C68700 Aluminum Brass Tube Price: 7 Factors That Determine Cost

ASTM B111 C68700 aluminum brass tube price ranges from $8 to $25 per kilogram, depending on size, temper, quantity, and surface treatment. For a typical 25mm OD x 2.0mm wall tube, buyers pay $12-18 per kg from GNEE (China). This guide breaks down pricing factors and shows how to reduce purchase cost without sacrificing quality.

Small diameter tubes (OD 6-15 mm) cost more per kg than standard sizes (OD 20-50 mm).

GNEE pricing by size (C68700-O60, 500 kg order):

Why small tubes cost more: More drawing passes required. Higher rejection rate during manufacturing. Same setup cost spread over fewer kg.

GNEE tip: For best price per kg, choose OD 19-32 mm and wall 2.0-2.5 mm. These are stock sizes. Custom sizes add 15-25% to price.

Annealed (O60) is standard and lowest cost. Aged adds 10-15%. H80 is similar to O60.

Price comparison by temper (25mm x 2.0mm, 500 kg):

Why aged costs more: Heat treatment requires 2 hours at 300°C in a controlled atmosphere furnace. Additional handling and quality control. GNEE runs hardness tests on every aged tube (180 HB minimum).

GNEE recommendation: Do not pay for aged unless you actually need the hardness. For 90% of buyers, O60 works perfectly.

Price drops significantly above 1,000 kg. Below MOQ, buyers pay a premium.

GNEE volume pricing (C68700-O60, 25mm x 2.0mm):

MOQ explained:

Standard sizes (OD 12-50 mm, wall 2-5 mm): MOQ = 500 kg

Non-standard sizes: MOQ = 1,000 kg

Nano-treated tubes: MOQ = 200 kg (lower because GNEE wants to promote)

Sample orders: 50-200 kg accepted at higher per-kg price

GNEE tip: Combine multiple sizes into one order to reach 1,000 kg. The price break at 1,000 kg saves 15-20% compared to 500 kg.

As-drawn is cheapest. Polished adds 5-10%. Nano-treated adds 18-22%.

Surface treatment pricing (25mm x 2.0mm, 1,000 kg):

When to pay for nano-treatment:

Polluted or sulfide-containing seawater

Low flow or stagnant conditions (firewater systems)

Warm water >30°C (biofouling risk)

Desalination plants (extends cleaning interval)

When as-drawn is fine:

Clean open ocean seawater

Flow velocity >1 m/s continuous

Temperature <25°C

Budget-constrained projects

GNEE data: Nano-treated C68700 pays for itself in 3-8 months for most marine applications through reduced cleaning and longer life.

Standard EN 10204 3.1 certificate is included. Type 3.2 or class society stamp adds cost.

Certification pricing:

GNEE recommendation: For most buyers, EN 10204 3.1 is sufficient. Pay for class society stamps only if your contract requires them. Type 3.2 is rarely needed – 3.1 is accepted by 95% of buyers.

Export from China adds $0.5-2.00 per kg depending on destination and quantity.

Shipping cost estimates (per kg, sea freight, 1,000 kg order):

Air freight (for urgent orders): Add $5-8 per kg. Delivery in 3-7 days instead of 25-35 days.

GNEE tip: Consolidate orders to fill a 20-foot container (about 18,000 kg of tubes). Freight cost per kg drops by 40-50%. GNEE can hold your order for up to 60 days while you accumulate quantity.

C68700 price tracks LME copper price. When copper moves $1,000/ton, C68700 price moves $0.80-1.00 per kg.

Current pricing basis (2025):

LME copper: $8,500-9,500 per ton

C68700 base formula: (LME copper × 0.78) + processing cost + margin

Processing cost: $2-4 per kg depending on size

Copper price impact example:

How to manage copper price risk:

Request fixed pricing for 30-60 days from GNEE

Place larger orders less frequently (copper averages out)

Ask GNEE about copper hedging (available for orders >10,000 kg)

GNEE note: GNEE prices are fixed for 14 days on written quotes. For project budgets, assume $12-15 per kg for standard C68700.

Cheaper upfront cost often means higher lifetime cost. Here is the 15-year TCO comparison:

Scenario: Seawater cooling system, 1,000 meters of 25mm tube, 15-year operation.

Conclusion: C68700 costs more upfront but saves $135,000-220,000 over 15 years compared to yellow brass.

Q1: What is the current price of ASTM B111 C68700 aluminum brass tube from GNEE?
A: $11-14 per kg for standard size (25mm x 2.0mm) O60 temper, 1,000 kg order, FOB China.
Price includes EN 10204 3.1 mill certificate, ASTM G48 dezincification test report, and standard export packaging. Add $2-4 per kg for nano-treatment, aged temper, or class society stamps. Contact GNEE for a firm quote with your specifications.

Q2: Why is C68700 more expensive than standard brass (C27000)?
A: C68700 contains 1.5-2.5% aluminum and has stricter manufacturing controls.
Aluminum is more expensive than zinc. C68700 also requires more drawing passes and 100% eddy current testing. The price difference is 20-40% – but C68700 lasts 8-10 times longer in seawater. Over 15 years, C68700 is much cheaper.

Q3: Does GNEE offer discounts for large orders?
A: Yes – prices drop 15-25% at 5,000 kg and 25-35% at 20,000 kg (full container).
Example: 25mm x 2.0mm O60. 500 kg = $14-18/kg. 5,000 kg = $11-13/kg. 20,000 kg = $9-11/kg. Contact GNEE for a volume discount schedule.

Q4: How much does nano-treated C68700 cost compared to standard?
A: Nano-treated adds 18-22% to the base price.
Standard 25mm tube: $11-14/kg. Nano-treated: $14-18/kg. The extra cost pays back in 3-8 months through reduced cleaning, longer life, and fewer shutdowns. For polluted seawater or low-flow conditions, GNEE recommends nano-treated despite the higher upfront cost.

Q5: What is included in the GNEE C68700 price?
A: FOB China price includes: tube, EN 10204 3.1 certificate, ASTM G48 test report, standard packaging (wooden crates), and loading.
Not included: sea freight, insurance, import duties, inland delivery at destination, or third-party inspection. GNEE can arrange shipping at buyer's cost. Request CIF or DDP pricing for delivered price.

Every lot of C68700 material undergoes a multi-step inspection protocol:
1) Chemical composition verified by Oxford Spectrometer (meeting ASTM B111/B135).
2) Mechanical properties tested via 300kN universal tester for tensile strength (≥370MPa) and hardness (80-110 HRB).
3) Dimensional accuracy checked by laser micrometer and pneumatic gauge.
4) Anti-corrosion validation includes mercurous nitrate test and dezincification depth analysis (≤200μm per ASTM B858).
5) Non-destructive testing – 100% eddy current or ultrasonic flaw detection.
We provide traceable mill test certificates (MTC) for each shipment, with third-party inspection (SGS/BV) available upon request.

After passing inspection, all tubes are packed according to export standards and customer-specific requirements. The packing process is documented below to ensure traceability and damage-free delivery.

Packing steps shown in video & images:
1. Tube cleaning & drying
2. Plastic end caps on both ends
3. VCI anti-rust paper wrapping
4. Bundle strapping with moisture barrier film
5. Plywood wooden case (ISPM-15 compliant) with foam padding
6. Labeling with ASTM grade, lot number, and inspection stamp

Our C68700 (Aluminum Brass) production line is equipped with Germany-derived continuous extrusion presses, high-precision tandem cold rolling mills, and online solution heat treatment furnaces. The automated casting system ensures homogeneous distribution of aluminum and arsenic elements, while the in-line eddy current testing devices monitor surface defects in real time. With CNC-controlled straightening and cutting machines, we can supply C68700 tubes and rods in custom lengths (±0.5mm tolerance), supporting OD from 6mm to 219mm for condenser and heat exchanger applications.

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