17-7PH Stainless Steel Strip
Precision 17-7PH Stainless Steel Strip: Ultra-High Strength & Corrosion-Resistant Alloy for Critical Applications
17-7PH Stainless Steel Strip (UNS S17700, EN 1.4568, ASTM A693) is a semi-austenitic precipitation hardening alloy engineered for exceptional strength-to-weight ratios and moderate corrosion resistance.
Combining chromium (16.0–18.0%), nickel (6.5–7.75%), and aluminum (0.75–1.50%), this alloy achieves tensile strengths up to 1,650 MPa after aging treatments while retaining formability in its annealed state.
Its unique phase-transformation capability—from austenitic (machinable) to martensitic (high-strength)—makes it ideal for aerospace springs, medical implants, and precision electronics
Key Specifications & Properties
Dimensions & Tolerances
- Thickness: 0.03–1.5 mm (ultra-thin precision strips for micro-components).
- Width: 2.0–300 mm (slit-edge, mill-edge, or deburred custom edges).
- Form: Coils, sheets, or cut-to-length strips.
Mechanical Properties by Condition
Performance Advantages
- Ultra-High Strength: Aging treatments (e.g., RH950/TH1050) boost tensile strength to 1,650 MPa—ideal for springs, clips, and structural reinforcements.
- Corrosion Resistance: Exceeds standard martensitic grades, resisting oxidation, organic acids, and atmospheric erosion (use limit: 600°F/316°C).
- Formability: Austenitic state (Condition A) allows deep drawing, bending, and stamping (elongation ≥20%).
- Minimal Distortion: Low-temperature aging preserves dimensional stability for precision parts.
- Fatigue Resistance: Critical for aerospace components like aircraft bulkheads and honeycomb panels.
Industry Applications
- Aerospace: Seat tracks, retaining rings, engine brackets, satellite components
- Medical: Surgical tools, implants (biocompatible), orthopedic devices.
- Electronics: Connectors, battery contacts, shielding components.
- Automotive: Fuel system springs, exhaust valves, sensors.
Quality Assurance & Compliance
- Standards: ASTM A564, AMS 5528, AMS 5678, EN 10088-2.
- Certifications: ISO 9001, RoHS.
- Testing: Chemical analysis, tensile/hardness tests, surface defect inspection.
Our Strict Quality Management System
We follow a comprehensive quality management system, covering raw material procurement and production processes. Each batch of products undergoes rigorous testing and control to meet high–quality standards.
Thickness Insprction
Width Inspection
Surface Inspection
Camber Inspection
Chemical Testing
Tensile Test
Bending Test
Edge Deburred
Narrow Strip Packaging
Strip Coils Packaging
Why choose us
Discover Our Advantages
Premium-grade precision strip, engineered to meet the exacting specifications.
We have a professional technical team that provides all-around support and services. We help customers solve problems including product selection, and technical consultation.
100 kg
Small MOQ
0.01-1.5 mm
Large Inventory
7-15 Days
Fast Delivery
+-0.005 mm
Tightest Tolerance
Advanced Manufacturing Processes
Our production facilities are equipped with state-of-the-art equipment and cutting-edge technologies that enable us to produce stainless steel strips with unparalleled precision.
Raw Materials: High-Quality Foundation Laying the Cornerstone of Quality
Partnering with leading steel producers like Tisco, we ensure a stable supply of high-quality raw materials for our manufacturing process.
These raw materials strictly control the composition ratio to ensure the precise content of key elements such as chromium and nickel, endowing the stainless steel strip with excellent corrosion resistance and mechanical properties in subsequent processing.
Cold Rolling: Plastic Deformation to Shape Precise Thickness
With high-precision cold rolling equipment, the stainless steel is rolled at room temperature.
Through the pressure of the rolling mill rolls, the material undergoes plastic deformation, gradually rolling the thickness to the target size.
This step not only compresses the thickness but also refines the internal grains, improving the material strength and surface flatness, laying a solid foundation for subsequent processing.
Bright Annealing: Optimizing Structure to Endow a Bright Surface
Bright annealing is a key process for improving the quality of precision stainless steel strips.
Its main purpose is to eliminate the internal stresses and work hardening caused by cold rolling, improve the strip’s microstructure and mechanical properties, and obtain a bright surface.
The bright annealing process is carried out in a bright annealing furnace, which provides a protective atmosphere to prevent oxidation of the strip during heating.
Degreasing: Removing Impurities to Restore a Pure Surface
After cold rolling, the surface of the strip will retain impurities such as rolling oil and iron filings.
The cleaning process uses professional degreasers and cleaning techniques. Through processes such as spraying, brushing, and rinsing, oil and debris are thoroughly removed, restoring the stainless steel strip’s surface to purity.
A clean surface is a key prerequisite for ensuring the effect of subsequent heat treatment and improving the product’s appearance and performance.
Tension Leveling: Precise Shaping to Eliminate Shape Defects
Leveling is an important process for improving the flatness of precision stainless steel strips.
During cold rolling and annealing, the strip may develop defects such as warping and waves, which affect its dimensional accuracy and usage performance.
The leveling process uses a leveling machine to apply appropriate bending and stretching to the strip, correcting its shape and improving its flatness.
Precision Slitting: Custom Cutting to Meet Diverse Needs
With high-precision slitting equipment, the strip is cut into narrow strips of different widths.
The slitting process strictly controls the cutting accuracy to ensure smooth cuts without burrs, making the width tolerance of each narrow strip extremely small to meet the diversified needs of industries such as electronics and precision machinery for different specifications.
Edge condition: Fine Processing to Improve Edge Quality
Edging is a crucial step following slitting.
During slitting, the edges of the strips may become rough or produce burrs, which affect the surface quality and usage performance of the precision stainless steel strips.
The edging process uses specialized edging equipment to grind and polish the edges of the strips, achieving smooth and burr – free edges.
Cutting into Sheets: Custom Sizing for Ready-to-Use Finished Products
Cutting is the process of cutting the precision stainless steel strips to the desired length according to customer requirements.
Common cutting methods include shear cutting and laser cutting.
Shear cutting is a mechanical cutting method that uses shears to cut the strip into specified lengths. Its advantages include high cutting speed and low cost.
Packaging: Protective Transportation to Ensure Quality Delivery
Packaging is the final step in the production of precision stainless steel strips.
Its primary purpose is to protect the strips from damage, corrosion and contamination during transportation and storage.
The packaging process involves cleaning the strips’ surfaces, applying protective films, wrapping with packaging materials and securing with strapping or pallets.
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