What C19400 copper strip solves - in one sentence: if you need customized copper strip that delivers high conductivity for lead frames and connectors, C19400 (CuFe2P / CW107C) gives you 60–68% IACS conductivity with up to 570 MPa tensile strength - the world's most widely used lead-frame copper alloy, with MTC certification and fast delivery from a China supplier.
C19400 copper strip (UNS C19400, CuFe2P, CW107C, ASTM B465) is a copper-iron-phosphorus alloy containing approximately 2.4% iron, 0.03% phosphorus, and 0.1% zinc. It achieves its strength through precipitation of fine iron-rich particles during aging, delivering a balance of high conductivity and medium-to-high strength that pure copper cannot match.
The key performance advantage: C19400 delivers electrical conductivity of 60–68% IACS with tensile strength up to 570 MPa in the ESH temper. This makes it the material of choice for lead frames, connectors, and electrical components - applications where you need better strength than pure copper without the conductivity loss of bronze or brass.
As a China supplier, we provide customized strip widths, tempers, and thicknesses with fast delivery and full traceability. Every shipment includes a Mill Test Certificate (MTC) documenting chemical composition and mechanical properties to ASTM B465.
Key Specifications
Chemical Composition (ASTM B465 / B888, wt.%)
| Element | Content |
|---|---|
| Cu | Balance (≥97.0) |
| Fe | 2.1–2.6 |
| Zn | 0.05–0.20 |
| P | 0.015–0.15 |
| Pb | ≤0.03 |
Mechanical Properties (Typical by Temper)
| Temper | Tensile Strength | Yield Strength (0.2%) | Elongation | Hardness (HV) |
|---|---|---|---|---|
| O | 275–345 MPa | ≥110 MPa | ≥30% | 80–100 |
| H02 (1/2H) | 360–430 MPa | ≥270 MPa | ≥6% | 115–135 |
| H04 (H) | 410–480 MPa | ≥360 MPa | ≥4% | 125–145 |
| H08 (SH) | 480–520 MPa | ≥420 MPa | ≥4% | 140–160 |
| H10 (ESH) | 530–570 MPa | ≥470 MPa | ≥1% | 150–170 |
Physical Properties
| Property | Value |
|---|---|
| Electrical Conductivity | 60–68% IACS |
| Thermal Conductivity | 260 W/(m·K) |
| Density | 8.9 g/cm³ |
| Melting Range | 1080–1090°C |
| Modulus of Elasticity | 121 GPa |
| Softening Temperature | >470°C |
Available Strip Sizes
| Item | Range |
|---|---|
| Thickness | 0.05 mm – 2.5 mm (customized available) |
| Width | 7 mm – 610 mm (custom slit) |
| Condition | O, H02, H04, H08, H10 |
| Surface | Bright, clean, ready for stamping |
Why Choose Our C19400 Copper Strip?
Superior Electrical & Thermal Conductivity
Achieving electrical conductivity of 57%–68% IACS, our C19400 strips ensure efficient signal transmission and heat dissipation. With thermal conductivity up to 260 W/(m·K) and thermal diffusivity of 75 mm²/s, the alloy effectively conducts heat away from chips through the die pad and leads - a critical requirement for power semiconductors and high-density ICs.
High Strength & Reliability
Our C19400 copper strip delivers tensile strength ranging from 310 MPa to 630 MPa depending on temper, with hardness from HV 120 to 195. The alloy exhibits:
- Excellent stress relaxation resistance and creep resistance
- Strong high-temperature softening resistance (softening point above 470°C)
- Outstanding deformation resistance and rigidity
- Fine and uniform grain structure for consistent performance
Superior Surface & Processability
Our strips feature dense, clean surfaces with strong adhesion for nickel, silver, and gold plating. The material offers excellent solderability and plateability, along with:
- Good cold workability and stamping capability
- Etching adaptability for high-precision lead frames
- Flat shape with no waves or camber
- Excellent corrosion resistance
Customization Options
As a professional China supplier, we offer fully customized solutions to meet your specific requirements:
| Customization Parameter | Parameters |
|---|---|
| Alloy Grade | C19400 (UNS C19400, Cu‑Fe‑P, CW107C) |
| Form | Copper strip, copper coil, slit strip |
| Thickness | 0.05 mm‑3.0 mm (customizable) |
| Width | 7 mm‑1220 mm, custom slitting available |
| Temper | Annealed, 1/2 Hard, Hard, Spring Hard |
| Standard | ASTM B465, ASTM B543 |
| Surface | Bright rolled, mill finish, degreased surface |
| Edge Condition | Slit edge, deburred, or rounded |
| Coil Weight | Custom per customer requirement |
| Packaging | Standard export packaging or customized |
| Optional Service | Precision slitting, leveling, cutting‑to‑length |
Delivery & Commercial Terms
The table below outlines our standard commercial and shipping conditions. All terms are negotiable for large-volume or long-term contracts.
| Item | Details |
|---|---|
| MOQ (Minimum Order Quantity) | 200 kg per specification (lower quantities accepted for trial orders; contact us for samples) |
| Lead Time | 15–25 working days after order confirmation and deposit receipt (depending on quantity and customization) |
|
Trade Price Term |
Shanghai / Ningbo, China (other ports available upon request)
CFR, CIF, DDP optional |
| Payment Terms | T/T, L/C, D/P, PayPal,we usually require 50% deposit and 50% balance before shipment. |
| Packaging | Standard export seaworthy packaging: • Coils wound on steel spools • Anti-rust VCI paper + plastic film • Wooden crates or steel pallets • Custom packaging available |
| Certificates | • Material Test Report (MTR) per ASTM B465 / B888 • ISO 9001:2015 Quality Management • RoHS & REACH compliance • Mill Test Certificate (chemical & mechanical properties) • Third-party inspection (SGS/BV) available upon request |
C19400 vs C19210 vs C70250: Which Lead Frame Copper Strip Do You Need?
This is the comparison buyers ask about most. Each alloy makes a different trade-off between conductivity, strength, and cost.
| Property | C19400 (CuFe2P) | C19210 (CuFe0.1P) | C70250 (CuNi3Si) |
|---|---|---|---|
| UNS | C19400 | C19210 | C70250 |
| Generation | 2nd Generation | 1st Generation | 3rd Generation |
| Electrical Conductivity | 60–68% IACS | 85%+ IACS | 40–48% IACS |
| Tensile Strength (max) | 570 MPa | ~400 MPa | 860 MPa |
| Thermal Conductivity | 260 W/(m·K) | 350 W/(m·K) | 147–190 W/(m·K) |
| Key Advantage | Best conductivity-strength balance | Highest conductivity | Highest strength |
| Typical Use | IC lead frames, connectors | Discrete transistors, fuses | High-pin-count IC packages |
How to choose:
- Choose C19400 when you need a cost-effective balance of high conductivity and medium-to-high strength for IC lead frames, connectors, and general electrical components.
- Choose C19210 when your priority is maximum electrical conductivity for discrete transistors, fuses, and current-carrying components - but you can accept lower strength.
- Choose C70250 when you need higher strength and better heat resistance for high-pin-count IC packages and advanced connectors where C19400's strength is insufficient.
The generation advantage: C19400 is the 2nd generation lead-frame copper alloy - it offers medium strength and medium conductivity, making it the industry workhorse for IC lead frames and general-purpose connectors. C19210 is the 1st generation (high conductivity, low strength), and C70250 is the 3rd generation (high strength, lower conductivity).
Need help on material comparison? Read our lead‑frame copper alloy selection guide to compare C70250, C70350, C18150,C19210 and other grades.
Applications
Our customized C19400 copper strip is widely used in:
- IC Lead Frames – SOP, SOIC, TSSOP, DFN/QFN, QFP packages
- Semiconductor Devices – Power management chips, memory chips, logic chips, sensor ICs
- Discrete Components – Small-signal transistors, diodes, Zener diodes
- LED Packaging – LED brackets, COB, high-power LED bead brackets
- Connectors & Terminals – High-reliability electrical interconnections
- Automotive Electronics – Power semiconductor packages
- New Energy Vehicles – High-current connection applications
Why Choose HSMetal as Your C19400 Suppliern
- Experienced Manufacturer – Specialized in copper alloy strip production for the semiconductor industry
- Competitive Pricing – Direct from China supplier with cost-effective solutions
- Flexible MOQ – Accommodating both small-batch trials and large-volume orders
- Fast Delivery – Reliable lead times with efficient production and logistics
- Technical Support – Engineering assistance for material selection and process optimization
- Global Export – Shipping to customers worldwide with professional export documentation
We are a reliable China‑based supplier specialized in high‑performance copper alloy materials. We strictly control rolling, annealing and slitting procedures for lead‑frame‑grade C19400 strip. We support small trial orders and mass‑volume bulk orders, serving semiconductor packaging, electronics and automotive clients worldwide.
About Us
We are a professional manufacturer and exporter specialized in high-performance copper alloy strips, coils and foils for global electronic and semiconductor industries. With years of focused production experience in high conductivity C19400 copper alloy, C70250 Cu-Ni-Si alloy and other precision copper materials for lead frames and electronic terminals, we have built a complete production, quality inspection and export service system.
Our factory is equipped with advanced precision rolling, continuous annealing, slitting and surface treatment production lines. We strictly implement ASTM international standards and full-process quality control, focusing on producing high-conductivity, high-precision, stable-performance copper alloy materials. All products are fully inspected before delivery, with complete test reports and certification documents to meet global customer quality requirements.
Dedicated to providing customized copper alloy solutions for semiconductor packaging, automotive electronics, new energy and precision electrical industries, we support small trial orders and large-scale bulk orders. Adhering to the principle of quality priority and customer-oriented service, we have established long-term stable cooperative relationships with customers from Europe, America, Southeast Asia, the Middle East and other regions, winning wide recognition
Our Factory
Copper Strip Slitting In Production Line
Copper Strip Production Line
Red Copper Strip Production Line
Vacuum Melting Furnace
250KG Vacuum Induction Melting Furnace (VIM)
Solution Annealing Furnace
How Do I Avoid Procurement Pitfalls When Buying C19400 Copper Strip?
Key Check List:
- Verify the grade - confirm UNS C19400 / CuFe2P / CW107C equivalence.
- Check iron and phosphorus content - Fe 2.1–2.6%, P 0.015–0.15%.
- Confirm the temper - O, H02, H04, H08, or H10; verify against your forming and strength requirements.
- Request the Mill Test Certificate (MTC) - confirm compliance to ASTM B465.
- Verify strip dimensions - thickness and width tolerance.
- Request residual stress data - critical for etching lead frame applications.
- Request PMI verification - confirms material authenticity.
Need Customized C19400 Copper Strip?
Tell us your required thickness, width, temper, and application. We will confirm availability, provide a quotation, and ship with full documentation.
FAQ
Q1: What is C19400 copper strip used for?
A: C19400 is used for IC lead frames, LED lead frames, electrical connectors, terminal pins, relays, fuse boxes, and contact springs. It is chosen when you need high electrical conductivity (60–68% IACS) combined with medium-to-high strength (up to 570 MPa) at a cost-effective price.
Q2: What is the difference between C19400 and C19210?
A: C19210 has higher conductivity (85%+ IACS vs 60–68%) but lower strength (~400 MPa vs 570 MPa). C19210 is the 1st generation lead-frame alloy for discrete transistors and fuses; C19400 is the 2nd generation for IC lead frames and connectors. Choose C19400 for a balance of conductivity and strength; choose C19210 for maximum conductivity in current-carrying components where strength is not critical.
Q3: What is the difference between C19400 and C70250?
A: C19400 has higher conductivity (60–68% vs 40–48% IACS) but lower strength (570 MPa vs 860 MPa). C19400 is the 2nd generation for general IC lead frames; C70250 is the 3rd generation for high-pin-count IC packages. Choose C19400 for cost-sensitive general-purpose applications; choose C70250 for high-density IC packaging where higher strength is required.
Q4: What is the softening temperature of C19400?
A: C19400 has a softening temperature above 470°C. This is significantly higher than pure copper (~200°C), meaning it retains its strength after soldering, welding, or high-temperature exposure - critical for automotive and industrial applications.
Q5:What thickness and width ranges are available?
A: We offer fully customizable dimensions:
Thickness: 0.05 mm – 3.0 mm (0.08–2.0 mm standard)
Width: Up to 620 mm (3 mm minimum)
Tolerances strictly comply with ASTM B465 standards
Q6: What is the conductivity and strength of C19400 copper alloy?
A:The electrical conductivity of C19400 copper strip reaches 60–66 %IACS, which is much higher than C70250 and other high-strength copper alloys. With medium-high tensile strength of 360–490 MPa, it perfectly balances electrical conductivity and mechanical properties, suitable for most conventional electronic conductive structural parts.
Q7: What tempers are available for C19400 strip?
A: Available tempers include O (soft), H02 (1/2 hard), H04 (hard), H08 (spring), and H10 (extra spring). Temper selection depends on required strength and formability. For lead frames requiring forming after stamping, H02–H04 is common. For maximum strength, H10.
Q8: Is C19400 resistant to stress relaxation?
A: C19400 has good stress relaxation resistance - it maintains contact force at elevated temperatures, making it suitable for automotive and industrial connectors. However, for the most demanding high-temperature spring applications, C70250 may offer superior stress relaxation resistance.
Q9: What is the thermal conductivity of C19400?
A: C19400 has a thermal conductivity of 260 W/(m·K). This is excellent for heat dissipation in lead frames and power components - significantly higher than C70250 (147–190 W/(m·K)).
Q10: What is the one-line rule for choosing C19400?
A: Choose C19400 copper strip when you need the best high conductivity and high strength balance at a cost-effective price for lead frames, connectors, and electrical components. For higher conductivity with lower strength, choose C19210. For higher strength and better heat resistance, choose C70250.
Q11:Is C19400 copper strip easy to stamp and bend?
A:Absolutely. C19400 Cu-Fe-P alloy has excellent ductility and processing performance, low cracking rate during high-speed stamping and bending, and features stable size after processing. It is very suitable for automated mass production of lead frame and terminal parts.
Q12:How about your product packaging for export?
A:We adopt standard export packaging: inner waterproof film and moisture-proof paper, outer solid wooden pallet or wooden box. Strict fixed packaging effectively avoids deformation, oxidation and damage during long-distance sea and air transportation.
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