EN 1935 Door Hinge Code: 8 Digits, Grade 13, Door Weight and Corrosion

An EN 1935 door hinge code is an 8-digit string, such as 4-7-6-1-1-3-1-13, that summarises a hinge’s test results under the European standard for single-axis hinges. The last digit, the hinge grade from 1 to 14, is the most practical: grade 13 means a door hinge that passed 200,000 opening cycles on a 120 kg test door. If a hinge data sheet shows this code, you can match it to the door leaf weight and how heavily the door will be used.

Key Facts

• EN 1935 covers single-axis hinges of lift-off or fixed-pin type for windows and doors opening in one direction, with the rotation axis no more than 30 mm from the face of the leaf (2026-11-12, source: Lloyd Worrall: BS EN 1935:2002 Single axis hinges).
• Digit 2 durability: grade 3 = 10,000 cycles, grade 4 = 25,000 cycles, grade 7 = 200,000 cycles; digit 3 test door mass: grade 0 = 10 kg up to grade 7 = 160 kg (2026-11-12, source: SFS UK: Understanding BS EN 1935:2002 single-axis hinge grades).
• Hinge grade (digit 8): grade 11 = door, 200,000 cycles, 80 kg; grade 12 = 100 kg; grade 13 = 120 kg; grade 14 = 160 kg (2026-11-12, source: SFS UK: Understanding BS EN 1935:2002 single-axis hinge grades).
• EN 1670 sets neutral salt spray tests for corrosion resistance: grade 1 = 24 h, grade 2 = 48 h, grade 3 = 96 h, grade 4 = 240 h, grade 5 = 480 h (2026-11-12, source: CEN: EN 1670:2007 (SIST EN 1670:2007 preview, iTeh)).

The eight digits of the EN 1935 code

EN 1935 is the European standard for single-axis hinges. Every tested hinge receives an 8-digit code, and each digit describes one aspect of performance:

• Digit 1, category of use: 1 light, 2 medium, 3 heavy, 4 severe. All categories apply to doors; windows only to category 1.
• Digit 2, durability: 3 = 10,000 cycles, 4 = 25,000 cycles, 7 = 200,000 cycles. Grade 7 is for doors only.
• Digit 3, test door mass: 0 = 10 kg, 1 = 20 kg, 2 = 40 kg, 3 = 60 kg, 4 = 80 kg, 5 = 100 kg, 6 = 120 kg, 7 = 160 kg.
• Digit 4, fire/smoke doors: 0 not suitable; 1 suitable, subject to assessment of its contribution within the fire door assembly.
• Digit 5, safety: grade 1 only, since every hinge must be safe in use.
• Digit 6, corrosion resistance to EN 1670: 0 no defined resistance, then 1 mild, 2 moderate, 3 high, 4 very high.
• Digit 7, security: 0 not for burglar-resistant doors, 1 suitable for burglar-resistant assemblies after assessment.
• Digit 8, hinge grade: a number from 1 to 14 combining opening type, cycles and leaf mass.

Hinge grade table 1–14

Grades 1, 2, 5 and 8 are window hinges at 10,000 cycles for 10, 20, 40 and 60 kg leaves. Grades 3 and 6 are window or door hinges at 25,000 cycles for 20 and 40 kg. The door grades at 200,000 cycles are grade 4 (20 kg), 7 (40 kg), 10 (60 kg), 11 (80 kg), 12 (100 kg), 13 (120 kg) and 14 (160 kg). That is why the last “digit” can be a two-digit number.

Lloyd Worrall's example code 4-7-6-1-1-3-1-14 reads as a severe-duty hinge tested to 200,000 cycles, suitable for fire doors, with high corrosion resistance, suitable for burglar-resistant doors, and hinge grade 14. The standard also requires every hinge to be marked with the maker's name, the hinge grade and the standard number.

Corrosion resistance: what grades 3 and 4 mean

Digit 6 refers to EN 1670. That standard uses a neutral salt spray test lasting 24 hours for grade 1, 48 hours for grade 2, 96 hours for grade 3 and 240 hours for grade 4. EN 1670 also has a grade 5 at 480 hours, but EN 1935 only uses up to grade 4. For homes near the coast or bathroom doors, choose hinges with a higher corrosion digit and a suitable material, such as 304 or 316 stainless steel.

How to choose hinges for homes and projects

Weigh or calculate the door leaf first. A bedroom door made of engineered wood is far lighter than a solid timber main door or a steel door. Choose a hinge grade whose test mass equals or exceeds the door weight, and check how many hinges were used in the test according to the maker's data sheet. For heavily used doors, such as offices, schools or shophouses, choose 200,000-cycle durability (digit 2 = 7). Guild of Architectural Ironmongers guidance quoted by SFS recommends severe-duty hinges in grade 12, 13 or 14 for burglar-resistant doors.

In the Indonesian market, not every hinge comes with an EN 1935 code. When it is missing, ask for leaf thickness, pin diameter, number of bearings and material. The homeX team can help compare hinge and door hardware specifications before you buy for a project.

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FAQ

What does grade 13 mean on a door hinge? Under EN 1935, grade 13 is a door hinge that passed a 200,000-cycle test with a 120 kg test door.

Which grade for a heavy solid timber door? Work out the leaf weight first, then pick a grade whose test mass is equal or higher: grade 11 for 80 kg, 12 for 100 kg, 13 for 120 kg and 14 for 160 kg (all 200,000 cycles).

Does digit 4 = 1 make a hinge fire-rated? Digit 4 = 1 means the hinge is suitable for fire or smoke doors, subject to assessment within that fire door assembly. A hinge alone does not make a door fire-resistant.

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Sources: Lloyd Worrall: BS EN 1935:2002 Single axis hinges; SFS UK: Understanding BS EN 1935:2002 single-axis hinge grades; CEN: EN 1670:2007 (SIST EN 1670:2007 preview, iTeh)