and breaks when there is already a small flaw or sharp corner in it – which is what happens in real products.	How much energy is needed to both create a crack AND break the specimen – a higher number because you need both steps.
What values to expect	Lower numbers – the notch makes it easier to break. Example: ABS notched Izod = 10-20 kJ/m2	Higher numbers – no notch means the material must be started from scratch. Example: ABS unnotched Izod = 20-40 kJ/m2
Standard	ASTM D256 Izod impact tester manufacturer India spec (notched Izod), ASTM D6110 (notched Charpy), ISO 179 eA (notched Charpy), ISO 180 (notched Izod)	ASTM D4812 (unnotched Izod), ISO 179 eU (unnotched Charpy)
Do I need a notch cutter?	YES – you must use a precision motorised notch cutter. A hand-cut or saw-cut notch does not meet the standard and will give wrong results.	No – just cut rectangular bars. No notch cutter needed.
Which should I use?	Notched impact is the default for almost all specifications. Use this unless your customer explicitly asks for unnotched.	Only use unnotched when your customer specification explicitly requires it.

Which Pendulum Hammer Do You Need?

Choosing the correct hammer energy is the most important setup decision on your pendulum impact testing machine manufacturer India product. The rule: the absorbed energy should be between 10% and 80% of the hammer’s rated capacity.

Hammer Energy	Best For	Standard	What Happens If Wrong?
1 J	Very brittle plastics: PS (polystyrene), PMMA (acrylic), thin specimens	ISO 179 / ISO 180	If too heavy: pendulum barely slows down – result too low and inaccurate
2.75 J	Brittle-to-medium rigid plastics: PVC-U, unfilled PP, ABS (standard grade)	ASTM D256 impact tester plastic India, ISO 179 / 180	If too light: specimen may not break – invalid test. If too heavy: poor accuracy.
5.5 J (Start here)	Standard rigid plastics: PP, HDPE, ABS, nylon, PVC – covers most materials. Start with this one.	ASTM D256 Izod impact tester manufacturer India, ASTM D6110, ISO 179, ISO 180	Best starting point. Adjust up or down based on result.
11 J	Tougher plastics: filled nylon, polycarbonate, impact-modified grades	ASTM D256, ASTM D6110, ISO 179, ISO 180
22 J	High-impact materials: fibre-reinforced composites, very tough Engineering plastics	ISO 179 Charpy impact tester manufacturer India spec, ASTM D6110

Specifications

Parameter	Specification
Product Name	Izod Charpy Impact Tester Manufacturer India – Pendulum Impact Testing Machine (Pendulum Impact Testing Machine Manufacturer India, Finetech Engineering , Thane)
Also Known As	Izod Impact Tester Manufacturer India, Charpy Impact Tester Manufacturer India, Impact Tester for Plastics Manufacturer India, pendulum impact tester
Test Modes	Izod vs Charpy Impact Test Difference – both modes in one machine: Izod (cantilever, vertical) and Charpy (3-point bend, horizontal)
Standards	ASTM D256 Izod Impact Tester Manufacturer India (ASTM D256), ASTM D6110, ISO 179 Charpy Impact Tester Manufacturer India (ISO 179-1), ISO 180, IS 3400
Pendulum Hammers	1 J, 2.75 J, 5.5 J, 11 J, 22 J (interchangeable)
Pendulum Release Angle	150 degrees (per ASTM / ISO)
Impact Velocity	Approximately 3.46 m/s at point of impact
Izod Specimen Size	63.5 x 12.7 x 3.2/6.4 mm (ASTM); 80 x 10 x 4 mm (ISO)
Charpy Specimen Size	127 x 12.7 x 3.2 mm (ASTM); 80 x 10 x 4 mm (ISO)
Charpy Support Span	62 mm (ISO); 101.6 mm (ASTM)
Energy Measurement	Digital readout with automatic friction and windage correction
Resolution	0.01 J
Notch Requirements	What Is Notched vs Unnotched Impact Test – Notched: 45 deg V-notch, 0.25 mm tip radius. Unnotched: no notch.
Power Supply	230V AC, single phase, 50 Hz
Certification	ISO 9001:2015 certified. NABL-traceable calibration available.

How the Impact Test Works - Step by Step

Step 1: Prepare the Specimens

Cut rectangular plastic bars from moulded plaques using a hydraulic press (ASTM: 63.5 x 12.7 mm; ISO: 80 x 10 mm)
For notched testing (which is standard): cut a precise 45-degree V-notch using the Finetech Engineering motorised Notch Cutter – never by hand
Condition at 23 degrees C and 50% relative humidity for at least 40 hours (per ASTM D618)

Step 2: Select the Right Pendulum Hammer

Start with 5.5 J for most rigid plastics. Adjust up or down based on the result (should be 10-80% of hammer capacity)
Install the correct fixture: Izod vice clamp for ASTM D256 Izod impact tester manufacturer India spec, or Charpy support anvil for ISO 179 Charpy impact tester manufacturer India spec

Step 3: Run the Test

Clamp or place the specimen correctly in the fixture
Raise the pendulum to the release position (150 degrees)
Release – the pendulum swings down and strikes through the specimen
Read the absorbed energy from the digital display on your pendulum impact testing machine manufacturer India product

Step 4: Calculate and Report

For ASTM D256 Izod: divide absorbed energy (J) by the specimen width at the notch (m) to get kJ/m2, or by notch depth remaining to get J/m
For ISO 179 Charpy: divide absorbed energy (J) by the cross-sectional area at the notch (m2) to get kJ/m2
Test minimum 5 specimens (ASTM) or 10 specimens (ISO). Report mean and standard deviation

Applications

QC batch testing of rigid plastics - verifying impact resistance meets specification before releasing to production - the core job of every impact tester for plastics manufacturer India
Incoming raw material inspection - testing specimens moulded from purchased polymer granules
Material selection - comparing different polymer grades or additives using the ASTM D256 impact tester plastic India or ISO 179 Charpy impact tester manufacturer India method
R&D compound development - evaluating how impact modifiers, fillers, or glass fibres change toughness
Product certification - generating impact data for technical datasheets and regulatory submissions
Failure analysis - testing parts from field failures to determine if the material met specification
Sub-ambient temperature impact testing - conditioning specimens at -20 or -40 degrees and testing immediately

Industries Served

Plastic manufacturing - pipes, fittings, containers, moulded parts - the primary market for impact tester for plastics manufacturer India equipment
Automotive - bumpers, dashboards, interior trim, housings, clips
Electrical and electronics - switch housings, enclosures, connectors
Packaging - bottles, caps, crates, containers
Construction - PVC profiles, pipe fittings, polycarbonate sheets
Third-party and NABL-accredited testing laboratories - supplied by your trusted Izod Charpy impact tester manufacturer India

Why Choose the Finetech Engineering Impact Tester?

Izod + Charpy in one machine. One investment as your Izod impact tester manufacturer India AND Charpy impact tester manufacturer India covers ASTM D256 Izod impact tester manufacturer India and ISO 179 Charpy impact tester manufacturer India without two machines.

Complete pendulum range 1J to 22J. Every material from brittle PS to tough fibre-reinforced composites is covered. The Finetech Engineering pendulum impact testing machine manufacturer India product handles them all.

Digital with automatic correction. No manual calculation needed. The digital readout corrects for friction and windage automatically – giving you the true absorbed energy value every time.

Complete workflow from one manufacturer. As both your Izod Charpy impact tester manufacturer India and your notch cutter / humidity chamber / specimen press manufacturer, Finetech Engineering supplies the entire impact testing workflow. One supplier, one service contract, everything compatible.

IS 3400 for Indian market compliance. Alongside ASTM and ISO, covers IS 3400 requirements for BIS-mandated impact testing and government tenders.

NABL calibration support. Pendulum energy verification with NABL-traceable certificates. Keeps your impact tester for plastics manufacturer India audit-ready.

Related Products

Product	Why You Need It
Notch Cutter	Essential companion – cuts the V-notch in specimens before ASTM D256 impact tester plastic India or ISO 179 Charpy impact tester manufacturer India testing
Humidity Chamber	For conditioning specimens at 23 deg C / 50% RH for 40 hours before impact testing
Universal Testing Machine (UTM)	Complementary tensile, compression, and flexural testing of the same materials
Dart Impact Tester	Complementary falling-dart impact testing for plastic films and sheets
Melt Flow Index Tester	Complementary MFI testing – both MFI and impact data are needed for complete material characterisation on your impact tester for plastics manufacturer India product
Hydraulic Press	For cutting rectangular bar specimens from moulded plaques before notching
Specimen Cutters & Moulds (Full Range)	Browse all specimen preparation equipment

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Common Questions

Frequently Asked Questions

What is impact strength, explained simply?

Impact strength is how well a material handles a sudden hit without breaking. Think of it this way: drop a polystyrene cup and it shatters. Drop a polypropylene cup and it bounces. That difference in toughness is what the Finetech Engineering Izod Charpy impact tester manufacturer India measures in a controlled, standardised way. A material with high impact strength absorbs more energy before breaking - it is tougher.

Izod vs Charpy - which test does my customer want?

The Izod vs Charpy impact test difference comes down to which standard your customer specifies. If the specification says 'ASTM D256' - that is the ASTM D256 Izod impact tester manufacturer India test. If it says 'ISO 179' - that is the ISO 179 Charpy impact tester manufacturer India test. Indian domestic customers and North American export customers usually ask for Izod (ASTM D256). European and ISO-standard export customers usually ask for Charpy (ISO 179). If your specification is not clear, ask your customer before you start testing.

What is a notched vs unnotched impact test?

The question 'what is notched vs unnotched impact test' is simple. A notched specimen has a small V-shaped groove cut into it - this groove acts as a stress concentration point that makes it easier for a crack to start, giving a lower (more conservative) impact value. An unnotched specimen has no groove - the impact value is higher because the material must both start and spread the crack. Notched impact testing is the default for almost all material specifications. Use unnotched only when your customer specification explicitly asks for it.

What is ASTM D256, explained simply?

ASTM D256 is the American standard that defines the Izod notched impact test for plastics. It specifies the specimen size (63.5 x 12.7 x 3.2 mm), the notch dimensions (45 degrees, 0.25 mm radius), the pendulum speed, and how to calculate and report the result (in J/m or kJ/m2). The ASTM D256 Izod impact tester manufacturer India product from Finetech Engineering is built to comply with every requirement of this standard. It is the most widely specified impact test for rigid plastics in India and North America.

What is ISO 179 and how is it different from ASTM D256?

ISO 179 is the Charpy version of the impact test - the international standard equivalent of ASTM D256 Izod. The main differences: the specimen lies horizontal (not vertical), the pendulum hits the centre (not the free end), and the results are reported in kJ/m2 (not J/m). As a certified ISO 179 Charpy impact tester manufacturer India, Finetech Engineering builds the machine to comply with ISO 179-1 for Charpy testing. The same machine handles both ASTM D256 and ISO 179 by changing the specimen fixture.

Do I really need a separate notch cutter?

Yes, without exception. ASTM D256 and ISO 179 both require a notch with a 45-degree included angle and a 0.25 mm tip radius - precise to within 0.05 mm. A hand-cut, saw-cut, or razor-blade notch will not meet these tolerances and will give you wrong impact values that will fail quality audits. The motorised Finetech Engineering Notch Cutter is designed specifically for this purpose and pairs directly with your ASTM D256 impact tester plastic India and Izod Charpy impact tester manufacturer India machine.

What are typical impact strength values for common plastics?

These are typical notched Izod values (ASTM D256, 5.5 J hammer): Polystyrene (PS) = 1-3 kJ/m2 (very brittle). PVC rigid = 2-5 kJ/m2. PP unfilled = 2-5 kJ/m2. ABS standard = 10-20 kJ/m2. Nylon 6 = 3-8 kJ/m2. Polycarbonate = 60-80 kJ/m2 (very tough). PP impact-modified = 8-15 kJ/m2. These are indicative ranges - actual values depend on grade, additives, and processing. Test your specific material on your impact tester for plastics manufacturer India product to get your actual numbers.

Is the Finetech Engineering impact tester suitable for NABL accreditation?

Yes. The Finetech Engineering pendulum impact testing machine manufacturer India product meets the accuracy requirements of ASTM D256, ISO 179, and ISO 180 and can be calibrated with NABL-traceable pendulum energy standards. We provide full calibration documentation to support your NABL accreditation application for plastic impact testing.