{"id":24108,"date":"2021-12-01T13:06:32","date_gmt":"2021-12-01T12:06:32","guid":{"rendered":"https:\/\/nh-oring.de\/elongation-at-break-o-ring-lexicon\/"},"modified":"2025-05-07T12:26:15","modified_gmt":"2025-05-07T10:26:15","slug":"elongation-at-break-o-ring-lexicon","status":"publish","type":"page","link":"https:\/\/nh-oring.de\/en\/elongation-at-break-o-ring-lexicon\/","title":{"rendered":"Elongation at break | O-ring lexicon"},"content":{"rendered":"\t\t
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Elongation at break<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
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\n\t\t\t<\/i>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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#1<\/span> What is elongation at break?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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The elongation at break reflects the ability of materials to deform.<\/p>\n

In the case of O-rings, the elongation at break is determined by means of the world-famous tensile test using a material sample. The sample is clamped in a machine and stretched until it tears. The extent to which the sample could be stretched is then tested.<\/p>\n

The elongation at break is given as a percentage on each data sheet.<\/p>\n

Example: <\/b>If an O-ring material has an elongation at break of 100%, then the material could be stretched to twice its length.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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#2<\/span> Which O-ring material has which elongation at break?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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\n

Material<\/p><\/th>

Hardness<\/p><\/th>

Elongation at break <\/p><\/th>

Tear resistance<\/p><\/th><\/tr><\/thead>

FFKM<\/p><\/td>

75 Shore A<\/p><\/td>

145%<\/p><\/td>

18.0 MPa<\/p><\/td><\/tr>

FKM (Viton)<\/p><\/td>

75 Shore A<\/p><\/td>

183%<\/p><\/td>

14.9 MPa<\/p><\/td><\/tr>

FEP\/FKM<\/p><\/td>

90 Shore A<\/p><\/td>

250%<\/p><\/td>

21.4 MPa<\/p><\/td><\/tr>

PTFE<\/p><\/td>

60 Shore D<\/p><\/td>

250%<\/p><\/td>

24.5 MPa<\/p><\/td><\/tr>

Silicone<\/p><\/td>

70 Shore A<\/p><\/td>

261%<\/p><\/td>

6.1 MPa<\/p><\/td><\/tr>

HNBR<\/p><\/td>

70 Shore A<\/p><\/td>

274%<\/p><\/td>

18.0 MPa<\/p><\/td><\/tr>

EPDM<\/p><\/td>

70 Shore A<\/p><\/td>

282%<\/p><\/td>

10.9 MPa<\/p><\/td><\/tr>

FVMQ<\/p><\/td>

70 Shore A<\/p><\/td>

285%<\/p><\/td>

7.6 MPa<\/p><\/td><\/tr>

NBR<\/p><\/td>

70 Shore A<\/p><\/td>

389%<\/p><\/td>

14.4 MPa<\/p><\/td><\/tr><\/tbody><\/table>\n <\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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The mechanical load capacity of the O-ring material can be easily read from the table.<\/span><\/p>\n

Analysis of the table
<\/b>In general, it can be said that a high elongation at break results in a low tensile strength (e.g. VMQ (silicone) or FVMQ). Against this background, NBR and HNBR stand out in particular.<\/span><\/p>\n

HNBR and NBR O-rings have both a very high elongation at break and excellent tear resistance. This is also the reason why NBR or HNBR O-rings are used when there is a high mechanical load. <\/span><\/p>\n

Note: <\/b>The FEP\/FKM and PTFE O-rings must be considered separately in this table, as they are not elastomers like the other materials. FEP encapsulated O-rings are a combination product made of thermoplastic (FEP encapsulation) and elastomer (FKM core). PTFE is a duromere.<\/span><\/p>\n


<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"

Elongation at break #1 What is elongation at break? The elongation at break reflects the ability of materials to deform. In the case of O-rings, the elongation at break is determined by means of the world-famous tensile test using a material sample. The sample is clamped in a machine and stretched until it tears. The … Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-24108","page","type-page","status-publish"],"yoast_head":"\nElongation at break | Simply explained | O-RING lexicon<\/title>\n<meta name=\"description\" content=\"Elongation at break of O-rings explained simply \u2705 O-ring lexicon \u2705 O-ring technical terms \u2705 The O-ring supplier \u2705 Click here!\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/nh-oring.de\/en\/elongation-at-break-o-ring-lexicon\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Elongation at break | Simply explained | O-RING lexicon\" \/>\n<meta property=\"og:description\" content=\"Elongation at break of O-rings explained simply \u2705 O-ring lexicon \u2705 O-ring technical terms \u2705 The O-ring supplier \u2705 Click here!\" \/>\n<meta property=\"og:url\" content=\"https:\/\/nh-oring.de\/en\/elongation-at-break-o-ring-lexicon\/\" \/>\n<meta property=\"og:site_name\" content=\"NH O-RING - 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