13-8 Mo Stainless Steel Bar, Plate & Forging Supplier
AMS 5629 / UNS S13800 / 1.4534 High-Strength PH Stainless Steel
Huaxiao Metal supplies high-performance 13-8 Mo stainless steel for aerospace, defense, energy, petrochemical, and precision engineering applications.
13-8 Mo (UNS S13800) is a precipitation hardening martensitic stainless steel that combines:
- Extremely high strength
- Excellent toughness
- Superior corrosion resistance
- Outstanding fatigue performance
- Excellent dimensional stability after heat treatment
Compared with traditional PH stainless steels like 17-4PH, 13-8 Mo provides improved toughness and more stable mechanical performance in demanding environments.
Available Product Forms
As a professional China-based manufacturer with 15+ years of experience, Huaxiao Metal provides 13-8 Mo (AISI 632) in various forms and conditions.
| Form | Thickness/Diameter Range | Surface Finish |
| Round Bar | 6.0mm – 450mm | Bright, Peeled, Polished, Black |
| Plate/Sheet | 0.5mm – 100mm | No.1, 2B, BA, Brushing |
| Forgings | Custom Sizes (up to 10 tons) | Rough Machined, Finished |
| Wire/Coil | 0.1mm – 15mm | Bright, Annealed |
Precision Surface Finish Options
We offer a variety of surface treatments to meet the specific requirements of aerospace, automotive, and industrial applications.
No.1 (Hot Rolled): Annealed and descaled, suitable for structural components where a smooth finish is not required.
2B (Cold Rolled): A smooth, moderately reflective finish ideal for further processing or general industrial use.
Bright (Polished/BA): High-reflectivity finish achieved through bright annealing or mechanical polishing, perfect for precision parts.
Peeled & Centerless Ground: Provides extremely tight diameter tolerances and a superior finish for high-speed machining applications.
Rigorous Quality Control
As a manufacturer with 15+ years of export experience, quality is our core priority. Every shipment undergoes a multi-stage inspection process to ensure compliance with ASTM, AMS, and MIL standards.
Chemical Analysis: Verification of alloy composition (e.g., Cr, Ni, Mo, Al) via Spectrometer.
Mechanical Testing: Comprehensive evaluation of Tensile Strength, Yield Strength, Elongation, and Hardness (HRC/HB).
Non-Destructive Testing (NDT): Ultrasonic Testing (UT) and Eddy Current Testing to ensure zero internal defects.
MTR Certification: Full Mill Test Reports (EN 10204 3.1) are provided with every order to ensure 100% traceability.
Third-Party Inspection: We fully support inspections by SGS, BV, TUV, or other designated agencies.
Professional Export Packaging
To ensure your materials arrive in perfect condition despite long-distance sea freight, we employ industry-leading packaging standards.
Anti-Rust Protection: All products are coated with high-grade anti-rust oil and wrapped in waterproof moisture-proof paper.
Secure Bundling: Materials are secured with heavy-duty steel strips to prevent shifting during transit.
Reinforced Enclosures: Products are packed in seaworthy reinforced wooden cases or pallets according to export regulations.
Custom Labeling: Every package includes detailed shipping marks, including Heat Number, Size, Weight, and Grade for easy inventory management.
What Is 13-8 Mo Stainless Steel?
13-8 Mo stainless steel is a premium precipitation hardening stainless steel developed for critical aerospace and high-performance engineering applications.
The alloy contains:
- Approximately 13% Chromium
- 8% Nickel
- 2.2% Molybdenum
- Aluminum strengthening elements
This unique composition provides excellent strength, corrosion resistance, and fracture toughness under severe service conditions.
Manufacturing Standards & Equivalents
| Standard | Designation |
| UNS | S13800 |
| ASTM | A564 (Grade XM-13) |
| AMS | 5629 (Bars/Forgings) / 5864 (Plate) |
| Common Name | PH 13-8 Mo, AISI 632 |
Why Choose 13-8 Mo Stainless Steel?
| Feature | Benefit |
|---|---|
| Ultra-High Strength | Suitable for aerospace & structural parts |
| Excellent Toughness | Reliable under dynamic loading |
| Good Corrosion Resistance | Long service life |
| Superior Fatigue Resistance | Ideal for critical components |
| Excellent Dimensional Stability | Reduced distortion after heat treatment |
| Wide Temperature Capability | Performs from cryogenic to elevated temperatures |
| Heat Treatable | Adjustable mechanical properties |
13-8 Mo can operate in temperatures from approximately -200°C to 315°C depending on the condition and application.
Chemical Composition of 13-8 Mo Stainless Steel
| Element | Content (%) |
|---|---|
| Chromium (Cr) | 12.25 – 13.25 |
| Nickel (Ni) | 7.5 – 8.5 |
| Molybdenum (Mo) | 2.0 – 2.5 |
| Aluminum (Al) | 0.90 – 1.35 |
| Carbon (C) | ≤ 0.05 |
| Iron (Fe) | Balance |
Mechanical Properties (Typical in Hardened Conditions)
| Condition | Tensile Strength (Rm) MPa | Yield Strength (Rp0.2) MPa | Elongation (A5) % | Hardness (Rockwell) |
| Annealed (Cond A) | ≤ 1200 | – | ≥ 10 | ≤ 38 HRC |
| H950 | ≥ 1515 | ≥ 1415 | ≥ 10 | ≥ 45 HRC |
| H1000 | ≥ 1415 | ≥ 1310 | ≥ 10 | ≥ 43 HRC |
| H1050 | ≥ 1275 | ≥ 1140 | ≥ 12 | ≥ 40 HRC |
Heat Treatment Conditions
13-8 Mo achieves high strength through precipitation hardening heat treatment.
Common conditions include:
- Solution Annealed
- H950
- H1000
- H1050
- H1100
Different aging temperatures provide different balances between:
- Strength
- Toughness
- Hardness
- Stress corrosion resistance
13-8 Mo Stainless Steel Applications
Aerospace Components
Widely used for:
- Aircraft structural parts
- Landing gear components
- Aerospace fasteners
- Actuator systems
Defense & Military Equipment
Excellent strength and toughness make it suitable for high-performance defense applications.
Petrochemical Equipment
Good corrosion resistance supports harsh industrial environments.
Injection Molding Equipment
Used in precision molds and tooling requiring high strength and wear resistance.
Nuclear & Energy Industry
Suitable for demanding environments requiring stable mechanical performance.
13-8 Mo vs 17-4PH Stainless Steel
| Property | 13-8 Mo | 17-4PH |
|---|---|---|
| Toughness | Better | Good |
| Strength | Higher | High |
| Corrosion Resistance | Excellent | Excellent |
| Dimensional Stability | Superior | Good |
| Aerospace Usage | Extensive | Extensive |
| Stress Corrosion Resistance | Better | Standard |
13-8 Mo is often selected when applications require higher toughness and more stable performance under dynamic loading.
Why Buy from Huaxiao Metal
| Advantage | Details |
|---|---|
| Industry Experience | 15+ Years |
| Export Markets | 60+ Countries |
| Inventory Support | Regular Stock Available |
| Standards | AMS / ASTM / EN |
| Processing Service | Cutting / Forging / Machining |
| Certificates | EN 10204 3.1 MTC |
| Quote Response | Within 6–24 Hours |
| MOQ | Flexible |
FAQ
What forms of 13-8 Mo stainless steel do you supply?
We supply bars, plates, forgings, rings, wire, and customized processed materials.
What standards can you provide?
We support AMS 5629, AMS 5864, UNS S13800, and EN 1.4534 standards.
Is 13-8 Mo suitable for aerospace applications?
Yes. 13-8 Mo is widely used in aerospace structural and high-strength components.
Can you provide custom sizes?
Yes. Customized dimensions and machining services are available.
Do you provide Mill Test Certificates?
Yes. EN 10204 3.1 certificates are available upon request.
What is the heat treatment for 13-8 Mo Condition H950?
The H950 condition refers to aging the solution-treated material at 950°F (510°C) for 4 hours, followed by air cooling, to obtain the maximum tensile strength and hardness.
Is 13-8 Mo stainless steel magnetic?
Yes, in all conditions (including annealed and hardened states), 13-8 Mo is a martensitic alloy and is strongly magnetic.
Can 13-8 Mo be welded?
Yes, it can be welded using inert gas shielded or resistance welding processes. However, to maintain optimal corrosion resistance and strength, post-weld heat treatment is highly recommended.
Request a Quote for 13-8 Mo Stainless Steel
Huaxiao Metal is a professional supplier of:
- 13-8 Mo stainless steel bar
- 13-8 Mo stainless steel plate
- 13-8 Mo forgings
- Aerospace PH stainless steel materials
Contact us now for:
- Latest prices
- Technical support
- Datasheets
- Custom processing solutions
- Fast worldwide delivery
