Titanium Grade 4, Sheet, Coil, Bar, Plate, AMS 4901 (CP Grade 4) - UNS R50700
CP Grade 4 titanium stands out as the strongest of the commercially pure titanium grades, offering an exceptional balance of high strength, corrosion resistance, and biocompatibility. With its higher oxygen content, it delivers significantly greater mechanical strength than Grades 1–3 while still maintaining the lightweight, non‑toxic, and highly corrosion‑resistant nature that makes titanium so valuable. This combination makes Grade 4 a go‑to material for aerospace components, industrial equipment, chemical processing systems, and medical implants that demand durability without sacrificing purity. Its ability to perform reliably in harsh environments—whether exposed to seawater, chemicals, or the human body—has cemented CP Grade 4 titanium as a trusted choice for critical, high‑performance applications.
- Inventory & Specs
- Chemical Composition
- Physical Properties
- Mechanical Properties
- Datasheet
- Additional Info
- FAQs
Inventory Size Ranges for CP Grade 4
| Type | Thickness | AMS Standards | ASTM | UNS | Get a Quote |
|---|---|---|---|---|---|
| Coil | 0.012" - 0.080" | AMS 4901, AMS 4921 | ASTM B 265, ASTM B 348, ASTM F 67 | UNS R50700 | Get a Quote |
| Sheet | 0.012" - 0.080" | AMS 4901, AMS 4921 | ASTM B 265, ASTM B 348, ASTM F 67 | UNS R50700 | Get a Quote |
| Plate | 0.250" - 0.625" | AMS 4901, AMS 4921 | ASTM B 265, ASTM B 348, ASTM F 67 | UNS R50700 | Get a Quote |
Characteristics of CP Grade 4
CP Grade 4 has the highest strength of the CP grades, making it competitive with stainless steels for many corrosion resistant applications. The corrosion resistance of CP Ti - Grade 4 is based on the presence of a stable, continuous, tightly adherent oxide layer that forms spontaneously upon exposure to oxygen. If damaged, it reforms readily as long as there is some source of oxygen in the environment. Its strength is on a par with annealed stainless steels, and, in addition, it offers lighter weight and superior corrosion resistance. CP Ti, Grade 4 is not subject to grain boundary embrittlement or sensitization at elevated temperatures.
Working with CP Grade 4
Heat treatments used for CP Ti are annealing and stress relieving. Annealing is used to fully soften the material and remove all residual stresses. Stress relieving is used to remove some or most of the residual stresses from forming, or to recover compressive yield strength after stretching. CP Grade 4 can be hot and cold worked, machined, and welded.
Other industry standards we comply with:
- ASM/MIL-81200
- DFARS Compliant
Common Trade Names
- Grade 4 Titanium
- Gr. 4 Titanium
- CP 4 Titanium
Industry Applications for CP Grade 4
- Jet Engine Components
- Aerospace Fasteners
- Marine and Chemical Processing and Desalinization Plants
- Corrosive Waste Disposal Wells
- Pulp and Paper Production
Chemical Composition
| Element | Min | Max | |
|---|---|---|---|
| N | Nitrogen | - | 0.05 |
| C | Carbon | - | 0.08 |
| O | Oxygen | - | 0.4 |
| Fe | Iron | - | 0.5 |
| H | Hydrogen | - | 0.015 |
| Ti | Titanium | - | Balance |
| - | Other | - | 0.4 |
Physical Properties
| Property | T (°F) | T (°C) | Value | Value (SI) |
|---|---|---|---|---|
| Density | - | - | 0.1630 lb/in3 | 4.512 g/cm3 |
| Beta Transus | 1715-1765 | 935-653 | - | - |
| Alpha Transus | 1635-1685 | 891-918 | - | - |
| Melting Point (Liquidous) | 3000-3040 | 1649-1671 | - | - |
| Specific Heat | 73 | 23°F | 0.1250 Btu/°F | - |
| Electrical Resistivty | 73 | 23°F | 3.93 μΩ∙in | 0.100 μΩ∙in |
| Modulus of Elasticity | - | - | 15.0 x 103 ksi | 10.3 x 104 MPa |
Mechanical Properties
| Room Temperature Properties | UTS, ksi (MPa) | YS, ksi (MPa) | % EI | % RA |
|---|---|---|---|---|
| Specified Properties | 80 (550) | 70 (480) | 15 | 30 |
| Typical Properties | 95-100 (655-690) | 70-92 (480-635) | 20-25 | 38-51 |
Datasheet
Additional Info
A Brief History of CP Grade 4
Commercially Pure (CP) Grade 4 Titanium represents the highest‑strength grade within the commercially pure titanium family, developed as titanium technology matured in the mid‑20th century. As industries sought lightweight materials capable of withstanding aggressive corrosive environments and higher mechanical loads, CP Grade 4 emerged as a solution that bridged the gap between lower‑strength CP grades and alloyed titanium materials. By offering significantly higher strength while maintaining the corrosion resistance inherent to pure titanium, CP Grade 4 expanded the application range of titanium in industrial, aerospace, medical, and marine environments.
CP Grade 4 became particularly valuable in applications where corrosion resistance and purity were critical, but design requirements demanded higher allowable stresses than those offered by CP Grades 1, 2, or 3.
How CP Grade 4 Was Developed
CP Grade 4 Titanium was developed through tighter control of interstitial elements such as oxygen, nitrogen, and iron, which increases strength while preserving titanium’s natural corrosion resistance. Unlike alloyed titanium grades that rely on aluminum or vanadium to achieve higher strength, CP Grade 4 achieves its mechanical properties through controlled purity and processing, resulting in the highest tensile strength and ASME allowable design stresses of all commercially pure titanium grades.
This approach allowed engineers to take advantage of titanium’s low density and corrosion performance without introducing alloying elements that could impact weldability, corrosion behavior, or biocompatibility. The result is a material that offers superior load‑bearing capability while maintaining excellent fabricability for a wide range of industrial applications.
Early Applications of CP Grade 4
Early adoption of CP Grade 4 Titanium was driven by industries operating in highly corrosive and mechanically demanding environments, where traditional steels and non‑ferrous alloys experienced premature failure. It was widely used in chemical processing equipment such as pressure vessels, piping systems, heat exchangers, and reactors, where higher allowable stress limits enabled more efficient designs.
CP Grade 4 also gained early traction in aerospace and marine applications, where its combination of strength, corrosion resistance, and weight savings supported structural and pressure‑containing components. Its purity and corrosion resistance further enabled use in early medical and biomedical applications.
How CP Grade 4 Is Used Today
Today, CP Grade 4 Titanium is widely specified for applications requiring maximum strength among commercially pure titanium grades, along with outstanding corrosion resistance. Common uses include chemical and petrochemical processing equipment, marine and offshore components, heat exchangers, pressure vessels, aerospace hardware, and medical implants and devices. CP Grade 4 maintains excellent resistance to chlorides, oxidizing environments, and seawater while offering significantly higher strength than CP Grades 2 and 3.
Its biocompatibility supports continued use in medical and dental applications, while its ability to be welded, formed, and machined allows for complex, high‑reliability fabrications. These characteristics make CP Grade 4 an ideal choice where corrosion resistance and mechanical performance must coexist.
Your Trusted Supplier for CP Grade 4
United Performance Metals is a global specialty metals solutions provider offering CP Grade 4 Titanium in a variety of product forms including coil, sheet, and plate to support industrial, aerospace, marine, chemical processing, and medical applications. With extensive titanium expertise, value‑added processing capabilities, and strong certification and traceability support, UPM delivers high‑performance materials tailored to demanding service environments.
Contact our team today to learn how CP Grade 4 Titanium can support your next high‑strength, corrosion‑resistant application.
Product FAQs
CP Grade 4 Titanium is used in applications requiring maximum strength among commercially pure titanium grades along with excellent corrosion resistance. Typical uses include chemical processing equipment, heat exchangers, pressure vessels, marine and offshore components, aerospace hardware, and medical implants where durability, corrosion resistance, and reliability are critical.
CP Grade 4 Titanium is considered biocompatible and is widely used in medical and dental applications such as implants and surgical devices. Its high strength and corrosion resistance, combined with excellent compatibility with the human body, make it well suited for long‑term biomedical use.