{"id":577,"date":"2026-10-09T08:11:16","date_gmt":"2026-10-09T00:11:16","guid":{"rendered":"http:\/\/www.shestartsafrica.com\/blog\/?p=577"},"modified":"2026-10-09T08:11:16","modified_gmt":"2026-10-09T00:11:16","slug":"how-to-test-the-strength-of-a-rivet-40b2-47a1d9","status":"publish","type":"post","link":"http:\/\/www.shestartsafrica.com\/blog\/2026\/10\/09\/how-to-test-the-strength-of-a-rivet-40b2-47a1d9\/","title":{"rendered":"How to test the strength of a rivet?"},"content":{"rendered":"

Hey there, Rivet<\/a><\/p>\n

<\/p>\n

So, if you\u2019re here, you\u2019re probably either a fellow fabrication shop owner, a maintenance tech trying to figure out why that last batch of rivets failed on your bridge bracket, or maybe even someone who\u2019s just curious how we make sure those little metal pins holding everything together actually work. Full transparency \u2013 I\u2019m the head of quality control here at our rivet supply shop, and over the past 12 years, I\u2019ve tested more rivets than I can count. Some days, I swear I can tell a dud from a good one just by holding it (don\u2019t tell my team I said that \u2013 they\u2019ll make me prove it every time), but that\u2019s just a party trick. The real way to test rivet strength? It\u2019s science, but not the stuff that makes you cry during chemistry exams. Let\u2019s break it down like we\u2019re chatting over coffee after a long day of installs.<\/p>\n

First off, let\u2019s get one thing straight: not all rivets are made the same, and they\u2019re not all tested the same way either. A rivet holding a tiny jewelry clasp? It doesn\u2019t need the same strength as one holding a steel beam on a skyscraper. Our shop supplies everything from small pop rivets for HVAC ductwork to heavy-duty structural rivets for bridges, so we tailor our tests to what the rivet\u2019s actually going to do. That\u2019s the mistake a lot of new guys make \u2013 they use a one-test-fits-all approach, and end up with either rivets that\u2019re way too flimsy or way too expensive for the job.<\/p>\n

Let\u2019s start with the most common test we do here, and probably the one you\u2019ve heard of if you\u2019ve ever worked with metal: the tensile shear test. Wait, before you zone out \u2013 tensile shear just means we\u2019re pulling the rivet in two different directions until it breaks, right? No fancy jargon, I promise. Here\u2019s how we do it step by step, no lab coat required (though we do wear safety glasses \u2013 hard hats too, if we\u2019re testing heavy rivets). First, we take 10 randomly selected rivets from every batch that leaves our shop. Why 10? Because if 9 out of 10 are solid, that\u2019s a good batch \u2013 if more than 1\u2019s off, we flag it for a redo. We cut each rivet to a standard length (usually whatever\u2019s used for the most common application, so we get real-world results) and mount it between two steel plates. The plates have a hole the exact size of the rivet, so when we pull them, the rivet\u2019s got to hold both plates together without slipping or breaking.<\/p>\n

We use a hydraulic press for this \u2013 it\u2019s just a big machine that applies slow, steady pressure (we never yank fast, that messes with results) until the rivet snaps or pulls out of the plates. For small pop rivets, that pressure might be 500 pounds; for structural ones? We\u2019re talking 50,000 pounds or more. Last month, we tested a batch of 3\/4-inch steel rivets for a highway overpass project \u2013 one of them broke at 62,000 pounds, which was just under our 65,000-pound threshold. We sent that whole batch back, no questions asked. Our client was frustrated at first, but when we showed them the test data and gave them a new batch that hit 68,000 pounds, they thanked us later. Turns out, cutting corners on testing costs way more than waiting an extra day for good rivets.<\/p>\n

But tensile shear isn\u2019t the only test we run. Sometimes, we do a block shear test, which is basically the same idea but we\u2019re testing the rivet\u2019s ability to hold two chunks of metal that get sheared apart, not just two flat plates. This is super important for rivets used in heavy machinery or trailer frames \u2013 those places get yanked and twisted all the time, not just pulled straight. Last year, we had a client who was using our rivets for their semi-trailer cross members. Their initial tests were all great on tensile shear, but when we did block shear, a couple rivets started bending at 40,000 pounds. Turns out, their cross members were getting pulled at an angle, not straight, so our standard tensile test didn\u2019t catch the weakness. We adjusted their order to a higher-grade alloy rivet, and they haven\u2019t had a rivet failure since. That\u2019s the stuff that keeps us in business \u2013 fixing problems before the client even knows they have them.<\/p>\n

Now, here\u2019s a test that a lot of small shops skip, but it\u2019s super important for making sure rivets don\u2019t just break, but hold their shape when they\u2019re installed: the hardness test. Wait, hardness isn\u2019t the same as strength, right? Yeah, that\u2019s a common mix-up. A rivet can be hard but brittle, which means it\u2019ll snap under pressure instead of bending a little to take the load. That\u2019s a disaster in places where there\u2019s vibration \u2013 like on wind turbine blades or train tracks. We use a portable hardness tester here \u2013 it\u2019s like a tiny gun that presses a diamond tip into the rivet\u2019s head and measures how much it dents. For most structural rivets, we want a hardness of 25-35 HRC (that\u2019s hardness rating, for anyone who cares). If it\u2019s below 25, it\u2019s too soft and might bend when you set it; above 35, it\u2019s too hard and could crack if there\u2019s any movement. Last quarter, we had a batch of stainless steel rivets that came in at 38 HRC. Our team flagged \u2019em immediately \u2013 those would\u2019ve snapped on a construction site within a month. The supplier thought hardness was just a number, but we know it\u2019s what makes the rivet reliable in the real world.<\/p>\n

We also do a impact test sometimes, though not for every batch. That\u2019s where we take a finished rivet and whack it with a big hammer (or an impact testing machine, if we\u2019re being fancy) and see if it cracks. For rivets that get set by hand \u2013 like in aircraft repairs or custom metalwork \u2013 this is key. If you hit a rivet too hard when setting it, it shouldn\u2019t shatter. A few years back, a custom aircraft builder ordered a batch of 1\/8-inch aluminum rivets. Their initial tests passed tensile, but when we did the impact test, 2 out of 15 cracked when we tapped them with a rivet gun. Turns out, the alloy they used was too thin, so it couldn\u2019t handle the force of being set. We swapped them for a slightly thicker grade, and they\u2019ve been a repeat client ever since.<\/p>\n

Wait, let\u2019s talk about the testing we do on-site, not just in our shop. Because a rivet that passes our lab tests is great, but we need to make sure it works when someone\u2019s actually installing it. For example, when we ship heavy structural rivets, we include a set of instructions for setting them with a hydraulic rivet gun \u2013 not a pneumatic one, because too much air pressure can mess up the rivet\u2019s strength. We also offer on-site testing for our big clients \u2013 like when we supplied rivets for a new stadium downtown, we sent a team to help them test a sample section before the main install. They set 10 test rivets and pulled on the beam with a winch, and none of them budged an inch. That gave everyone peace of mind, and the project\u2019s been going smoothly for two years now.<\/p>\n

Here\u2019s something a lot of people don\u2019t know: we also test for corrosion resistance, even though that\u2019s not exactly \u201cstrength\u201d \u2013 but a rivet that rusts through in 6 months is useless, right? We do a salt spray test, where we spray the rivet with a salt water solution for 1000 hours and check for rust. For our marine-grade rivets, that\u2019s non-negotiable. Last year, a boat builder came to us complaining that their old rivets were rusting out after one season. We tested their old rivets \u2013 their salt spray test only lasted 200 hours before rust spots showed up \u2013 and sent them our marine-grade aluminum rivets, which hit 1200 hours with no rust. They\u2019ve now switched all their suppliers to us for every new boat they build.<\/p>\n

Now, let\u2019s get real about what \u201cstrength\u201d actually means here. It\u2019s not just about how much weight a rivet can hold in a lab. It\u2019s about how it performs over time. A rivet that passes all our tests might still fail if it\u2019s used for the wrong job. For example, don\u2019t use a small pop rivet meant for a mail box on a bridge. That\u2019s why we always ask our clients about their specific application when they order \u2013 it\u2019s not one-size-fits-all. We\u2019ve had guys try to save a buck by ordering the cheapest rivets for a heavy-duty job, and they come back to us a month later with a mess of broken rivets and a lot of explaining to do. Our advice is always: tell us what you\u2019re doing, we\u2019ll tell you exactly what rivet you need, and we\u2019ll test it to make sure it works.<\/p>\n

I should also mention that we don\u2019t just test our own rivets \u2013 we\u2019ll test rivets from other suppliers for clients too. A lot of times, shops get stuck with a batch of rivets that they\u2019re not sure about, and they bring \u2019em to us to run the tests. Last month, a small fabrication shop in town brought us a box of rivets they\u2019d ordered online from a \u201cdiscount supplier\u201d \u2013 they were supposed to be structural grade, but our tests showed they were 20% weaker than they claimed. We ended up selling them the correct grade from us for less than it would\u2019ve cost them to rework their entire project, and they\u2019re now a regular customer. That\u2019s the thing about our shop \u2013 we\u2019re not just here to sell rivets, we\u2019re here to make sure our clients\u2019 jobs don\u2019t fall apart (literally).<\/p>\n

So, what\u2019s the takeaway here? Testing rivet strength isn\u2019t just pulling on it until it breaks. It\u2019s a combination of tensile shear, block shear, hardness, impact, and even corrosion testing, all tailored to what the rivet\u2019s actually going to be used for. It\u2019s not complicated, but it needs to be done right, with real data, not just guesswork. At our shop, that\u2019s what we do every single day. We don\u2019t cut corners, we don\u2019t sell rivets that haven\u2019t been tested, and we\u2019ll always help you figure out exactly what you need, whether you\u2019re a small hobbyist or a big construction company.<\/p>\n

<\/p>\n

If you\u2019re in the market for reliable, tested rivets, or you\u2019ve got a batch you\u2019re not sure about and want us to run some tests, hit us up. We\u2019re here to answer questions, send over test data for any batch, and make sure whatever project you\u2019re working on is solid. No fancy sales talk, just good rivets and real results. Let\u2019s connect and get your job done right.<\/p>\n

High Voltage DC Contactor AJH Series<\/a> References:<\/p>\n

    \n
  1. American Society of Mechanical Engineers (ASME) B18.1.1 – Steel Rivets for General Applications<\/li>\n
  2. ASTM E8\/E8M – Standard Test Methods for Tension Testing of Metallic Materials<\/li>\n
  3. ASTM A370 – Standard Test Methods and Definitions for Mechanical Testing of Steel Products<\/li>\n
  4. Metal Supermarkets – Guide to Rivet Testing and Selection for Structural Applications<\/li>\n<\/ol>\n
    \n

    Zhejiang Aokai Electric Co., Ltd.<\/a>
    Zhejiang Aokai Electric Co., Ltd. is your best source for the high quality rivet with CE certification. We have been one of the largest rivet manufacturers and suppliers in China since our establishment in 2008. Welcome to contact our factory for the products.
    Address: No.166 Xiangbai Road, Huxi Industrial, Yueqing, China.
    E-mail: akcontactor@aokai.com
    WebSite:     https:\/\/www.ak-contactor.com\/<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

    Hey there, Rivet So, if you\u2019re here, you\u2019re probably either a fellow fabrication shop owner, a … How to test the strength of a rivet?<\/span>Read more<\/a><\/p>\n","protected":false},"author":48,"featured_media":577,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[540],"class_list":["post-577","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industry","tag-rivet-4c6c-47db65"],"_links":{"self":[{"href":"http:\/\/www.shestartsafrica.com\/blog\/wp-json\/wp\/v2\/posts\/577","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.shestartsafrica.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.shestartsafrica.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.shestartsafrica.com\/blog\/wp-json\/wp\/v2\/users\/48"}],"replies":[{"embeddable":true,"href":"http:\/\/www.shestartsafrica.com\/blog\/wp-json\/wp\/v2\/comments?post=577"}],"version-history":[{"count":0,"href":"http:\/\/www.shestartsafrica.com\/blog\/wp-json\/wp\/v2\/posts\/577\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/www.shestartsafrica.com\/blog\/wp-json\/wp\/v2\/posts\/577"}],"wp:attachment":[{"href":"http:\/\/www.shestartsafrica.com\/blog\/wp-json\/wp\/v2\/media?parent=577"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.shestartsafrica.com\/blog\/wp-json\/wp\/v2\/categories?post=577"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.shestartsafrica.com\/blog\/wp-json\/wp\/v2\/tags?post=577"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}