15-5PH Stainless Steel Supplier | UNS S15500 Plate & Bar Stock

15-5 PH Stainless Steel – High Toughness PH Grade

Huaxiao Metal supplies 15-5PH stainless steel for aerospace and high-performance applications.

✔ Improved toughness vs 17-4PH
✔ Stable mechanical properties
✔ Available in plate, bar, forging

Compared with 17-4PH, 15-5PH offers:

better transverse toughness
improved ductility
more uniform microstructure
higher structural reliability
excellent mechanical properties in large cross-sections

Because of these advantages, 15-5PH is widely used in:

aerospace structural parts
landing gear components
high-pressure valve bodies
turbine shafts
nuclear and energy equipment
precision machined industrial parts

The alloy is especially valued in aerospace and critical engineering industries where both high strength and fracture toughness are required.

At Huaxiao Metal, we supply 15-5PH stainless steel in multiple industrial forms with custom machining and export support.

Available Specifications

We provide 15-5 PH in various forms to meet your specific manufacturing needs:

Form	Dimensions	Specifications
Round Bar	Φ 5mm – 500mm	Bright, Polished, Grinding, Black
Narrow Strip & Coil	Thickness: 0.05mm – 3.0mm; Width: 2mm – 600mm	Precision Slitting, Bur free edge
Seamless & Welded Pipe	OD: 6mm – 219mm; WT: 0.5mm – 20mm	Hydrostatic & Eddy Current Tested
Wire & Spring Wire	Diameter: 0.1mm – 15mm	Bright, Soap-coated, Straightened
Forgings & Rings	OD up to 1500mm; Weight up to 5 tons	Custom Drawings, Rough/Proof Machined
Sheet & Plate	Thickness: 0.5mm – 100mm	No.1, 2B, Polished

Global Standards Compliance

Our materials strictly adhere to:

Bars/Forgings: ASTM A564, AMS 5659, ASME SA564
Strip/Sheet: ASTM A693, AMS 5604
Pipe/Tube: ASTM A632, AMS 5556
Quality Management: ISO 9001:2015 Certified

Standard Export Packaging

waterproof packing
export wooden cases
anti-rust protection
seaworthy packaging

Typical Applications of 15-5PH Stainless Steel

Aerospace: Aircraft components, landing gear, and engine mounts.
Oil & Gas: High-pressure valves, shafts, and offshore platform equipment.
Nuclear Power: Critical structural support and fasteners.
Chemical Processing: Mixers and reactors requiring high strength and corrosion resistance.

Main Advantages of 15-5PH Stainless Steel

Superior Toughness Compared with 17-4PH

One of the biggest advantages of 15-5PH is its improved transverse toughness and ductility.

This is especially important for:

thick forgings
aerospace structures
multi-directional loading systems

Excellent Structural Reliability

The cleaner microstructure and reduced delta ferrite improve long-term reliability.

This helps reduce:

crack initiation
brittle fracture risk
structural inconsistency

High Strength

15-5PH provides extremely high tensile and yield strength after aging treatment.

This allows engineers to:

reduce weight
improve structural performance
increase fatigue resistance

Good Corrosion Resistance

15-5PH performs well in:

industrial environments
oil & gas systems
marine atmospheres
chemical processing equipment

Excellent Machinability

Compared with many ultra-high-strength alloys, 15-5PH offers relatively good machinability for precision CNC manufacturing.

15-5PH Stainless Steel Chemical Composition

Element	Content (%)
Chromium (Cr)	14.0 – 15.5
Nickel (Ni)	3.5 – 5.5
Copper (Cu)	2.5 – 4.5
Niobium (Nb)	0.15 – 0.45
Carbon (C)	≤0.07

The controlled chemistry helps improve toughness and microstructural consistency compared with standard 17-4PH.

15-5PH Stainless Steel Equivalent Grades

Standard	Grade
UNS	S15500
ASTM	XM-12
EN	1.4545
AMS	AMS 5659 / AMS 5862
DIN	X5CrNiCu15-5

15-5 PH Stainless Steel Mechanical Properties

Typical Mechanical Properties (H900)

Property	Value
Tensile Strength	1310 MPa
Yield Strength	1170 MPa
Hardness	HRC 40–47
Elongation	10%

Typical Mechanical Properties (H1025)

Property	Value
Tensile Strength	1070 MPa
Yield Strength	1000 MPa
Hardness	HRC 35
Elongation	12%

15-5PH is highly valued because it maintains excellent toughness while still achieving very high strength.

15-5PH vs 17-4PH Stainless Steel

Property	17-4PH	15-5PH
Strength	Very High	Very High
Toughness	Good	Better
Ductility	Medium	Higher
Structural Reliability	Good	Excellent
Aerospace Use	Common	Premium

Choose 15-5PH when:

fracture toughness is critical
aerospace reliability is required
thick-section forgings are involved

Choose 17-4PH when:

general industrial strength is sufficient
lower material cost is preferred

Why Choose Huaxiao Metal as Your 15-5PH Supplier?

We don’t just promise quality; we back it up with a track record of industrial excellence.

15+ Years of Export Expertise: Deep experience serving the South American, European, and Southeast Asian markets with zero quality disputes.
1,000+ Tons Constant Stock: We maintain a massive inventory of 17-4 PH, 15-5 PH, and 17-7 PH (Bars, Plates, Strips) for immediate global shipping.
100% Traceability: Every shipment is accompanied by an EN 10204 3.1 MTC and 100% Ultrasonic Testing (UT) results.
24-Hour Response: Our technical sales team provides formal quotations and material consultation within 12-24 hours.
One-Stop Customization: From raw forging to precision CNC machining, we reduce your procurement chain by 30%.
0% Rust Risk: Professional seaworthy packaging with heavy-duty anti-rust oil and fumigated wooden cases for long-distance ocean transit.

FAQ – 15-5PH Stainless Steel Supplier

Does 15-5 PH require pre-heating before welding?

Generally, no. 15-5 PH has excellent weldability and can be welded using common methods like TIG or MIG. However, post-weld heat treatment is recommended to achieve optimal mechanical properties.

Can you provide 15-5 PH with Ultrasonic Testing (UT)?

Yes. We provide 100% UT testing (Standard: ASTM A388 or EN 10228) for all our forgings and bars to ensure internal integrity, especially for aerospace and high-pressure parts.

What is the delivery lead time for custom 15-5 PH shafts?

For standard stock bars, we ship within 3-5 days. For custom forged and CNC machined shafts, the lead time is typically 15-25 days depending on the heat treatment requirements.