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Copper Alloys dealers in UAE

C18150 / CuCrZr / 2.1293

C18150 / CuCrZr (2.1293, CW106C) - premium precipitation-hardening copper chromium zirconium alloy. Greater strength (up to 550 MPa TH04) and better elevated-temperature property retention than C18200, with equivalent conductivity (>80% IACS). The preferred grade for demanding resistance welding and high-stress mould applications.

Industries Served

Manufacturing
Automotive
Aerospace & Defense
Power Generation
Heavy Engineering
Mould & Die
Oil & Gas

Applications

  • High-performance resistance welding electrodes for heavy-gauge automotive steel and high-strength steel welding where C18200 softens under load
  • Water-cooled induction heating coil tubes for high-power induction hardening and brazing equipment operating at elevated temperatures
  • Plastic injection mould cores and inserts for high-output moulds requiring both maximum thermal conductivity and mechanical strength under injection pressure
  • Continuous casting mould liners for steel and aluminium casting where the combination of high heat extraction and mechanical durability is critical
  • Resistance welding electrode holders and arm bodies for heavy-duty seam welding and projection welding of high-strength materials
  • Die casting plunger tips and shot sleeves requiring high hardness and conductivity for extended service life in aluminium and zinc die casting
  • High-current contact springs and flexible connectors in switchgear requiring both conductivity and fatigue strength
  • Aerospace structural electrical bonding components requiring high conductivity and fatigue resistance under vibration loads
  • Heat exchanger tube sheets and headers in high-pressure thermal systems where elevated-temperature strength and conductivity must be combined
  • Precision mould components for automotive headlamp reflector and lens moulds requiring high polish, thermal conductivity, and dimensional stability

Chemical Composition

Cu

Copper

0.9 %
Cr

Chromium

0.5 – 1.5 %

0.1 %
Zr

Zirconium

0.03 – 0.3 %

Si

Silicon

≤ 0.1 %

Fe

Iron

≤ 0.08 %

Pb

Lead

≤ 0.01 %

Other

total

≤ 0.3 %

Typical value Range (min–max) Minimum (≥) Maximum (≤) Hover / tap for notes

Standard

BS EN 12163 - current edition

Available Forms

Round Bar

Diameter 6-200 mm. Extruded and drawn. Per BS EN 12163 / ASTM B197. For high-performance resistance welding electrodes, mould inserts, and precision electrical components requiring combined conductivity and strength superior to C18200. Maximum diameter smaller than C18200 due to higher alloy content affecting extrusion. TH04 and M conditions available.

Flat Bar

Thickness 5-100 mm, width up to 300 mm. Per BS EN 12163 / BS EN 12167. For resistance welding bus bars, contact plates, and high-strength electrode arm components.

Plate

Thickness 10-120 mm. Per ASTM B197. For mould platens, die casting fixtures, and high-stress electrical contact bases where C18200 strength is insufficient. Cut-to-size available.

Block

Thickness 10-120 mm. Per ASTM B197. For mould inserts and welding fixtures requiring high-stress, high-conductivity copper where C18200 strength is insufficient. Cut-to-size available.

Pipe / Tube

Seamless tube per ASTM B441. OD 10-100 mm (stock OD 10-80 mm), wall thickness 1.5-10 mm (stock wall 1.5-8 mm). For water-cooled induction coil holders and resistance welding electrode cooling circuits requiring higher strength than C18200 tube. Specify OD x wall thickness x length.

Designations & Equivalents

StandardDesignationNotes
UNSC18150—
EN NameCuCrZrEN / DIN name
EN / WerkstoffCW106CEN numeric code (CW106C)
EN / Werkstoff2.1293Werkstoff-Nr. (DIN)
ASTMB197 Alloy C18150ASTM strip/sheet/plate designation
ASTMB441 Alloy C18150ASTM tube designation
BSEN 12163 CuCrZr (CW106C)BS EN rod/bar designation
ISOISO 1337 CuCrZr—
Common NameChromium Zirconium Copper—
Common NameCopper Chromium Zirconium (CuCrZr)Common name variant

Compliance & Certification

StandardStatusNotes
EN 10204 3.1SuitableStandard with all supply - confirms chemical composition (including Cr AND Zr content), mechanical properties, and electrical conductivity (minimum 80% IACS for TH04 condition).
EN 10204 3.2ConditionalIndependent third-party inspection - available on request for critical applications.

Specifications

Mechanical Properties

Values are minimums unless noted; hardness is a maximum.

PropertyC18150 / CuCrZr / 2.1293 — EN 12163 — Precipitation Hardened TH04DefaultC18150 / CuCrZr / 2.1293 — EN 12163 — Solution Annealed
Tensile Strength (UTS)range480–550 MPaTypical: 515 MPaCondition: Room temp, longitudinalNotes: Per BS EN 12163 CuCrZr TH04. Significantly higher than C18200 TH04 (380-450 MPa).240–300 MPaTypical: 270 MPaCondition: Room temp, longitudinalNotes: Soft supply condition per BS EN 12163. Customer must age to achieve full properties.
Yield Strength (0.2% Proof Stress)range400–480 MPaTypical: 440 MPaCondition: Room tempNotes: 0.2% offset.90–160 MPaTypical: 120 MPaCondition: Room tempNotes: Slightly higher than C18200 M (70-140 MPa) due to Zr solid solution effect.
Elongationmin8 %Typical: 12 %Condition: 50 mm gauge lengthNotes: Adequate ductility after precipitation hardening.22 %Typical: 30 %Condition: 50 mm gauge lengthNotes: Good formability but slightly less than C18200 M due to Zr effect.
Hardnessrange75–90 HRBTypical: 82 HRBCondition: Rockwell BNotes: Higher than C18200 TH04 (68-80 HRB). Approximately 145-175 HB equivalent.55–70 HRBTypical: 62 HRBCondition: Rockwell BNotes: Slightly harder than C18200 M (50-65 HRB) due to Zr solid solution.
Electrical Conductivitymin80 % IACSTypical: 84 % IACSCondition: 20 degrees C, eddy current per ASTM E1004Notes: CRITICAL PROPERTY - confirmed on MTC. Same minimum as C18200 (80% IACS) despite higher strength.55–70 % IACSTypical: 63 % IACSCondition: 20 degrees CNotes: Lower than C18200 M (60-75% IACS) as both Cr and Zr are in solid solution. Recovers to greater than 80% IACS after aging at 470-490 degrees C.
Thermal Conductivitymax315 W/m.KCondition: 20 degrees CNotes: Approximately 79% of pure copper. Slightly lower than C18200 due to Zr addition. [VERIFY]240 W/m.KCondition: 20 degrees CNotes: Lower than TH04 - Cr and Zr in solution reduce conductivity. [VERIFY]

Physical Properties

PropertyC18150 / CuCrZr / 2.1293 — EN 12163 — Precipitation Hardened TH04DefaultC18150 / CuCrZr / 2.1293 — EN 12163 — Solution Annealed
Density20 degrees C8.9 g/cm38.9 g/cm3
Modulus of Elasticity25 degrees C128 GPa128 GPa
Thermal Conductivity20 degrees C315 W/m.K315 W/m.K
Coefficient of Thermal Expansion20-100 degrees C17 um/m.degC17 um/m.degC
Specific Heat Capacity20 degrees C385 J/kg.K385 J/kg.K
Melting Point / RangeSolidus1050 degrees C1050 degrees C
ENGINEERING NOTES
Weldability
Not_recommended

C18150 / CuCrZr has limited weldability - the same limitations apply as for C18200, and the zirconium addition can introduce additional complications in fusion welding. Welding is not recommended as a production joining process. Silver brazing (BAg-7 or equivalent at 620-680 degrees C) is strongly preferred and does not reduce conductivity in the adjacent parent material. If fusion welding is unavoidable: solution anneal first, use TIG (GTAW) with ERCu deoxidised copper filler and minimum heat input, then re-age at 450-500 degrees C immediately. The zirconium content can cause porosity if the weld atmosphere is not sufficiently inert - use high-purity argon back purging and cover gas throughout. One notable advantage of C18150 vs C18200 for welded assemblies: its superior resistance to softening means the HAZ retains better properties after re-aging. Recommended joining / filler metals: AWS BAg-7 silver brazing alloy (primary method; braze at 620-680 degrees C with flux; avoids HAZ precipitation problems and zirconium porosity risk; does not reduce conductivity of parent material); AWS BAg-24 silver brazing alloy (alternative for less critical joints; lower silver content than BAg-7); ERCu deoxidised copper filler for TIG (GTAW) emergency repair only (high-purity argon back purging and cover gas mandatory as zirconium oxidises readily; re-age at 450-500 degrees C after welding; conductivity in the HAZ will be reduced).

Machinability
Good

C18150 machines similarly to C18200 TH04 - machinability approximately 80-90% of free-machining brass. Use carbide tooling with positive rake angles, high cutting speeds, and flood or mist coolant. Slightly more challenging to machine than C18200 in the solution annealed condition due to the zirconium solid solution strengthening effect. TH04 condition gives better chip formation and surface finish than the soft M condition.

Overview

C18150 (EN CuCrZr, DIN Werkstoff 2.1293, EN CW106C) is a precipitation-hardening copper-chromium-zirconium alloy containing 0.50-1.50% chromium and 0.03-0.30% zirconium in a high-purity copper matrix. The zirconium addition is the defining characteristic that differentiates C18150 from the simpler C18200 (CuCr1) grade: it refines the microstructure, stabilises chromium precipitates against over-ageing, and significantly improves the retention of hardness and strength at elevated temperatures. In the TH04 precipitation-hardened condition, C18150 achieves tensile strengths of 480-550 MPa and hardness of 75-90 HRB while maintaining electrical conductivity above 80% IACS - providing approximately 30-40% greater strength than C18200 TH04 at equivalent conductivity. This combination makes C18150 the preferred high-conductivity copper alloy for the most demanding resistance welding electrode applications, high-performance mould inserts, and continuous casting equipment where C18200 strength margins are insufficient.

Nifty Alloys supplies C18150 / CuCrZr from stock in Dubai, UAE, in round bar, flat bar/rectangular bar, plate/block, and seamless tube in both the TH04 (precipitation hardened) and solution annealed (M) conditions. All material is supplied with EN 10204 3.1 Mill Test Certificates as standard - confirming chemical composition, mechanical properties, and electrical conductivity (minimum 80% IACS for TH04). EN 10204 3.2 third-party inspection is available on request. We deliver across the UAE within 24-48 hours and export to Saudi Arabia, Kuwait, Qatar, Oman, and Bahrain. Contact our team for same-day quotation and stock availability.

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C18150 (CuCrZr, 2.1293, CW106C) is the premium high-conductivity copper alloy for applications requiring both electrical conductivity greater than 80% IACS and the highest strength available in a precipitation-hardening copper grade. Key applications in UAE and globally include: high-performance resistance welding electrodes for heavy-gauge automotive steel, high-strength steel (HSS), and aluminium welding where C18200 softens under load; water-cooled induction heating coil tubes for high-power equipment; plastic injection mould cores and inserts for high-output precision moulds; continuous casting mould liners; die casting plunger tips; high-current contact springs requiring fatigue resistance; and heat exchanger tube sheets in high-pressure thermal systems. C18150 is specified over C18200 wherever higher mechanical strength at equivalent conductivity is needed, particularly in elevated-temperature service where the zirconium addition's superior over-ageing resistance provides a meaningful advantage.

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Ras Al Khor Ind. Area-2, Dubai United Arab Emirtates

+971 565450916

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