Project Description
AISI 630, 1.4542 Precipitation Hardening Stainless Steel
Product Description
AISI 630, 1.4542 (also known as 17-4 PH) is a premium martensitic precipitation-hardening stainless steel that combines exceptional strength, good corrosion resistance, and excellent mechanical properties. This versatile alloy features a carefully balanced chemical composition including 15.0-17.0% chromium, 3.0-5.0% nickel, 3.0-5.0% copper, and niobium (columbium) additions that enable significant strengthening through a relatively simple heat treatment process. Unlike conventional stainless steels, AISI 630 can be supplied in a solution-treated condition and subsequently hardened through a low-temperature aging treatment, yielding outstanding mechanical properties while minimizing distortion. This unique combination of high strength, good corrosion resistance, and dimensional stability during heat treatment makes AISI 630, 1.4542 an ideal choice for demanding applications across multiple industries.
Applications
AISI 630, 1.4542 precipitation hardening stainless steel is specifically designed for applications requiring high strength, good corrosion resistance, and excellent mechanical properties. Its primary applications include:
- Aerospace components including landing gear parts, fasteners, and structural elements
- Oil and gas industry equipment such as valve components, pump shafts, and fasteners
- Power generation equipment including turbine blades and components
- Marine hardware and components exposed to saltwater environments
- Food processing equipment requiring high strength and good sanitary properties
- Chemical processing components and reactors
- Medical and surgical instruments
- High-performance shafts, gears, and mechanical components
- Nuclear power plant components
- Firearms components and defense industry applications
The ability to tailor the mechanical properties through various aging heat treatments makes AISI 630, 1.4542 particularly valuable for applications where specific combinations of strength, hardness, and toughness are required.
Standards
AISI 630, 1.4542 precipitation hardening stainless steel complies with the following international standards:
- American Standards: ASTM A564/A564M Type 630, ASTM A693 Type 630, ASTM A479 Type 630
- European Standards: EN 1.4542, EN 10088-3
- ASME: SA-564 Grade 630
- AMS: AMS 5643, AMS 5604
- UNS: S17400
- British Standards: BS 970 Part 4 S17400
- German Standards: DIN 17440 X5CrNiCuNb16-4
- Japanese Standards: JIS SUS 630
- ISO: ISO 683-13 X5CrNiCuNb16-4
Chemical Composition and Grade Comparison
Chemical Composition (in %)
| Element | C | Si | Mn | P | S | Cr | Mo | Ni | Nb | Cu |
|---|---|---|---|---|---|---|---|---|---|---|
| Min | ≤ | ≤ | ≤ | ≤ | ≤ | 15.0 | ≤ | 3.0 | 5 × C | 3.0 |
| Max | 0.07 | 0.50 | 1.50 | 0.030 | 0.030 | 17.0 | 0.60 | 5.0 | 0.45 | 5.0 |
Grade Equivalents
| Standard | Designation |
|---|---|
| UNS | S17400 |
| EN/DIN | 1.4542, X5CrNiCuNb16-4 |
| AISI/SAE | 630, 17-4 PH |
| British | S17400 |
| Japanese | SUS 630 |
Mechanical Properties
AISI 630, 1.4542 offers exceptional mechanical properties that can be tailored through various aging heat treatments:
Mechanical Properties After Age Hardening Heat Treatment According to ASTM A564/A564M
| Condition | H1025 | H1075 | H1100 | H1150 | H1150M | H1150D |
|---|---|---|---|---|---|---|
| Diameter OD range in mm (inch) | ≤ 304.8 (12) | ≤ 304.8 (12) | ≤ 304.8 (12) | ≤ 304.8 (12) | ≤ 304.8 (12) | ≤ 304.8 (12) |
| 0.2%-Offset-Yield Strength Rp0.2 in MPa (ksi) | ≥ 1000 (145) | ≥ 860 (125) | ≥ 795 (115) | ≥ 725 (105) | ≥ 520 (75) | ≥ 725 (105) |
| Tensile Strength Rm in MPa (ksi) | ≥ 1070 (155) | ≥ 1000 (145) | ≥ 965 (140) | ≥ 930 (135) | ≥ 795 (115) | ≥ 860 (125) |
| Elongation L0 = 4 d (A5) in % | ≥ 12 | ≥ 13 | ≥ 14 | ≥ 16 | ≥ 18 | ≥ 16 |
| Reduction of Area (Z) in % | ≥ 45 | ≥ 45 | ≥ 45 | ≥ 50 | ≥ 55 | ≥ 50 |
| Impact Toughness (Charpy-V at 23 °C) in J (ft-lbs) | ≥ 20 (15) | ≥ 27 (20) | ≥ 34 (25) | ≥ 41 (30) | ≥ 75 (55) | ≥ 41 (30) |
| Hardness in BHN (HRC) | ≥ 331 (35) | ≥ 311 (32) | ≥ 302 (32) | ≥ 277 (28) | ≥ 255 (24) | ≥ 255 (24) |
Heat Treatment Conditions
| Condition | Heat Treatment | Typical Applications |
|---|---|---|
| Solution Treated (A) | 1038°C (1900°F), air cool | Starting condition for subsequent aging |
| H1025 | 551°C (1025°F), 4 hours, air cool | Maximum strength and hardness |
| H1075 | 579°C (1075°F), 4 hours, air cool | High strength with improved toughness |
| H1100 | 593°C (1100°F), 4 hours, air cool | Good balance of strength and toughness |
| H1150 | 621°C (1150°F), 4 hours, air cool | Improved toughness, good strength |
| H1150M | 621°C (1150°F), 4 hours, air cool + 551°C (1025°F), 4 hours, air cool | Maximum toughness and ductility |
| H1150D | 621°C (1150°F), 4 hours, air cool (twice) | Enhanced corrosion resistance and toughness |
Available Dimensions
SHUNFU METAL supplies AISI 630, 1.4542 precipitation hardening stainless steel in the following dimensions:
- Round Bars: Diameter range from 6 mm to 300 mm (0.236″ to 12″)
- Flat Bars and Plates: Thickness from 3 mm to 100 mm (0.118″ to 4″)
- Sheets and Strips: Thickness from 0.5 mm to 6 mm (0.02″ to 0.236″)
- Wire: Diameter from 0.1 mm to 12 mm (0.004″ to 0.472″)
- Forgings: According to customer specifications
- Pipes and Tubes: According to relevant industry standards
Materials can be supplied in solution treated (Condition A) or various age-hardened conditions. Custom dimensions and specifications are available upon request to meet specific project requirements.
Corrosion Resistance
AISI 630, 1.4542 precipitation hardening stainless steel offers good corrosion resistance properties:
- General Corrosion: Good resistance to atmospheric corrosion, fresh water, and mild industrial environments. Comparable to Type 304 stainless steel in many environments.
- Stress Corrosion Cracking: Better resistance than austenitic stainless steels like 304 and 316 in chloride environments.
- Pitting and Crevice Corrosion: Moderate resistance to localized corrosion. The H1150 condition typically offers better corrosion resistance than the higher-strength conditions.
- Oxidation Resistance: Good resistance to oxidation at temperatures up to approximately 550°C (1022°F).
- Galvanic Corrosion: Care should be taken when coupling with dissimilar metals in wet environments.
For applications requiring both high strength and maximum corrosion resistance, the double aging treatment (H1150D) is recommended as it provides the best combination of corrosion resistance and mechanical properties.
Why Choose SHUNFU METAL for AISI 630, 1.4542
When sourcing AISI 630, 1.4542 precipitation hardening stainless steel for your critical applications, SHUNFU METAL delivers superior quality and service. Our inventory of AISI 630, 1.4542 meets the most stringent industry standards and undergoes comprehensive quality control to ensure consistent performance across all heat treatment conditions. We understand the importance of proper heat treatment in achieving the desired mechanical properties and provide materials with certified test reports documenting mechanical properties and heat treatment history.
Our technical experts can assist you in selecting the optimal heat treatment condition of AISI 630, 1.4542 for your specific application requirements, ensuring the ideal balance of strength, hardness, toughness, and corrosion resistance. With competitive pricing, reliable global shipping, and responsive customer service, we aim to be your trusted partner for specialty steel solutions.
Contact us today with your AISI 630, 1.4542 requirements. Our team is ready to provide detailed quotations and technical support to help you select the ideal material specification for your critical projects in aerospace, oil and gas, marine engineering, medical, or other demanding industries.
We are committed to integrate steel resources in china and serve the global steel market. Our company has more than 15 years of experience in steel researching, production, managing and sales. And our team mostly are based on and worked in national famous steel enterprise before. In the aspect of resources and information, we have established cooperative relationship with nearly hundred enterprises, either state-owned or private owned in China.
What’s more, we have built long, deep and close business relationship with dozens of steel company, Sharing and holding equities with several steel enterprises. Because of the close cooperation with steel companies and our pioneering spirit, which can ensure us stay at the top competition, and ensure our customers get what they really want. We provide preffesional one-stop service to the Contractors of follows project:
- Oil and Gas Pipeline Construction
- Onshore and Offshore
- Boiler Manufacturers
- Oil Refining Equipment
- Petroleum and Chemical Plant Construction
- Fire Protection
- Heating & Air Conditioning
Our ability to purchase materials directly from leading mills at the best possible price will give you the competitive edge. This coupled with a skilled workforce dedicated to embracing the demands of the markets we serve. Just give us a call +86-731-89903933.
