{"id":2861,"date":"2026-03-17T05:37:08","date_gmt":"2026-03-17T05:37:08","guid":{"rendered":"https:\/\/saiweiglass.com\/?p=2861"},"modified":"2026-03-17T05:59:09","modified_gmt":"2026-03-17T05:59:09","slug":"what-ik10-really-means-for-hmi-cover-glass-assemblies","status":"publish","type":"post","link":"https:\/\/saiweiglass.com\/es\/blog\/what-ik10-really-means-for-hmi-cover-glass-assemblies\/","title":{"rendered":"What IK10 Really Means for HMI Cover Glass Assemblies [Guide]"},"content":{"rendered":"
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Understanding IK10 Protection: A Glass Manufacturer’s Guide to HMI Cover Glass Assemblies<\/strong><\/p>\n

Before you buy cover glass for an industrial HMI display, you have most definitely encountered the term “IK10” in datasheets and RFQ specifications. But what does IK10 really mean for your cover glass assembly – and how do you ensure the finished product truly passes muster?<\/p>\n

This guide breaks down the IEC 62262<\/a> impact protection standard from a glass manufacturer’s perspective. We explain the full IK rating scale, the specific test that defines IK10, the glass types and thicknesses that best fulfil this requirement, and the assembly decisions that determine whether your HMI cover glass survives a 20-joule impact or shatters on contact.<\/p>\n

<\/p>\n

What Is the IK Rating System Under IEC 62262?<\/h2>\n

\"What<\/p>\n

IK ratings are international classifications that measure the ability of an enclosure to resist external mechanical impacts. Created by IEC 62262:2002<\/a> (adopted in Europe as EN 62262), the IK code gives a two-digit classification – from IK00 to IK10 – to represent the level of impact energy a product can resist without functional failure.<\/p>\n

According to the historical record of this standard<\/a>, the first IK code was promulgated in European Standard BS EN 50102 in 1995. Prior to IEC 62262’s publication, manufacturers sometimes appended a third numeral to the IP (Ingress Protection) code to indicate impact resistance – an unofficial and confusing practice. The IEC solved this discrepancy by creating a dedicated standard that established its own two-digit numbering system.<\/p>\n

Here’s the whole IK rating scale along with the corresponding impact energy and test parameters:<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
IK Rating<\/th>\nImpact Energy (Joules)<\/th>\nEquivalent Drop Test<\/th>\n<\/tr>\n<\/thead>\n
IK00<\/td>\nNo protection<\/td>\n\u2014<\/td>\n<\/tr>\n
IK01<\/td>\n0.14 J<\/td>\n0.25 kg from 56 mm<\/td>\n<\/tr>\n
IK02<\/td>\n0.2 J<\/td>\n0.25 kg from 80 mm<\/td>\n<\/tr>\n
IK03<\/td>\n0.35 J<\/td>\n0.25 kg from 140 mm<\/td>\n<\/tr>\n
IK04<\/td>\n0.5 J<\/td>\n0.25 kg from 200 mm<\/td>\n<\/tr>\n
IK05<\/td>\n0.7 J<\/td>\n0.25 kg from 280 mm<\/td>\n<\/tr>\n
IK06<\/td>\n1 J<\/td>\n0.25 kg from 400 mm<\/td>\n<\/tr>\n
IK07<\/td>\n2 J<\/td>\n0.5 kg from 400 mm<\/td>\n<\/tr>\n
IK08<\/td>\n5 J<\/td>\n1.7 kg from 300 mm<\/td>\n<\/tr>\n
IK09<\/td>\n10 J<\/td>\n5 kg from 200 mm<\/td>\n<\/tr>\n
IK10<\/td>\n20 J<\/td>\n5 kg from 400 mm<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Notice the large gain in energy from IK09 (10 J) to IK10 (20 J) – the highest standard rating doubles the impact threshold. In 2021, the IEC published IK11 at 50 joules via an Amendment 1 that year, but IK10 or one of its higher designations are still most commonly used when specifying industrial HMI screens.<\/p>\n

\n
\ud83d\udca1<\/span> Key Takeaway<\/strong><\/div>\n

The IK rating scales exclusively address the mechanical impact robustness – it does not account for dust or water ingress – that is regulated separately to standard IEC 60529 with the IP (Ingress Protection) code.<\/p>\n<\/div>\n

<\/p>\n

IK10 Explained \u2014 What Does 20 Joules of Impact Really Look Like?<\/h2>\n

\"IK10<\/p>\n

An IK10 rating means your cover glass assembly can endure a single 20-joule impact without shattering, developing a crack, or losing function. The test protocol dictated by IEC 62262 and its companion standard IEC 60068-2-75 requires a 5 kilogram steel mass to be dropped from 400 mm above the test article – or alternatively a calibrated Charpy pendulum hammer which delivers the same energy level to the test sample.<\/p>\n

\n
\n
20 J<\/div>\n
Impact Energy<\/div>\n<\/div>\n
\n
5 kg<\/div>\n
Steel Mass<\/div>\n<\/div>\n
\n
400 mm<\/div>\n
Drop Height<\/div>\n<\/div>\n<\/div>\n

From a practical perspective, 20 joules equates to swinging a heavy wrench into a display panel at full arm speed, or a screen being struck by a piece of factory debris kicked up by a forklift. Each exposed surface of the specimen is subjected to five separate impacts at different angles – front, sides, corners, and top – to replicate the effects of actual strikes which rarely come from a single, easy to predict source.<\/p>\n

At our plant we run IK10 validation tests on cover glass samples before sending production batches to the field. These results reveal hazards that lab-grade material specs alone cannot predict: propagation pathways for edge-chip breakouts, adhesive delamination under repetitive shock, and stress fractures originating in drill holes or cutout corners. A pane of glass that looks “strong” on paper can fail on the first pendulum strike if edge finishing or tempering profile is not optimal.<\/p>\n

\n
\ud83d\udca1<\/span> Key Takeaway<\/strong><\/div>\n

IK10 is not merely glass thickness applicability. IK10 testing assesses the system as a whole – glass, adhesion, mounting, and enclosure – as a cohesive response to external loads. A thick pane of poorly bonded glass in the framework can still fail.<\/p>\n<\/div>\n

<\/p>\n

Why Industrial HMI Displays Require IK10-Rated Cover Glass<\/h2>\n

\"Why<\/p>\n

HMI (Human-Machine Interface) panels are placed in situations where physical shock is commonplace – not a black swan. If an institution chooses anything below IK10 in those circumstances, it is allowing a point of failure that costs far more in remediation than the pane itself.<\/p>\n

Here are the main application environments where IK10-rated vandal proof glass is required or highly advisable:<\/p>\n

\n\n\n\n\n\n\n\n\n\n
Environment<\/th>\nImpact Source<\/th>\nWhy IK10<\/th>\n<\/tr>\n<\/thead>\n
Factory floor HMI<\/td>\nTools, parts, forklift debris<\/td>\nUncontrolled projectiles in heavy manufacturing zones<\/td>\n<\/tr>\n
Outdoor kiosks & EV chargers<\/td>\nVandalism, thrown objects<\/td>\nUnsupervised public access; deliberate damage risk<\/td>\n<\/tr>\n
Marine & offshore panels<\/td>\nEquipment shifting in rough seas<\/td>\nVibration + sudden impacts from unsecured gear<\/td>\n<\/tr>\n
Mining & heavy equipment<\/td>\nRock fall, tool strikes<\/td>\nContinuous exposure to high-energy impacts<\/td>\n<\/tr>\n
Transportation displays<\/td>\nVibration fatigue, passenger abuse<\/td>\nConstant mechanical stress + vandalism window<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\n
\u26a0\ufe0f<\/span> Common Mistake<\/strong><\/div>\n

Many buying departments specify IK08 (5 joules) in order to trim cost, believing their factory or kiosk environment is “low risk.” In reality, a single dropped hand tool or a chunk of ejected material is enough to go well past 5 joules. That jump from IK08 to IK10 represents a 4-fold increase in durability – but the cost difference between 4 mm and 6 mm tempered cover glass is far less than the life-cycle cost of field repairs, production loss, and safety report uploads.<\/p>\n<\/div>\n

Total up the project cost of failure: replacement glass, engineer travel, production line shutdown while the panel goes down, and personal injury liability from broken shards. In an outdoor installation, one act of vandalism renders a project uneconomical unless each panel receives IK10 up-front.<\/p>\n

<\/p>\n

Glass Material and Thickness Selection for IK10 Compliance<\/h2>\n

Achieving IK10 levels of toughness begins with selecting appropriate glass for the application. Two major approaches for stiffening HMI cover glass – physical tempering and chemical strengthening – react very differently when the target is 20 joules impact resistance.<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n
Property<\/th>\nPhysically Tempered Glass<\/th>\nChemically Strengthened Glass<\/a><\/th>\n<\/tr>\n<\/thead>\n
Practical thickness for IK10<\/td>\n4\u20138 mm<\/td>\nGenerally not suitable alone<\/td>\n<\/tr>\n
Thickness range<\/td>\n3 mm and above (no upper limit)<\/td>\n0.4\u20132 mm (e.g., Corning Gorilla series)<\/td>\n<\/tr>\n
Strengthening mechanism<\/td>\nRapid cooling creates surface compression<\/td>\nIon exchange deepens compression layer<\/td>\n<\/tr>\n
Typical CS \/ DOL<\/td>\n~100 MPa surface compression<\/td>\nCS >450 MPa, DOL >8 \u03bcm<\/td>\n<\/tr>\n
Break pattern<\/td>\nSmall granular fragments (safety glass)<\/td>\nLarger shards (not classified as safety glass)<\/td>\n<\/tr>\n
Best fit for IK10<\/td>\nPrimary choice \u2014 6 mm soda-lime tempered is the standard<\/td>\nSupplementary role \u2014 adds scratch resistance on thinner panels<\/td>\n<\/tr>\n
Post-processing<\/td>\nNo cutting\/drilling after tempering<\/td>\nCan be cut after strengthening<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Here are the practical implications of this fact: chemical strengthening provides excellent scratch quality and very high compressive stress (CS > 450 MPa with depth of layer > 8 \u03bcm in our production line) – but it suits thin glass only. When IK10-level impact protection is required, the glass must be thick enough to absorb 20 joules, and that generally points to physical tempering at 4 mm minimum, with 6 mm being the more standard dimension for most sizes of HMI panel.<\/p>\n

The choice of parent material should not be disregarded. Soda-lime glass is the most affordable tempered IK10 cover glass and suitable in most machinery-based HMI environments. Aluminosilicate offers higher inherent resilience – maintaining IK10 with a thinner profile, at higher material cost. It is better suited to applications where weight or optical performance is critical.<\/p>\n

We routinely manufacture IK10 rated cover glass in soda-lime substrates and aluminosilicate substrates. 90% of industrial HMI IK10 applications can use 6 mm Tempered soda-lime glass with proper edge finishing for IK10 performance at the lowest cost.<\/p>\n

\u2014 SW Glass Engineering Team<\/cite><\/p><\/blockquote>\n

\n
\ud83d\udca1<\/span> Key Takeaway<\/strong><\/div>\n

For any IK10, pick physically tempered glass in 4-8 mm thickness. Use chemical strengthening as an add on for scratch resistance, not as the primary impact protection strategy.<\/p>\n<\/div>\n

<\/p>\n

How Cover Glass Assembly Methods Affect IK10 Performance<\/h2>\n

\"How<\/p>\n

A cover glass panel that passes IK10 in a test bench can fail in the field depending on the assembly technique. How cover glass is bonded to the display module and placed in the enclosure housing determines if the glass will take the impact, or transfer the load to a weak point resulting in a crack.<\/p>\n

There are two primary bonding strategies for HMI cover glass assemblies:<\/p>\n

Optical Bonding (OCA\/OCR)<\/h3>\n

Optical bonding uses an OCA film or OCR liquid resin to eliminate the air gap between cover glass and the LCD or touch sensor. OCA\/OCR spreads across the entire interface, creating an optical composite where the cover glass and display work as a single, rigid element.<\/p>\n

For IK10 use, optical bonding offers a clear mechanical advantage: impact energy is spread across the cover glass rather than concentrated at the edge gasket points. It is much more resistant to the type of impact IK10 testing applies.<\/p>\n

Gasket (Air Gap) Bonding<\/h3>\n

Gasket mounting bonds the cover glass to the housing by a perimeter foam or rubber seal. It is lower cost and easier for field service. However, the air gap causes more deflection on impact, and stress greater at the gasket contact points\u2014and more likely to crack an edge.<\/p>\n

\n
\ud83d\udca1<\/span> Pro Tip \u2014 Our Assembly Selection Process for IK10 Projects<\/strong><\/div>\n

For select IK10 applications, we approach the decision of optical bonding versus gasket mounting by taking three steps:<\/p>\n

    \n
  1. Display size: Panels larger than 10 inches benefit most from optical bonding because the unsupported glass span increases deflection risk under impact.<\/li>\n
  2. Field repairability: If the customer is expected to replace cover glass repeatedly in the field, gasket mounting with thicker glass (8mm) may be a better compromise than optical bonding.<\/li>\n
  3. Optical quality: Outdoor-readable displays usually require optical bonding for sunlight readability, but that advantage in IK10 durability does not require additional structural support.<\/li>\n<\/ol>\n<\/div>\n

    No matter how the cover glass is mounted, the structural support from the housing must adequately support the edges of the glass. A free-floating cover glass with only adhesive contact at the bezel will not perform as well as a cover glass mounted within a channel with gasket contact on all four sides of the glass in IK10 impacts.<\/p>\n

    <\/p>\n

    IK10 and IP Ratings \u2014 Complementary Protection for HMI Enclosures<\/h2>\n

    \"IK10<\/p>\n

    IK and IP ratings protect against different threats and are regulated by different codes. The IP (Ingress Protection) code under IEC 60529<\/a> determines protection against dust and water ingression. The IK code (IEC 62262) determines protection against mechanical impacts. Neither code replaces the other – an enclosure with an IP67 rating can still have a cover glass that cracks when struck with a wrench, and a panel rated IK10 can still leak water through unsealed gaskets.<\/p>\n

    The IPS and IKs are typically specified as a pair for industrial HMI installations. Some of the most frequently encountered IP + IK combinations found in customer specifications are:<\/p>\n

    \n\n\n\n\n\n\n\n\n\n
    IP + IK Combo<\/th>\nProtection Level<\/th>\nTypical Application<\/th>\n<\/tr>\n<\/thead>\n
    IP54 + IK08<\/td>\nDust-protected, splash-proof, moderate impact<\/td>\nIndoor factory HMI, control room panels<\/td>\n<\/tr>\n
    IP65 + IK08<\/td>\nDust-tight, low-pressure water jets, moderate impact<\/td>\nWashdown-area panels, food processing<\/td>\n<\/tr>\n
    IP65 + IK10<\/td>\nDust-tight, water jets, maximum impact<\/td>\nOutdoor kiosks, EV charging stations<\/td>\n<\/tr>\n
    IP66 + IK10<\/td>\nDust-tight, powerful water jets, maximum impact<\/td>\nMarine displays, heavy industry, mining<\/td>\n<\/tr>\n
    IP67 + IK10<\/td>\nDust-tight, temporary immersion, maximum impact<\/td>\nSubmersible equipment, extreme environments<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

    When you specify cover glass for a dual-rated enclosure, the glass itself primarily contributes to the IK rating. IP protection relies upon the sealing system – gaskets, adhesive beads, and O-rings around the glass perimeter. Optical bonding solves both problems – removes the internal air gap (eliminating a potential pathway for water ingress) and also increases impact rigidity in one step.<\/p>\n

    \n
    \ud83d\udca1<\/span> Key Takeaway<\/strong><\/div>\n

    Always specify IK and IP ratings together. An HMI panel rated IP65 without an IK rating has no guaranteed impact protection – even though it is fully sealed against dust and water.<\/p>\n<\/div>\n

    <\/p>\n

    How to Specify IK10 Cover Glass for Your HMI Project<\/h2>\n

    Submit an RFQ on IK10 cover glass, the intricacy of your specification will directly impact whether your first sample passes testing or you’ve got to go through many revision cycles. Below is the specification checklist our engineering team suggests for any IK10 cover glass application:<\/p>\n