After 60 years in business, we at Admiral have witnessed industry trends come and go. We have experienced times when mass production has been lauded as the key to efficiency and times when specialization and customization are highly valued, and we are fully aware of the impact that comes with often long cycles of raw material scarcity and oversupply, high prices and then low prices. Once again, we find ourselves in the midst of another longstanding trend that is perhaps reversing its course. Where once globalization and the shape of the world’s economy pushed American companies – manufacturing and service providers alike – to look overseas for lower cost labor, these same trends may now be driving employers to consider the U.S. once again. According to Harold Sirkin, a partner at Boston Consulting Group and one of the co-authors of a recent in-depth study, Made in America – Again, “There’s a pendulum that swings all the time, and now it is swinging back.”
Call it “insourcing,” “onshoring,” or “reshoring”, this relatively recent phenomenon has come to embody a sense of rebirth for American manufacturing. Over the next decade, BCG forecasts that $100 billion in goods production can return to U.S. shores, and that the creation, or re-creation, of hundreds of thousands of jobs will help reduce the unemployment rate by 1.5 percent. Manufacturing has been growing in the U.S. after falling every year since 1998. In fact, the number of manufacturing jobs rose in the U.S. in both 2010 and 2011. Since December 2009, the sector has added 300,000 jobs. Manufacturers added 50,000 people to their payrolls in January 2013 alone, which makes it the biggest monthly increase in a year.
Companies such as Apple, Lenovo, Ford, Honda and Otis Elevator have insourced jobs in recent years. GE opened new assembly lines in Kentucky to begin manufacturing appliances and Wal-Mart has pledged to spend $50 billion in US goods over the next decade. These are just a few examples. What manufacturers are coming to realize is that the offshoring model does not always work in today’s business environment. Where once Asia was a source of cheap, productive labor, US productivity is now 3.4 times higher than it is in China, according to Sirkin, and a more flexible workforce making the US a more cost-efficient option. Manufacturers are finding that onshoring reduces lead times and thus inventory carrying costs, transportations costs (oil prices have tripled since 2000), and the hassle of regulatory red tape. In addition, onshoring reduces the threat of intellectual property theft, and improves quality and consistency. There’s a human cost, too – working conditions at many overseas manufacturing plants are known to be far below American standards, as we witnesses recently with the tragedy in Bangladesh where over 1000 workers died in a building collapse.
However, there are challenges that come with the trend in onshoring. Capital investment in new assembly lines and in training new workers in more current operational skill sets will be required. That’s because manufacturing has changed dramatically since it left American shores in the 1990’s, replacing workers with machines and reducing the number of jobs that people could get right out of high school. And the trend is slow to progress; although many companies are moving manufacturing back to the United States, it is often only a small part of their larger global operations that is coming back.
The metals industry is responding positively to the trend in onshoring. A study conducted by PricewaterhouseCoopers states that chemicals, primary metals and heavy equipment manufacturing industries stand to benefit most from onshoring. According to TD Economics, relatively capital-intensive recently-offshored manufacturing industries – computers and electronics, machinery, fabricated metals, electrical equipment, and plastics and rubber – are likely to lead the onshoring trend. Metal Service Center Institute President and CEO Bob Weidner tells us the future looks bright: “Our industry is gaining strength – jobs are coming back and manufacturers are bringing operations back home to the United States.”
At Admiral, we know the importance of monitoring global trends that affect our industry, shedding light on growth-sustaining opportunities for your business as well as for our own. It’s all part of Admiral Care, going the extra step to deliver you the very best in customer care.
Brass and bronze are two of the most widely used copper alloys in precision manufacturing — and while they're often mentioned in the same breath, they perform very differently in the field. Choosing the right alloy for a given application isn't just about cost or availability; it's about matching the material's properties to the demands of the job.
This guide covers the key differences between brass and bronze, highlights the grades we rely on most at Admiral Metals — including C360's industry-leading machinability, C954's outstanding corrosion resistance, and the growing shift from C360 to C2745 for lead-free applications — and gives you a practical framework for making the right call.
The Fundamental Difference
Both are copper alloys, but the alloying elements define everything:
Brass
Bright golden appearance, excellent machinability, and strong corrosion resistance in everyday environments. The go-to choice for high-volume precision machining.
Bronze
Harder, stronger, and superior in harsh or submerged environments. The specialist alloy for marine, industrial, and heavy-load applications.
Zinc (brass) favors cost, machinability, and electrical conductivity. Tin, aluminum, or silicon (bronze) favors strength, wear resistance, and corrosion performance under demanding conditions.
Key Property Comparison
| Property | Brass | Bronze |
|---|---|---|
| Machinability | ||
| Corrosion Resistance | ||
| Hardness / Wear | ||
| Material Cost | ||
| RoHS / Lead-Free | C360: contains lead · C2745: fully compliant | C954: compliant |
Brass Grades: What You Need to Know
C360 — Free-Cutting Brass: The Machinability Benchmark
C360 — Alloy 360 / Free-Cutting Brass
- Machinability rated at ~100% — the universal benchmark against which all other copper alloys are measured
- Contains ~3% lead, which acts as a built-in chip-breaker and internal lubricant during cutting operations
- Produces short, manageable chips — critical for screw machines and high-speed CNC turning centers
- Dramatically extends tool life and enables faster cycle times versus other copper alloys
- Delivers excellent surface finish with minimal secondary operations required
- Ideal for fittings, valves, fasteners, gears, and general-purpose machined components
- Limitation: Not RoHS compliant — restricted in potable water plumbing, EU-exported products, and medical applications
The lead particles in C360 don't dissolve into the copper matrix — they remain as tiny dispersed inclusions that act as a chip-breaker and internal lubricant at the cutting edge. The result: short, manageable chips instead of the long stringy swarf that plagues other alloys, dramatically reduced tool wear, faster cycle times, and a superior surface finish right off the machine. For high-volume screw machine work or CNC turning, no other copper alloy delivers this combination of speed, finish quality, and cost efficiency.
C2745 — Lead-Free Eco Brass: The Modern Alternative
The traditional choice
~3% lead content · Machinability ~100% · Not RoHS or NSF 61 compliant · Restricted in potable water and EU applications
The lead-free standard
<0.09% lead · Machinability ~70–80% of C360 · Fully RoHS, NSF 61 & California AB 1953 compliant · Drop-in replacement for most machined parts
As regulations around lead in plumbing and potable water systems have tightened — particularly under NSF/ANSI 61, the EU's RoHS directive, and California's AB 1953 (Prop 65 "Lead-Free" standard) — the industry has been steadily migrating away from C360 for these applications. C2745 is the primary engineered replacement: it retains excellent machinability (~70–80% of C360), fits the same stock forms and tolerances, and requires no significant design changes in most cases.
Other Key Brass Grades
C464
- Tin addition significantly improves seawater corrosion resistance over standard brass
- Common in marine hardware, propeller shafts, and condenser tubes
- Good combination of strength and formability
C260
- Exceptional cold-working and deep-draw capability
- Used for ammunition casings, radiator cores, springs, and stampings
- Good corrosion resistance; moderate machinability
Bronze Grades: Strength Where It Counts
C954 — Aluminum Bronze: The Corrosion Resistance Leader
C954 — Alloy 954 / Aluminum Bronze
- Outstanding corrosion resistance — resists seawater, mild acids, and high-temperature oxidation
- Aluminum content (~9–11%) forms a tenacious, self-healing oxide layer similar in principle to stainless steel
- High tensile strength (~85 ksi) combined with excellent wear and erosion resistance
- Preferred for pump impellers, propellers, marine shafting, valves, and chemical plant components
- Inherently corrosion-resistant throughout its cross-section — not dependent on coatings or plating
- Lead-free and fully compliant with environmental regulations
- Well-suited for heavy structural and flow-exposed parts where coating integrity cannot be guaranteed
The aluminum content in C954 creates a dense, tightly adhering aluminum oxide surface layer that reforms instantly if the surface is scratched or abraded — providing robust, self-repairing protection in saltwater, mild acids, and oxidizing atmospheres. Unlike many alloys that rely on surface coatings for corrosion protection, C954 is corrosion-resistant throughout its entire cross-section. This makes it the material of choice for pump components, propeller hubs, marine shafting, and any application where coating integrity cannot be reliably maintained.
Other Key Bronze Grades
C932
- The workhorse bearing bronze — conformable, low friction, embeds contaminants
- Excellent for bushings, washers, and thrust bearings under moderate loads
- Available in oil-impregnated form for self-lubricating applications
C510 / C544
- Phosphorus addition increases hardness and significantly improves fatigue resistance
- Excellent for springs, electrical contacts, and fine wire mesh
- Good corrosion resistance in both fresh and salt water
C651 / C655
- Outstanding weldability — preferred for architectural and artistic fabrication
- Good strength and corrosion resistance
- Used in marine fasteners, bolts, and sculpture
C863
- Very high strength — among the strongest of all copper alloys
- Used for heavy-duty gears, wear plates, and structural hardware
- Good resistance to dezincification in seawater
When to Use Each: A Practical Guide
Choose Brass When…
- High-volume precision machining is the priority (C360 or C2745)
- Electrical or thermal conductivity matters for the design
- Aesthetic / decorative finish is important (warm golden color)
- Cost is a primary constraint on the project
- Mild corrosion environments — air, fresh water, indoor service
- Lead-free compliance is required → specify C2745 or C464
- Plumbing fittings, HVAC components, instrumentation
- Locks, gears, ammunition casings, musical instruments
Choose Bronze When…
- Marine or submerged saltwater exposure is a factor (C954, C464)
- High wear, bearing, or bushing performance is required (C932, C954)
- Elevated temperature or chemical plant service conditions apply
- Heavy structural parts require high tensile strength
- Pump impellers, propellers, shafts, valves in aggressive media
- Springs and electrical contacts needing fatigue resistance (C510)
- Welded assemblies and architectural or artistic work (C655)
- Inherent corrosion resistance is needed throughout the cross-section
Quick Grade Reference
The Bottom Line
Brass and bronze aren't interchangeable — they're complementary. Brass wins on machinability, cost, and everyday corrosion resistance, making it the default choice for precision machined parts in benign environments. Bronze wins in demanding conditions: marine exposure, heavy loads, bearing surfaces, and anywhere a coating simply can't be relied upon.
Within each family, grade selection matters just as much as alloy family. C360 remains the machining benchmark, but C2745 is becoming the responsible default for any application touching potable water or destined for regulated markets. And when corrosion or wear is the design driver, C954 aluminum bronze is in a class of its own among copper alloys.
Not sure which grade is right for your next job? Our team has been matching customers to the right material since 1950 — give us a call or request a quote online.
Ready to Order or Need a Recommendation?
Admiral Metals stocks a full range of brass and bronze alloys in rod, bar, tube, and plate — cut to your exact requirements.