Custom 450 Stainless Steel Strip (UNS S45000, ASTM A564)
Product Introduction
As a purchasing professional, when you encounter a material like Custom 450, it means you're dealing with a challenging requirement: needing the corrosion resistance of stainless steel, but with strength requirements far exceeding those of 304/316, and without the possibility of complex work hardening processes.
Custom 450 is a martensitic precipitation-hardening stainless steel. Its core value lies in its unique properties: in its "semi-finished" state (solution annealed), it is relatively soft, making it easy to cold-work through processes such as stamping and bending; after shaping, a simple low-temperature heat treatment (aging) transforms it, almost magically, into a material with strength comparable to high-strength alloy steel, while maintaining the corrosion resistance of stainless steel.
The price level for this type of stainless steel strip is generally between $10 and $25/kg (Important note: The above is an approximate range and is subject to significant fluctuations due to metal futures, condition, exchange rates, and purchase volume. It is for reference only and should not be used as a basis for contracts.) The MOQ is 50-100 kg. Our negotiation points generally focus on: 1. Condition determines price (H900 condition is more expensive than A condition due to additional heat treatment processes and performance testing). 2. Focus on performance consistency (require suppliers to provide performance data for multiple batches to observe the range of variation. Stability is more important than a lower price for a single batch.)
Typical applications
(guiding your purchasing decisions):
Aerospace and Defense: Aircraft fasteners, non-critical engine structural components, missile components.
Chemical and General Machinery: Springs, valve plates, pump parts, and mold inserts requiring high strength and certain corrosion resistance.
Medical Devices: Surgical instrument handles, orthopedic tools (non-implants).
Marine and High-Humidity Environments: High-strength structural components with better corrosion resistance than ordinary carbon steel or low-alloy steel.
Key takeaway: If your client is a mechanical designer, they value its "soft first, then hard" processing characteristics – allowing for complex shapes followed by a simple strengthening process. They are concerned about whether the yield strength and corrosion resistance in the H900 condition are sufficient.
Procurement Specifications and Industry Standards
(How to write a professional request for quotation?)
Based on our past successful experience in procuring custom 450 stainless steel strips, your inquiry must be clear and concise, directly stating the core performance requirements. The following points should be emphasized before communicating with suppliers:
1. Determining Material Standards and Grades:
The stainless steel strip we supply conforms to ASTM A564 / AMS 5620 standards. The commonly used unified grade is UNS S45000.
2. Specifying Specifications and Delivery Condition (Critical Requirements):
Based on global market trends and customer demand data from the past three years, our inventory center supplies stainless steel strips with thicknesses ranging from 0.02mm to 16.0mm and widths from 5mm to 3000mm. The length can be cut to any length according to your requirements. You can provide us with the specific dimensions: thickness x width x length (coil or sheet). The thickness tolerance of the strip is generally critical.
Delivery Condition: Must be specified in capital letters, for example: Condition A (Solution Annealed) or Condition H900 (Aged).
3. Core Performance Requirements (Technical Agreement Core):
Mechanical Properties: Specify the minimum guaranteed values for tensile/yield strength and the hardness range based on the selected delivery condition.
Additional Corrosion Resistance Requirements (if needed): A "salt spray test (ASTM B117)" can be requested, specifying the number of hours (e.g., ≥96 hours without significant red rust).
4. Special Requirements (Optional):
Surface Finish: 2B (cold rolled bright), BA (bright annealed), or No.1 (hot rolled pickled). A BA surface is usually required for precision stamping.
Flatness: Strict control of camber and edge waviness.
Packaging: Anti-rust packaging (oiled or VCI anti-rust paper).
Based on past procurement experiences and lessons learned, Lork Group's golden advice is to first clarify the specifications with the designer (this is the top priority before procurement). Secondly, review the supplier's heat treatment capabilities (if purchasing H900 condition material, assess the temperature uniformity of their aging furnace). Finally, and most importantly, conduct initial sample verification (for the first collaboration, purchase A-condition strip material, perform aging yourself or through a third party, and then test the final performance to verify the feasibility of the entire process chain).
Processing difficulty and key points
(Understanding the quotation and delivery time)
Determine your next manufacturing steps based on the three different delivery conditions of the custom 450 stainless steel strips.
1. Excellent machinability in the A condition:
In the solution-annealed state, it has low hardness and excellent cold forming properties, similar to 304 stainless steel, allowing for complex stamping and drawing. This is a major advantage.
2. Simple but critical aging heat treatment:
Aging at around 480°C for 1-4 hours (depending on thickness), followed by air cooling. Temperature and time must be precisely controlled, the performance will be unstable. A heat treatment furnace with a temperature recorder is recommended.
3. Processing limitations in the H900 condition:
If you purchase the H900 condition strip, it is already very hard and brittle. Only limited processing, such as grinding and electrical discharge machining (EDM)is possible. Any attempt at cold bending or stamping is strictly prohibited, as it will cause cracking.
4. One-stop service recommendation:
If your parts require "stamping + age hardening," we strongly recommend finding a supplier that can provide a full-process service, including "strip supply + precision stamping + age heat treatment" (for example, entrusting Lork Group to handle this supply chain management service for you). This will avoid the problems of heat treatment deformation and uneven performance that you might encounter if you handle these processes yourself.
For more information, please contact:
Email: susan@lorkgroup.com
WhatsApp: +86 19937075488
Chemical Composition
(According to ASTM A564/AMS 5620)
| Weight% | Typical value % |
| Ni | 5.00 - 7.00% |
| Cr | 14.00 - 16.00% |
| Cu | 1.25 - 1.75% |
| Mo | 0.50 - 1.00% |
| Fe | Bal |
Mechanical Properties
(Depending on the condition, this must be specified at the time of purchase.)
| Condition | State A | H900 status | H1150 status |
| Parameters | Solution annealing | Aging at 480°C | Over-aging at 580°C |
| Tensile Strength | ≥ 860 MPa | ≥ 1380 MPa | ≥ 1000 MPa |
| Yield Strength (0.2%) | ≥ 690 MPa | ≥ 1240 MPa | ≥ 860 MPa |
| Typical Hardness | HRC 20-28 | HRC 40-46 | HRC 30-38 |
Main uses and purchasing tips:
- State A: The material is purchased in strip form for subsequent cold forming. It is relatively soft and suitable for stamping and bending.
- H900 status: The procurement requires the direct use of high-strength finished strip or parts. They are already hardened and difficult to form.
- H1150 status: A balance of high strength and toughness, resulting in better resistance to stress corrosion.
Purchasing considerations: You must clearly specify the delivery condition of the strip material. Do you require "Condition A" material for further processing and heat treatment yourself? Or do you require the supplier to provide finished products in "H900 condition"? The price, application, and processing methods differ significantly between the two options.
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