Copper-Nickel-TinBeryllium-freeIn production
Hardiall
CuNi15Sn8 · C72900
Hardiall is a spinodally hardened copper-nickel-tin alloy supplied as bars and hollow bars. Engineers use it for bushings and bearings that carry heavy loads in landing gear, drilling equipment and heavy industrial machinery.
150–1,250 MPaYield strength
400–1,300 MPaTensile strength
1–40 %Elongation
277 HBHardness HB
Specify this grade
Qualification packs are released after a short form. Export control applies.
Properties
Guaranteed values, by temper.
- Alloy family
- Copper-Nickel-Tin
- Chemistry family
- CuNiSn
- Lead-free
- Yes
Forms
Forms & dimensions available
Bars23 variant(s)
Rods6 variant(s)
Strips7 variant(s)
Tubes1 variant(s)
Wires6 variant(s)
Dimensional ranges and tolerances on request — machining and finishing are in house.
Standards
Standards & equivalences
- AMS 4596
- AMS 4597
- AMS 4598
- ASTM B929
- CW355H
- NACE MR0175
Product and process qualifications are listed above. Customer approvals are confidential and are not disclosed.
Applications
Markets & applications
Applications
- Bushings and bearings for landing gear and flight control actuation
- Valve guides, thrust washers and piston pin bushings in powertrains
- Bushings and wear contact pads in heavy metallurgical equipment
- Bearings and bushings for drilling components and wellhead controls
- Gear drives and worm wheels
Why this grade
Resists wear, galling, stress relaxation, corrosion and erosion in loaded bearing surfaces
Direct replacement for beryllium copper and leaded beryllium copper
Non-magnetic and non-sparking, with no hydrogen embrittlement
Keeps its performance at both elevated and sub-zero temperatures
Alternatives
If this grade is not the right trade-off.
GradeChemistryYield strengthChoose it when
HardiallYou are hereCuNiSn1,250 MPaChoose it when a bearing or bushing machined from bar or hollow bar must be compliant with AMS 4596, AMS 4597 or AMS 4598. It also offers the widest choice of tempers in the family.
DeclaforCuNiSnTe850 MPaChoose it when a precision part is machined from rod and its finish matters, since Declafor is the grade of the family with a tellurium addition for machining and polishing.
Hardiall EcoCuNiSn724 MPaChoose it when a bushing or bearing machined from bar needs the wear behaviour of the Hardiall range and no aerospace specification applies to the part.
Niclafor 1000CuNiSn1,100 MPaChoose it when a contact, spring or shield is stamped or formed from strip or wire and needs more strength than Niclal 725 offers, compliant with ASTM B740.
Niclal 725CuNiSn600 MPaChoose it when a connector or sensor part is bent or deep drawn from strip, and a balance of elasticity and conductivity matters more than the strength of Niclafor 1000.