Bar and Rod
Plate and Sheet
Strip
Pipe and Tube
Wire
Welding
Powder Material
Cast Products
Forged Products
Fittings
Fastening
Round Bar:
φ2–500 mm, 1–6 m length
Flat/Square Bar:
4–100 mm thickness/width
Hex Bar:
A/F 3–100 mm
Hollow Bar:
OD 20–300 mm
Sheet:
0.3–6 mm thickness
Medium Plate:
6–25 mm thickness
Heavy Plate:
25–100 mm thickness
Standard Strip:
0.05–3 mm thick,
10–600 mm wide
Precision strip:
0.01–0.5 mm thick,
tight tolerance ±0.005 mm
Foil:
0.005–0.1 mm thick
Seamless Tube:
OD 6–450 mm,
WT 1–50 mm,
1–12 m length
Welded Tube:
OD 10–600 mm,
WT 1–20 mm
Capillary Tube:
OD 1–10 mm,
WT 0.1–2 mm
Wire Form:
Cold Drawn Wire,
Bright Wire,
Spring Wire,
Fine Wire,
Ultra-fine Wire
General Diameter:
φ0.1–10 mm
Coil Weight:
50–500 kg,
customizable tolerance
Solid Wire:
φ0.8–4.0 mm
Flux-cored Wire:
φ1.2–4.0 mm
Welding Rod:
φ2.0–5.0 mm
Powder Form:
AM 3D Printing Powder,
Spherical Powder,
Gas-atomized Powder,
Water-atomized Powder
Particle Size:
10–150 μm
Sphericity:
≥90% for AM grade
Cast Ingot:
φ200–800 mm
Precision Casting:
min wall 0.5 mm
Cast Pipe:
OD 100–600 mm,
WT 10–50 mm
Forged Bar:
Φ35–500 mm
Forged Ring:
OD 200–2000 mm
Forging Weight:
1–5000 kg
Fittings Form:
Elbow, Tee, Reducer, Flange, Cap, Outlet, Lap Joint
Size range:
1/2''–24'' (DN15–DN600)
Wall thickness:
Sch10–Sch160, STD, XS, XXS
Pressure Class:
150–2500 LB
Fastening Form:
Bolt, Nut, Screw, Stud, Washer, Pin, Rivet
Metric: M3–M64
Imperial: #4–2.5''
Length: 6–500 mm
R30159 is a nickel–cobalt-base multiphase alloy that combines ultra-high strength with good ductility, toughness and excellent corrosion resistance. This datasheet presents the material within the American (SAE-AMS / UNS) standard system.
It belongs to the "Multiphase" (MP) family, developed as a fastener alloy able to perform at the higher operating temperatures required by turbine engines and other high-performance machinery. Strength is developed by a unique mechanism: cold working metastable face-centred-cubic (FCC) material below the transformation-zone temperature transforms part of the structure into hexagonal-close-packed (HCP) platelets dispersed through the FCC matrix; a subsequent aging treatment then precipitation-strengthens the alloy. Through this work-strengthening-plus-aging route the alloy reaches ultimate tensile strengths in excess of 1830 MPa (to ~275 ksi), with yield strength to ~265 ksi, while retaining excellent ductility and toughness.
It has advantages similar to MP35N but can operate at temperatures up to about 593 °C (1100 °F), and is suitable for short-term use at even higher temperatures. It offers excellent fatigue and creep strength at elevated temperatures and superb resistance to crevice corrosion, stress-corrosion cracking and hydrogen embrittlement. It is produced by vacuum induction melting followed by vacuum-arc remelting for optimum chemistry control. Typical applications include high-strength fasteners, jet-engine components, prosthetic (implant) devices, and marine and petroleum-industry hardware.
Values per manufacturer / ASM data, work-strengthened and aged condition.
| Property | Value | Unit |
|---|---|---|
| Density | 8.43 | g/cm³ |
| Young's modulus (20 °C) | 211 | GPa |
| Coefficient of thermal expansion (20–100 °C) | 12.6 | µm/m·°C |
| Thermal conductivity (20 °C) | ~11 | W/m·K |
| Maximum service temperature | ~593 (1100 °F); short-term higher | °C |
| Melting / processing | VIM + VAR | — |
| Structure | Multiphase: FCC matrix + HCP platelets | — |
Nominal composition per ASM Alloy Digest Co-138 (UNS R30159).
| Element | Symbol | Value | Role in Alloy |
|---|---|---|---|
| Cobalt | Co | ~36 | Base element; multiphase FCC/HCP structure |
| Nickel | Ni | ~25 | Matrix stability; toughness |
| Chromium | Cr | ~19 | Corrosion resistance |
| Iron | Fe | ~9 | Alloying / structure |
| Molybdenum | Mo | ~7 | Solid-solution strengthening; corrosion resistance |
| Titanium | Ti | ~2.9 | Age-hardening (precipitation) |
| Niobium | Nb | ~0.5 | Age-hardening |
| Aluminium | Al | ~0.2 | Minor strengthening |
Nominal designation: 36Co-25Ni-19Cr-9Fe-7Mo-2.9Ti-0.5Nb-0.2Al. The combination of the multiphase (FCC + HCP) structure with Ti/Nb precipitation gives the ultra-high strength.
Typical room-temperature properties; strength depends strongly on condition (AMS 5841 solution-treated → 5842 work-strengthened → 5843 work-strengthened + aged).
| Property | Value | Condition |
|---|---|---|
| Ultimate tensile strength | up to ~1900 MPa (275 ksi) | Cold-worked + aged (AMS 5843) |
| 0.2% proof strength (yield) | up to ~1827 MPa (265 ksi) | Cold-worked + aged |
| Ultimate tensile strength | >1830 MPa typical | Work-strengthened + aged |
| Elongation | Good ductility retained | Cold-worked + aged |
| Toughness / fatigue | Excellent | — |
The alloy also offers excellent fatigue and creep strength at elevated temperature. Strength is developed by cold work (FCC→HCP transformation) plus aging, not by conventional quench-hardening. Values are typical; confirm against the mill test certificate and the relevant AMS condition.
| Environment | Performance | Notes |
|---|---|---|
| Seawater / marine | Excellent | Similar to MP35N |
| Salt spray | Excellent | Marine/aerospace service |
| Mineral acids | Very Good | Similar to MP35N |
| Hydrogen sulphide (H₂S) | Excellent | Sour petroleum service |
| Crevice corrosion | Superb | Key advantage |
| Stress-corrosion cracking | Superb | High resistance |
| Hydrogen embrittlement | Superb | Important for high-strength fasteners |
A multiphase alloy strengthened by cold work (FCC→HCP transformation) followed by aging; not a conventional quench-hardening alloy.
Solution Heat Treat (AMS 5841) Temperature: 1900–1925 °F (1038–1052 °C), 4–8 h, water quench
Work Strengthening (AMS 5842) Cold work / strain hardening after solution treatment (FCC→HCP transformation)
Aging (AMS 5843) Temperature: 1200–1250 °F (649–677 °C), ~4–4.5 h, air cool Purpose: precipitation strengthening to develop full ultra-high strength.
Maximum strength is obtained in the solution-treated + work-strengthened + aged (AMS 5843) condition.
MP159 is a high-strength precipitation/transformation-strengthened fastener alloy; it is generally used in mechanically fastened or threaded form rather than welded structures. Joining should follow the manufacturer's recommendations, as welding can disrupt the cold-work-plus-aging strengthening that gives the alloy its ultra-high strength.
| Process | Applicability | Notes |
|---|---|---|
| Mechanical fastening / threading | Primary use | Fasteners, bolts, studs |
| Welding | Limited / specialised | Consult manufacturer; affects strengthening |
For threaded fasteners, rolling of threads after final heat treatment is commonly used to maximise fatigue strength.
Machining Guidelines
| Parameter | Recommendation |
|---|---|
| Strength / hardness | Very high (esp. work-strengthened + aged); rigid setup, sharp carbide tooling |
| Work hardening | High; positive rake, low speeds, ample feed |
| Preferred condition | Machine before final work-strengthening/aging where possible |
| Coolant | Ample flood coolant |
Forming Processes
| Process | Notes |
|---|---|
| Cold work | Integral to strengthening (FCC→HCP transformation) |
| Thread rolling | After heat treatment, to maximise fastener fatigue strength |
| Aging | 1200–1250 °F to develop full strength |
| Industry | Typical Components | Key Requirements |
|---|---|---|
| Aerospace | High-strength fasteners, bolts, studs | Ultra-high strength + fatigue to 593 °C |
| Jet engines | Turbine-engine components, fasteners | Strength + creep + corrosion at temperature |
| Medical | Prosthetic / implant devices | Strength + biocompatibility + corrosion resistance |
| Marine | Marine hardware and fasteners | Seawater + crevice/SCC resistance |
| Petroleum | Downhole and sour-service hardware | H₂S resistance + strength |
| Product Form | AMS Standard | Condition |
|---|---|---|
| Bar (round) | AMS 5841 | Solution heat treated |
| Bar | AMS 5842 | Solution treated + work strengthened |
| Bar | AMS 5843 | Solution treated + work strengthened + aged |
| Wire / fastener stock | AMS 5842 / 5843-related | Work strengthened (+ aged) |
Nickel-cobalt multiphase ultra-high-strength alloy. UNS R30159. Reference: ASM Alloy Digest Co-68 / Co-138. Produced by VIM + VAR. (MP159 is a registered trademark of SPS Technologies.)
| UNS | Type | Nominal | Strength | Best Used For |
|---|---|---|---|---|
| R30159 | Ni-Co multiphase | Co36-Ni25-Cr19 | up to ~1900 MPa | Ultra-high-strength fasteners to 593°C |
| R30035 | Ni-Co multiphase | Ni35-Co35-Cr20-Mo10 | up to ~1900 MPa | Multiphase fasteners to ~400°C |
| N07718 | Ni-base age-hard. | Ni-Cr-Fe-Nb | ~1240-1400 MPa | Turbine discs/fasteners to 650°C |
| N07001 | Ni-base age-hard. | Ni-Cr-Co-Mo | ~1280 MPa | Turbine hardware >700°C |
| S66286 | Fe-base age-hard. | Fe-Ni-Cr-Ti | ~1000 MPa | Fasteners to 704°C (lower cost) |
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