This post contains references to products from one or more of our advertisers. We may receive compensation when you click on links to those products. For an explanation of our Advertising Policy, visit this page.

Over the last few years we’ve seen a dramatic rise in metal credit cards. What used to feel special, like it or not, has become nearly commonplace. You can blame the Chase Sapphire Reserve card for this situation. The marketing campaign was so successful that Chase actually ran out of metal to make the cards. Then, in 2017, American Express re-introduced the Platinum Card® from American Express as a sleek metal card. And not to be left out, Citibank followed by turning the Citi Prestige into a metal alloy card. And those are just a few examples of the new, non-plastic generation of cards.

The market today has more than a dozen metal cards at last count, with Amex more recently rebranding its Premier Rewards Gold product as the American Express® Gold Card and giving it a nice metal facelift too. More are likely to emerge (the first came from American Express in the form of a Centurion card made of titanium in 1999), but there are differences among cards. You can feel when a product is relatively heavy (like the Ritz-Carlton Rewards Credit Card) and thick. Or when the metal is so thin and malleable that you aren’t even sure if it’s metal (like the Citi Prestige metal cards when we first got them).

After some investigation, we discovered that metal credit-card bending is a science. In fact, there is a machine specifically made for gauging credit card sturdiness. It is the aptly named “Bending Stiffness Gauge” manufactured by Cardmatix, a company with offices in California and China. Cardmatix describes the $525 device as follows:

This fixture is designed to hold a test card in a cantilevered position. Card placement is a snap with a large tensioning knob. Once clamped in the test position, a stainless steel weight – calibrated to apply a force of 0,7N – is applied on the opposite edge of the card body. The resulting deformation is measured using the integrated ruler. It is crafted from aircraft grade 6061 aluminum alloy bar stock and electrostatically coated for a durable long-lasting finish. Fittings and test weights are made of stainless steel.

To test a card, you stick one end into the device, twist the top to fasten the card into place, and then attach the provided weight at the other end of the card. The metal block weighs 2.5 ounces. Once everything is set up, you attach a ruler to the side and measure the distance between the weight and the bottom of the machine. It looks like this:

We got our hands on one of these devices and tested as many metal cards as we could find. The lower the number in the bend column, the stronger the card is.

Here’s how the different cards stack up against each other in our tests. This includes the bend as well as the weight.

 Credit Card Bend (centimeters) Weight (Ounces)
American Express Platinum Card 0.3 0.7
The Business Platinum® Card from American Express 0.3  0.7
American Express Business Centurion Card 0.4 0.5
Ritz-Carlton Rewards Card 0.4  1
American Express Gold Card 0.5 0.6
JP Morgan Palladium Card 0.5 1
Mastercard Black Card 0.5 0.7
 U.S. Bank Altitude Reserve 0.7  0.6
Capital One Venture Rewards Credit Card 0.8 0.6
Chase Sapphire Reserve 1.1  0.5
Chase Sapphire Preferred Card 1.2 0.5
Citi Prestige 1.2 0.4

And the Winner Is …

The strongest (least bendy) card is a tie between the Amex Platinum and Amex Business Platinum, which makes sense considering they use the same materials. Second place was a tie between the Amex Business Centurion and the Ritz-Carlton Rewards Card, each of which came in just 0.1 centimeters behind the Platinum family. While the American Express Gold Card came in right after, bending just 0.1 centimeters more than the Ritz and Centurion card.

The Chase Sapphire Preferred and Citi Prestige tied for last place with 1.2 centimeters in bend; both are lighter than their heavy metal counterparts as well (0.5 and 0.4 ounces, respectively).  

The award for heaviest card actually goes to two cards: the Ritz-Carlton Rewards Card (which has been closed for applications) and the JP Morgan Palladium Card (recently converted to the J.P. Morgan Reserve) both held their own in the strength tests, weighing in at 1 ounce a piece.

You can get a better sense of how weak some cards are by looking at them in profile as they are being tested. Below is the Chase Sapphire Preferred — which is very flexible.


And the strongest, The Amex Platinum:

Does heft really have any impact on the credit card market? Does it change which card you whip out after a meal? Once upon a time, a thicker, stronger card may have been the status symbol — sturdy being more impressive than thin and wimpy. But we also realize that wallets are getting heavier with all of these metal cards. So maybe more bendability is actually preferred by some consumers. Let us know how you feel in the comments below.

All images by the author.

Know before you go.

News and deals straight to your inbox every day.

American Express® Gold Card

With some great bonus categories, the American Express Gold Card has a lot going for it. The card offers 4x points at US restaurants, at US supermarkets (up to $25,000; then 1x), and 3x points on flights booked directly with airlines or through It is currently offering a welcome bonus of 35,000 bonus points after you spend $2,000 in the first three months.

Apply Now
More Things to Know
  • Earn 35,000 Membership Rewards® Points after you spend $2,000 on eligible purchases with your new Card within the first 3 months.
  • Earn 4X Membership Rewards® points at U.S. restaurants. Earn 4X Membership Rewards® points at U.S. supermarkets (on up to $25,000 per year in purchases, then 1X).
  • Earn 3X Membership Rewards® points on flights booked directly with airlines or on
  • Earn up to $10 in statement credits monthly when you pay with The Gold Card at Grubhub, Seamless, The Cheesecake Factory, Shake Shack, and Ruth's Chris Steak House. This is an annual savings of up to $120. Enrollment required.
  • $100 Airline Fee Credit: up to $100 in statement credits per calendar year for incidental fees at one selected qualifying airline.
  • Choose to carry a balance with interest on eligible charges of $100 or more.
  • No Foreign Transaction Fees.
  • Annual Fee is $250.
  • Terms apply.
  • See Rates & Fees
Intro APR on Purchases
Regular APR
See Rates & Fees
Annual Fee
Balance Transfer Fee
See Terms
Recommended Credit
Terms and restrictions apply. See rates & fees.

Editorial Disclaimer: Opinions expressed here are the author’s alone, not those of any bank, credit card issuer, airlines or hotel chain, and have not been reviewed, approved or otherwise endorsed by any of these entities.

Disclaimer: The responses below are not provided or commissioned by the bank advertiser. Responses have not been reviewed, approved or otherwise endorsed by the bank advertiser. It is not the bank advertiser’s responsibility to ensure all posts and/or questions are answered.