Tempered Glass — Custom Sizes 3–12mm | Safety Certified | MONTAG

Tempered glass — also known as toughened glass — is a high-performance safety glass manufactured through controlled thermal treatment. Heating float glass to approximately 650°C followed by rapid air cooling creates balanced internal compressive stress, delivering 3–5 times the bending strength of annealed glass. When broken, it shatters into small, blunt granular pieces rather than sharp shards, significantly reducing injury risk.

MONTAG supplies tempered glass in thicknesses from 3mm to 12mm, with custom sizes up to 7000×2600mm. All products are certified to ANSI Z97.1, EN 12150, and CCC standards. Engineered for B2B buyers in construction, furniture manufacturing, and appliance industries.

Certified to applicable international standards — [view certificates](/about-us#certifications)

What Is Tempered Glass?

Tempered glass is produced from premium float glass through a strict heat-treating process. The glass is heated to around 650°C for uniform softening, then rapidly cooled by high-pressure air. This creates compressive stress on the surface and tensile stress in the core — the mechanism behind its superior mechanical performance.

Compared to ordinary annealed glass, tempered glass delivers:

• Bending strength ≥ 90MPa — 3 to 5 times stronger than standard flat glass
• Thermal shock resistance ≥ 200°C temperature differential — no cracking under rapid temperature changes
• Safe breakage pattern — breaks into blunt, honeycomb-shaped granules with no sharp edges
• Mohs hardness ≥ 6H — excellent scratch resistance for long-term surface clarity
• Weathering resistance — stable performance under UV exposure, humidity, and temperature cycling

For large-scale projects and batch production clients, our standardized production line ensures consistent thickness, flatness, and performance across every batch — guaranteeing uniform installation appearance and reliable delivery schedules.

Performance Specifications

These specifications translate directly to project outcomes: consistent quality across large orders means fewer field breakage claims, predictable installation timelines, and lower long-term maintenance costs. For example, 6mm tempered glass achieves the bending strength of 18mm annealed glass — enabling lighter, thinner designs without compromising safety, which reduces both material weight and shipping costs across large-scale orders.

Thickness Guide & Applications

This thickness range covers most residential and commercial requirements. For specialized load calculations or non-standard dimensions, our technical team provides free sizing recommendations.

Surface Treatments & Customization

Beyond standard clear tempered glass, we offer multiple surface processing options to match diverse design requirements:

• Frosted / acid-etched — privacy glazing for bathrooms, offices, and partitions
• Patterned (fluted / reeded) — textured glass for decorative and privacy applications
• Screen printing — custom logos, gradients, or decorative patterns fired into the glass surface
• Color coating — durable colored finishes for architectural accents

Functional Upgrades

• Explosion-proof film — locks fractured glass fragments in place, preventing fallout; recommended for high-rise glazing and public safety areas
• Ultra-clear substrate — eliminates the green tint of standard glass, offering higher light transmittance and a premium visual effect; ideal for high-end real estate and boutique interiors
• Anti-scratch / easy-clean coating — enhances surface durability and reduces maintenance frequency

For projects requiring multi-layer safety performance, tempered glass can also be laminated with PVB or SGP interlayers — see our laminated glass product page for details.

Spontaneous Breakage Rate & Quality Control

Spontaneous breakage is an inherent characteristic of tempered glass, caused primarily by microscopic nickel sulfide (NiS) inclusions in the raw material. While the probability is extremely low, it cannot be entirely eliminated.

Ultra-clear tempered glass reduces risk by using higher-purity substrate with lower NiS content. For B2B project clients, we apply multi-stage raw material screening and precision edge processing to minimize this risk. Every order includes quality inspection reports, and we provide a complete after-sales replacement policy.

Applications

Tempered glass is the standard safety glazing material across multiple industries:

• Architecture — windows, doors, curtain walls, balustrades, skylights
• Interior design — shower enclosures, glass partitions, railings, tabletops
• Furniture manufacturing — cabinet doors, display cases, shelving
• Appliance industry — oven doors, refrigerator shelves, equipment panels
• Commercial projects — storefronts, display windows, safety barriers

Project Examples:

Hotel chain shower enclosures — 8mm tempered glass, 50+ rooms per project, zero breakage claims over 2 years of operation.

Commercial curtain wall — 12mm tempered panels for a 20-story office tower, custom-cut to 2400×1800mm with polished edges for frameless installation.

Retail storefront replacement — 10mm tempered glass for high-traffic shopping mall entrances, screen-printed with brand logo.

For solar applications requiring specialized light transmission, see our solar glass product line. For reflective applications, our aluminum mirror products offer silver-coated and copper-free options.

B2B Order Information

Maintenance Guidelines

Proper maintenance extends the service life of tempered glass:

• Avoid hard impact on glass edges and corners — the weakest stress concentration points
• Regularly inspect hardware fittings and tightness to prevent stress-induced cracking
• Clean with mild neutral detergent and soft cloth; avoid abrasive tools that may scratch the surface
• For B2B batch clients, we provide unified maintenance guidelines and project after-sales support

FAQ

What is the difference between tempered glass and toughened glass?

They are the same product. "Tempered glass" is the common term in North America, while "toughened glass" is preferred in British English and Commonwealth markets. Both refer to safety glass processed through thermal tempering to achieve enhanced strength and safe breakage characteristics.

What thickness of tempered glass do I need for a shower enclosure?

6mm or 8mm tempered glass is standard for shower enclosures. 8mm is recommended for larger panels or hinged doors where additional rigidity is needed.

Can tempered glass be cut or drilled after tempering?

No. All cutting, drilling, and edge processing must be completed before the tempering process. Post-tempering modifications will cause the glass to shatter. We support fully custom dimensions — provide your drawings and we handle the rest.

What certifications are available?

Our tempered glass complies with ANSI Z97.1 (US), EN 12150 (Europe), and CCC (China). Test reports and certificates are provided with each shipment.

What is the lead time for bulk orders?

Lead time depends on order volume and customization requirements. Contact us with your project specifications for a detailed production and delivery schedule.

Need a quote for your project?

Send us your drawings or specifications — our team responds within 24 hours with pricing, lead time, and technical recommendations.