AerMet 100 (AMS 6532) - Ultra-High-Strength Alloy Supplier of Round Bars & Forgings | Shanghai Hangbo Alloy Group
Date: 2026年8月3日 Categories: News Views: 365
By Shanghai Hangbo Alloy Group Co., Ltd. - China Supplier | ISO 9001:2015 | Est. 2012
Contact: sales@hangboalloy.com | WhatsApp (Lisa): +86 13611656360
Quick Answer: What Is AerMet 100?
AerMet 100 (AMS 6532 / UNS K92580) is a premium cobalt-nickel secondary-hardening steel developed by Carpenter Technology that delivers a unique combination of ultra-high tensile strength (>=1930 MPa / 280 ksi) AND exceptional fracture toughness (KIC >=110 MPa root-m) -- approximately 2x the toughness of 300M at equivalent strength. It is the gold-standard alloy for aircraft landing gear, jet engine mounts, and helicopter rotor shafts where catastrophic brittle fracture cannot be tolerated. Shanghai Hangbo Alloy Group supplies AerMet 100 as round bars and forgings.
Industry Pain Point: The fatal crash of United Airlines Flight 232 (Sioux City, 1989) was caused by a metallurgical failure in the fan disk -- a fatigue crack that propagated to critical size in a material with insufficient damage tolerance. AerMet 100 was developed in direct response to the Air Force's demand for a landing gear steel that would tolerate larger critical flaw sizes and provide more inspection intervals between crack initiation and catastrophic failure. With KIC >=110 MPa root-m -- approximately 2x 300M -- AerMet 100 delivers the damage tolerance that conventional ultra-high-strength steels cannot.
Key Properties
| Property | Value |
|---|---|
| UNS | K92580 |
| Alloy Family | Co-Ni Secondary-Hardening Steel |
| Density | 7.89 g/cm3 (0.285 lb/in3) |
| Tensile (Peak Aged) | >= 1930 MPa (>= 280 ksi) |
| Yield 0.2% (Peak Aged) | >= 1689 MPa (>= 245 ksi) |
| Elongation (Peak Aged) | >= 10% |
| Fracture Toughness KIC | >= 110 MPa root-m (>= 100 ksi root-in) |
| Hardness | 52-55 HRC |
| Key Standards | AMS 6532, AMS 6536, MMPDS-15 |
Product Overview
AerMet 100 is a Co-Ni-Cr-Mo secondary-hardening martensitic steel that represents a paradigm shift in ultra-high-strength metallurgy. Unlike conventional quench-and-temper steels (4340, 300M) that sacrifice toughness for strength, or maraging steels (18Ni250) that achieve good toughness but at lower strength, AerMet 100 simultaneously achieves extreme strength AND extreme toughness through a unique hardening mechanism.
The alloy contains 13.4% cobalt and 11.1% nickel, creating a highly dislocated lath martensite matrix. During aging at 482C (900F), extremely fine M2C carbide needles (approximately 2-5 nm diameter, 20-30 nm length) precipitate on the dense dislocation network. These carbides provide secondary hardening while the cobalt raises the M2C solvus, stabilizing the fine carbide dispersion against coarsening. The result is a microstructure that resists both plastic deformation (high strength) and crack propagation (high toughness).
AerMet 100 vs. 300M (the landing gear standard):
- Strength: ~1930 MPa (AerMet 100) vs ~1930 MPa (300M) -- comparable.
- Fracture toughness: KIC >=110 vs ~55-65 MPa root-m -- 2x advantage.
- Stress-corrosion cracking resistance: KISCC >=34 MPa root-m vs ~17 -- 2x advantage in chloride environments.
- Fatigue life: 2-3x longer in component-level testing at equivalent stress.
Chemical Composition (wt.%)
| Element | Content |
|---|---|
| Cobalt (Co) | 13.25-13.55 |
| Nickel (Ni) | 11.00-11.30 |
| Chromium (Cr) | 2.90-3.10 |
| Molybdenum (Mo) | 1.10-1.20 |
| Carbon (C) | 0.21-0.25 |
| Iron (Fe) | Balance |
Heat Treatment
Austenitize: 885+/-14C (1625+/-25F), 1 hour, air cool or oil quench to room temperature.
Sub-Zero Treatment: Cool to -73C (-100F), hold >=1 hour, warm in air. This transforms retained austenite to martensite.
Age (Secondary Hardening): 482+/-6C (900+/-10F), 5-8 hours, air cool. This precipitates the nano-scale M2C carbides that provide the unique strength-toughness combination.
Mechanical Properties
| Condition | Tensile (MPa) | Yield (MPa) | Elongation (%) | KIC (MPa root-m) |
|---|---|---|---|---|
| Peak Aged (482C) | >= 1930 | >= 1689 | >= 10 | >= 110 |
| Over-Aged (496C) | >= 1862 | >= 1620 | >= 12 | >= 126 |
Applications
| Industry | Component |
|---|---|
| Aerospace Landing Gear | Main landing gear cylinders, pistons, axle beams |
| Jet Engines | Engine mounts, thrust links, arrestor hooks |
| Helicopter | Rotor shafts, mast assemblies |
| Motorsport | Driveshafts, gear sets, suspension links |
FAQ
Q1: AerMet 100 vs 300M? Same strength, 2x fracture toughness, 2x SCC resistance, 2-3x fatigue life. AerMet 100 costs more but provides unmatched damage tolerance.
Q2: AerMet 100 vs maraging steel? AerMet 100 is stronger (1930 vs 1725 MPa for 18Ni250) with higher toughness. Maraging is easier to weld and has near-zero quench distortion.
Q3: Price? $80-150/kg EXW. Premium material. Contact sales@hangboalloy.com.
Q4: Requires sub-zero treatment? Yes. -73C treatment converts retained austenite to martensite. Skipping this step drops tensile strength ~100 MPa.
Q5: Forms? Round bars (12-300 mm), forgings, billet. AMS 6532 certified. SGS available.
Contact & Complete Product Range
Shanghai Hangbo Alloy Group Co., Ltd. - China Supplier
Email: sales@hangboalloy.com | WhatsApp (Lisa): +86 13611656360 | www.nickel-alloy.com
All Grades
Ni: NI200, NI201, N4, N5, N6 | Monel: 400-404, K-500 | Inconel: 600-725 | Incoloy: 800-A286 | Hastelloy: C-276-N | Nimonic: 75-263 | Haynes: 25-556 | Precision: 1J22-4J45 | High-Strength: 18Ni250-300, AerMet100, PH13-8Mo | Specialty: Alloy 20-254SMO
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