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Model No: 13-8 PH
AMS 5629 (13-8 PH) Precipitation Hardening Stainless Steel Bar
13-8 PH stainless that has excellent strength, high hardness, superior toughness and good corrosion resistance. Good transverse toughness properties are achieved by tight chemical composition control, low carbon content, and vacuum melting.
Delivery :
FOB
minimum order :
100 kilograms
Supply Ability :
5000Tonkilograms / Month
Stock Time :
7-10Day
Country of Origin :
CHINA
Quantity :
13-8 PH is a premium-grade martensitic precipitation-hardening stainless steel, part of a distinguished family that includes 17-4 PH and 15-5 PH alloys. Renowned for its exceptional strength, hardness, toughness, and corrosion resistance, this alloy is preferred for critical aerospace, industrial, and molding applications.
Key Properties & Metallurgical Advantages
- Superior Strength & Hardness – Achieves high mechanical properties through low-temperature heat treatment.
- Enhanced Toughness – Tight chemical control, vacuum melting (VIM + VAR/ESR), and low carbon content ensure excellent transverse toughness, even in thick sections.
- Corrosion Resistance – Comparable to 304 stainless steel, with optimal performance in fully hardened conditions.
- Weldability – Compatible with inert gas shielding (helium preferred) for high-integrity joints.
13-8 PH Stainless Steel Chemical Composition
| Symbol | Element | Min % | Max % |
|---|---|---|---|
| C | Carbon | 0.05% | |
| Mn | Manganese | 0.10% | |
| Si | Silicon | 0.10% | |
| P | Phosphorus | 0.010% | |
| S | Sulfur | 0.008% | |
| Cr | Chromium | 12.25% | 13.25% |
| Ni | Nickel | 7.50% | 8.50% |
| Mo | Molybdenum | 2.00% | 2.50% |
| N | Nitrogen | 0.010% | |
| Al | Aluminum | 0.90% | 1.35% |
| Fe | Iron | Balance |
13-8 PH Stainless Steel Mechanical Properties
| Condition | Tensile | Yield 0.2% offset | Elongation (%in 2") | Reduction of Area | Brinell Hardness | Rockwell Hardness |
|---|---|---|---|---|---|---|
| Ann | 175 ksi max | 363 max | ||||
| H950 | 220 ksi | 205 ksi | 10% | 45% | C45 min | |
| H1000 | 205 ksi | 190 ksi | 10% | 50% | C45 min | |
| H1025 | 185 ksi | 175 ksi | 11% | 50% | ||
| H1050 | 175 ksi | 165 ksi | 12% | 50% | C40 min | |
| H1100 | 150 ksi | 135 ksi | 14% | 50% | C34 min | |
| H1150 | 135 ksi | 90 ksi | 14% | 50% | C30 min |
Manufacturing Process: Precision Metallurgy
13-8 PH is produced via double-melting for ultra-high purity:
Vacuum Induction Melting (VIM) – Ensures precise chemistry control.
Secondary Refining – Either Vacuum Arc Remelting (VAR) or Electroslag Remelting (ESR) for enhanced homogeneity and reduced inclusions.
This stringent process guarantees superior ductility and fatigue resistance, making it ideal for:
✔ Aerospace structural components (e.g., landing gear, airframe parts)
✔ Injection molding dies (high-wear resistance)
✔ Oil & gas equipment (corrosion-prone environments)
Available Product Forms
Lork Group supplies 13-8 PH stainless steel in compliance with AMS 5629, including:
- Bar stock (hot-rolled, cold-finished)
- Wire, forgings, rings
- Extrusions, sheet & plate
13-8 PH stainless steel is typically used in the following applications
AMS 5629 (13-8 PH) is ideal for applications where very high strength and toughness are required. This alloy is also used when good general / stress corrosion cracking resistance and minimal property directionality are needed.
Used primarily for parts requiring corrosion resistance, stress-corrosion, and high strength 600°F (316°C), with good ductility and strength in transverse direction for
- Aerospace components
- Injection molding equipment
- Waterjet cutting equipment
- Petrochemical industries
- Nuclear industries
- landing gear components
- shafts
- valves
- fittings
- fasteners
Why Choose Lork Group?
As a trusted supplier of specialty steels, Lork Group ensures:
- Certified traceability – Full mill test reports (MTRs) for each batch.
- Custom processing – Heat treatment, machining, and testing per customer specs.
- Global logistics – Timely delivery to aerospace, energy, and industrial partners.
Contact Lork Group for metal material Solutions
The experts at Lork Group are ready to help you choose the most suitable type of stainless steel for your .
We have built a reputation as a trusted partner for quality materials, distributing numerous grades of stainless steel, nickel alloy, and hard-to-find metals. Our raw metal bars, rings, plates, pipes, and tubing are available from stock.
To learn more about the Lork Group metal difference and our material offerings stainless steel and inconel alloy, contact us or request a quote today.
