Implant-Grade vs. Surgical Steel vs. Sterling Silver: What’s Actually Safe to Wear in Your Body

The jewelry industry uses the word ‘safe’ very loosely. ‘Hypoallergenic.’ ‘Nickel-free.’ ‘Surgical grade.’ ‘Body safe.’ These terms appear on packaging, in product listings, and in studio showcases—sometimes accurately, sometimes not, and often without any defined standard behind them.

When it comes to body piercing jewelry, what’s in the metal is not an aesthetic question. It’s a medical one. The wrong material in a healing piercing will cause problems—chronic irritation, allergic response, migration, delayed healing—and in some cases it will cause problems in a healed piercing too. Your body is in contact with this metal continuously, in a wound channel, in proximity to your bloodstream. The standards that apply here are not the same as the standards for earrings you wear occasionally with intact lobes.

Here is the actual breakdown.

The Gold Standard: Implant-Grade Titanium (ASTM F136)

Implant-grade titanium meeting ASTM F136 is the material we recommend for all initial piercings at House of GRIM. This is not a preference or a upsell. It is the material with the best documented safety profile for internal use in the human body.

ASTM F136 is the specification used for titanium in surgical implants—joint replacements, bone screws, surgical plates. It has a defined and regulated composition, a defined nickel content ceiling (0.05%), and an established track record in medical use. When a piece of jewelry is described as ASTM F136 titanium from a reputable supplier, you know what you’re getting.

Why titanium specifically

• It is biocompatible—the body does not react to it as a foreign substance the way it does to many other metals

• It contains no free nickel at meaningful levels, making it appropriate for people with nickel sensitivities

• It is lightweight, which reduces pressure and movement on healing tissue

• The color in anodized titanium is produced by an oxide layer—an electrical process, not dye or coating. The color is part of the metal and does not leach into tissue

• It is non-porous, meaning bacteria cannot embed in the surface

What ‘titanium’ doesn’t always mean

Not all jewelry marketed as titanium is implant-grade. ‘Titanium-plated,’ ‘titanium-coated,’ or simply ‘titanium’ without an ASTM specification can refer to jewelry with a thin titanium coating over a base metal—which will eventually wear through and expose whatever is underneath. Always ask for ASTM F136 specifically, from a supplier your studio can verify.

Implant-Grade Steel (ASTM F138)

Implant-grade steel meeting ASTM F138 is the other medically specified option for body jewelry. It is the same specification used for surgical instruments and some implants, and it is a legitimate choice for many people—with one important caveat.

Implant-grade steel contains nickel. The ASTM F138 specification caps nickel content and requires that it be tightly bound within the alloy—meaning it should not leach freely—but it is present. For the majority of people, this is not a problem. For people with nickel sensitivities or nickel allergies, it can be.

Nickel sensitivity is significantly more common than most people realize, affects more women than men, and is frequently undiagnosed—many people have a sensitivity they’ve never identified because they’ve never been tested. If you’ve had consistent irritation with piercing jewelry across multiple piercings over your lifetime, nickel sensitivity is worth investigating.

If your skin history is uncomplicated, ASTM F138 steel is a reasonable option for initial piercings. If you have any history of metal sensitivity or persistent healing problems, implant-grade titanium is the better starting point.

Solid Gold (14k or Higher, Nickel-Free)

Solid, nickel-free gold at 14k or higher is appropriate for both healing and healed piercings and is an excellent choice for jewelry you intend to wear long-term. High-karat gold is biocompatible, does not corrode, and is genuinely body-safe when it is what it claims to be.

The operative words: solid, nickel-free, and 14k minimum. Here’s what each of those means and why they matter:

• Solid: Gold-plated jewelry has a base metal core with a thin gold coating. That coating wears off—especially in a wet, warm environment like a piercing channel. Once it wears, whatever the base metal is (often brass or copper) is directly in contact with your tissue. Gold-filled is better than gold-plated but still not solid. Only solid gold maintains its composition throughout.

• Nickel-free: Some gold alloys use nickel as a hardening agent. White gold in particular is frequently nickel-alloyed. Always confirm the alloy composition and verify it is nickel-free.

• 14k minimum: Karat indicates the proportion of pure gold. 24k is pure gold (too soft for jewelry). 14k is 58.5% gold, 18k is 75%. The remaining percentage is the alloy metals. Lower karat gold has more alloy and more potential for reactivity. 14k is the accepted floor for body jewelry.

Niobium

Niobium is an underappreciated option that belongs in any honest conversation about body-safe metals. It is biologically inert, contains no nickel, and can be anodized in the same range of colors as titanium. It is slightly denser than titanium, which some people notice and some don’t. For clients who want color options without any nickel exposure and for whom titanium is not available in the configuration they want, niobium is a legitimate alternative.

The Problem Metals

Sterling silver

Sterling silver is 92.5% silver and 7.5% other metals—usually copper. Silver oxidizes. In a dry environment, that oxidation produces the pleasing dark patina that antique silver has. In the warm, wet, fluid environment of a piercing channel, that oxidation produces silver compounds that are cytotoxic—toxic to cells. Sterling silver in a healing piercing causes chronic irritation and delays healing. It is not a body-safe metal for fresh or healing piercings.

In healed, fully stable piercings with clean, sealed channels, some people wear sterling silver without problems—particularly in surface-level lobe piercings that have been healed for years. But it is not a safe choice for healing tissue, and it is not a choice we carry for initial piercings.

‘Surgical steel’ without a specification

‘Surgical steel’ is a marketing term, not a material standard. It can refer to any number of steel alloys, with varying nickel content and varying corrosion resistance. Without an ASTM F138 specification—and without being able to verify that specification from a reputable supplier—there is no way to know what you’re actually getting. Much of the jewelry labeled ‘surgical steel’ on Amazon, at mall kiosks, and in pharmacy displays is not ASTM F138. Some of it is 316L steel, which is the next tier down—used in cookware and watches, not surgical implants—and which has higher free nickel levels.

The phrase ‘surgical steel’ is frequently applied to jewelry to imply safety without any standard behind it. Ask for the specification. If the answer is just ‘surgical steel,’ that’s not an answer.

Brass, copper, and mystery metals

Brass and copper are both common base metals in fashion jewelry and both are reactive in tissue. Copper causes green skin discoloration (the copper oxidizing against your body’s chemistry). Brass contains zinc and often lead. Neither belongs in a piercing. The issue is that these metals are frequently hiding under a coating of gold, silver, rhodium, or titanium—and once that coating wears, the base metal is what your tissue is in contact with.

Acrylic, silicone, and plastics

Acrylic is porous, meaning bacteria can colonize the surface. It is not appropriate for healing piercings and is used primarily in stretched piercings once they are fully healed and stable. Implant-grade silicone has legitimate uses in stretched lobes but should not be used in initial piercings. ‘Body-safe plastic’ from unverified sources is a category we treat with significant skepticism.

How to Know What You’re Actually Buying

If you’re purchasing jewelry from a studio: ask what specification the metal meets, who their supplier is, and whether the supplier’s materials are implant-grade verified. A reputable studio should be able to answer all three.

If you’re purchasing online: APP-member studios and suppliers like Anatometal, BVLA, Industrial Strength, and Neometal are established names in implant-grade body jewelry. These are not the cheapest options, but they are the verifiable ones.

If you’re not sure whether jewelry you already own is body-safe: bring it in. We’ll look at it and tell you what we think.

At House of GRIM, we carry implant-grade titanium and solid gold from verified suppliers. If you’re having a healing problem and you think your jewelry might be part of the reason, a jewelry swap is often the fastest fix. Book a piercing check-in at 196 Parkdale Ave N, Hamilton.