C10100 Oxygen-Free Copper Busbar

Gnee Steel (Tianjin) Co., Ltd. is one of the most professional manufacturers and suppliers of c10100 oxygen-free copper busbar in China, specialized in providing high quality copper products with competitive price. Welcome to buy discount c10100 oxygen-free copper busbar for sale here from our factory. Customized orders are welcome.

 

C10100 OFE (Oxygen-Free Electronic) copper busbar is a high-purity copper conductor with 99.99% copper content and maximum oxygen content of 0.0005% (5 ppm). It is manufactured under controlled atmosphere to prevent oxygen absorption during melting and casting.

 

Parameter	Value
Material Grade	C10100 (OFE) / Cu-OFE
Purity	≥99.99%
Oxygen Content	≤0.0005% (5 ppm max)
Conductivity	100% IACS (≥58 MS/m)
Standards	ASTM B187, ISO 5182, DIN 40500
Temper	Half-hard (H02) or Annealed (O)

Standard C11000 ETP copper contains 0.02-0.04% oxygen. For vacuum systems, hydrogen brazing, and cryogenic equipment, oxygen causes failures. C10100 eliminates these risks.

 

The current carrying capacity of C10100 busbar is identical to C11000 (both 100% IACS). The table below shows ampacity under standard conditions (35°C ambient, 65°C max, AC 50/60Hz).

 

Ampacity of C10100 Flat Copper Busbar

Width (mm)	Thickness (mm)	Cross-section (mm²)	Current (Amps)
20	5	100	250 A
25	6	150	350 A
30	6	180	410 A
40	6	240	520 A
50	6	300	620 A
60	10	600	1050 A
80	10	800	1350 A
100	10	1000	1600 A

This ampacity table is based on ASTM B187 for current carrying capacity of C10100 busbar at 35°C ambient. For higher temperatures, apply derating factors (0.88 at 45°C, 0.76 at 55°C).

 

Standard Dimensions for C10100 OFE Copper Busbar

Width (mm)	Thickness (mm)	Standard Length (mm)
20	3, 5, 6	2000 / 4000
25	3, 5, 6	2000 / 4000
30	5, 6, 10	2000 / 4000
40	5, 6, 10	2000 / 4000
50	5, 6, 10	2000 / 4000
60	6, 10, 15	2000 / 4000
80	6, 10, 15	2000 / 4000
100	10, 15, 20	2000 / 4000

C10100 copper busbar standard sizes comply with ASTM B187. Custom widths (10mm to 220mm), thicknesses (3mm to 30mm), and lengths (up to 6000mm) available with MOQ 50 pieces.

 

Property	C10100 (OFE)	C11000 (ETP)
Purity	≥99.99%	≥99.90%
Oxygen Content	≤0.0005% (5 ppm)	0.02-0.04% (200-400 ppm)
Conductivity (% IACS)	100%	100%
Hydrogen embrittlement risk	None	High (if heated in hydrogen)
Outgassing in vacuum	Very low	Moderate
Price	Higher (+30-50%)	Lower (baseline)
Best for	Vacuum, hydrogen, cryogenic, high-frequency	General switchgear, panels, grounding

This oxygen-free vs ETP copper busbar comparison shows that for 95% of applications, C11000 is sufficient. Only choose C10100 if your application involves vacuum chambers, hydrogen brazing, cryogenic temperatures, or high-frequency signals.

 

1. Vacuum systems (below 10⁻⁵ torr)
Standard ETP copper outgasses under vacuum. C10100 has extremely low outgassing – used in semiconductor equipment, electron microscopes, particle accelerators.

 

2. Hydrogen brazing and annealing
Above 400°C in hydrogen, oxygen in standard copper forms steam (H₂O) causing hydrogen embrittlement – internal cracks. C10100 has no oxygen – no embrittlement.

 

3. Cryogenic systems (below -150°C)
C10100 maintains ductility and thermal conductivity down to 4K (-269°C). Used in MRI magnets, superconducting systems, LNG equipment.

 

4. High-frequency and RF applications
Used in waveguides, RF connectors, radar systems where consistent electrical properties at GHz frequencies matter.

 

Send your application details, we will recommend C10100 or C11000 for your project.

Free consultation

Tin plating and silver plating for C10100 busbar are available to enhance corrosion resistance and contact performance.

Plating Options for C10100 OFE Copper

Plating Type	Thickness	Key Benefit	Best For
Tin plating	3-8 microns	Low cost, corrosion resistance	Switchgear, grounding
Silver plating	5-15 microns	Lowest contact resistance	High-frequency, RF, EV connectors
Heat shrink tubing	1.5x - 3x ratio	Insulation, color coding, touch-proof	Insulated busbar systems

For vacuum feedthroughs and RF applications, silver plating is strongly recommended. For cryogenic applications, tin plating may crack – use silver or leave bare.

 

Every batch of C10100 must pass hydrogen embrittlement test for OFE copper (ASTM B577).

 

Test method：

Sample heated to 400-450°C in hydrogen atmosphere for 30 minutes

Cooled and inspected under microscope

Pass / fail criteria：

Pass (C10100)： No cracks, no blisters

Fail (C11000 substitute)： Visible cracks or blisters

 

Standard Tests for C10100 Busbar

Test	Standard	Requirement
Oxygen content	ASTM E1019	≤0.0005% (5 ppm)
Hydrogen embrittlement	ASTM B577	No cracks or blisters
Conductivity	ASTM E1004	≥100% IACS (58 MS/m)
Outgassing rate	Custom	< 1×10⁻⁸ Torr·L/s/cm²

Hydrogen embrittlement test for OFE copper is the most critical test to distinguish genuine C10100 from C11000. We provide mill test certificates (MTC) with every shipment.

 

Stamping and bending for C10100 copper busbar require the same CNC capabilities as C11000.

Custom Fabrication Capabilities

Process	Tolerance	Maximum
CNC punching (holes)	±0.1mm	Thickness ≤10mm
Slotted holes	±0.15mm	6x12mm to 10x25mm
Bending	±1°	Length ≤600mm
Shearing (cut to length)	±0.5mm	Width ≤220mm

Stamping and bending for C10100 copper busbar follows same design rules as C11000. Plating is applied after fabrication to ensure plated hole walls.

 

Layer	Material	Purpose
Inner wrap	VCI film	Prevents oxidation
Interleaving	Kraft paper + foam	Prevents scratching
Bundling	Steel straps on plywood pallet	Secure for sea freight
Container	20GP or 40HQ	Max 24 pallets per 20GP

Anti-oxidation packaging for oxygen-free copper includes VCI film because C10100's bare surface is more reactive than C11000. For long-term storage (>6 months), we recommend vacuum sealing.*

 

Q1：What is the minimum order quantity (MOQ) for C10100 copper busbar?

For standard sizes (width and thickness from our die library)：MOQ = 10 pieces per size.

For custom sizes (special width, thickness, or length not in standard list)：MOQ = 50 pieces per size.

For sample orders (any size, any shape)：No MOQ. We support small-batch prototype orders before mass production.

Standard sizes include：20mm, 25mm, 30mm, 40mm, 50mm, 60mm, 80mm, 100mm width with 3mm, 5mm, 6mm, 10mm thickness.

 

Q2：Do you provide samples of C10100 busbar? What is the sample policy?

Yes, we provide samples for all C10100 busbar products.

Sample Type	Cost	Shipping	Lead Time
Standard size (from stock)	Free	Customer pays	5-7 business days
Custom size (with holes or bends)	50 USD	Customer pays	7-10 business days

 

Q3：C10100 vs C11000 – which one should I choose for my project?

This is the most common question. Here is a simple decision guide：

If your application involves...	Recommended grade
Standard switchgear, panel boards, or grounding	C11000 (ETP copper) – lower cost, sufficient
Vacuum chamber or vacuum feedthrough (below 10⁻⁵ torr)	C10100 (OFE copper) – low outgassing
Hydrogen brazing or annealing (heating in H₂ atmosphere)	C10100 – no hydrogen embrittlement
Cryogenic system (below -150°C / 123K)	C10100 – maintains ductility
High-frequency RF or waveguide (GHz range)	C10100 – consistent electrical properties
Your customer spec explicitly says "oxygen-free"	C10100 – do not substitute C11000
You are not sure	C11000 – 95% of applications use ETP copper

Still not sure? Send us your application details (current, temperature, environment, any special processes like brazing). We will recommend the right grade – free consultation.

 

Q4：Can you punch holes, add slots, or bend C10100 copper busbar?

Service	Tolerance	Maximum capability
Round hole punching	±0.1mm	Diameter 4mm to 20mm, thickness ≤10mm
Slotted hole punching	±0.15mm	6mm x 12mm up to 10mm x 25mm
Counterbored holes	±0.1mm	Custom sizes available
Bending (L-shape, Z-shape, U-shape)	±1°	Maximum bending length 600mm
Cut to exact length	±0.5mm	Up to 6000mm long

Send your drawing in PDF, DWG, or DXF format. We will review and send CAD confirmation within 24 hours.

 

Q5：What test reports and certifications do you provide for C10100 busbar?

Every shipment includes：

Document	Content
Mill Test Certificate (MTC)	Oxygen content (ASTM E1019), conductivity (% IACS), hardness, dimensions, batch number
Certificate of Compliance	Confirms material meets ASTM B187 or customer-specified standard
Packing list	Quantity, dimensions, plating type per package

 

Q6：What is the production lead time for C10100 busbar orders?

Order Type	Lead Time (business days)
Sample – standard size, no plating	5-7 days
Sample – standard size with tin/silver plating	7-10 days
Sample – custom size with holes or bends	7-10 days
Production order – standard size, no plating (MOQ 10 pcs)	10-15 days
Production order – standard size with plating (MOQ 10 pcs)	15-20 days
Production order – custom size with fabrication (MOQ 50 pcs)	15-20 days

 

Q7：Sea freight vs air freight for C10100 busbars – what are the cost and time differences?

Shipping Method	Delivery Time	Cost (approx.)	Best For
Sea freight – LCL (less than container)	30-40 days	Baseline	Orders 100-500 kg
Sea freight – 20FT FCL (full container)	25-35 days	Lower per kg	Orders > 18 tons
Air freight	5-7 days	3-5x sea freight	Urgent orders, 100-1000 kg
Express courier (DHL / FedEx / UPS)	3-5 days	5-8x sea freight	Samples only, orders < 100 kg

 

Example for a 200 kg C10100 busbar order shipping to USA：

Method	Cost (approx.)	Time
Sea freight (LCL)	400-600 USD	35-40 days
Air freight	1,800-2,500 USD	5-7 days
DHL Express	3,000-4,000 USD	3-5 days

 

Q8：Is C10100 suitable for vacuum chambers and cryogenic equipment?

Yes. C10100 is the industry standard for both applications.

For vacuum (below 10⁻⁵ torr)：

C10100 has very low outgassing rate (< 1×10⁻⁸ Torr·L/s/cm²)

No volatile impurities that contaminate vacuum environment

Used in：Semiconductor PVD/CVD chambers, electron microscopes, particle accelerators, UHV systems

 

For cryogenic (down to 4K / -269°C)：

C10100 maintains ductility – does not become brittle like some alloys

Thermal conductivity remains high – critical for cooling

Used in：MRI magnets, superconducting magnet busbars, LNG systems, space cryocoolers

 

For cryogenic applications, we recommend bare (no tin plating) or silver plating. Tin plating may crack at cryogenic temperatures.

 

Q9：What is the maximum length for oxygen-free copper busbar?

Type	Maximum Length	MOQ Required
Standard (no custom tooling)	4,000 mm	No MOQ for standard
Custom longer length (up to 6,000 mm)	6,000 mm	50 pieces
Longer than 6,000 mm	Not available	Use splice kit or multiple pieces

 

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