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S41500 (ASTM A240 Type 415) Stainless Steel Plate High Strength & Excellent Weldability for Turbine Applications
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xProduct Details
| Products | Stainless Steel Plate | Grade | 415 |
|---|---|---|---|
| Thickness | 1.5-50.0mm | Tech | Cold Rolled,hot Rolled , Forged |
| Width | 1000mm 1219mm 1500mm Or Customs As Request | Surface | 2B NO.1 |
| Standard | ASTM GB JIS EN DIN | MOQ | 1 Ton |
Product Description
S41500 (ASTM A240 Type 415) Stainless Steel Plate High Strength & Excellent Weldability for Turbine Applications
Stainless Steel Plate Specifications
| Name | 415 stainless steel Plate |
| Our Grade |
200 Series: 201 202 300 Series: 301 304,304L,304H,309S,310S,314,316L,316Ti,316H,316LN,317L,321,329,347 400 Series: 409L,410,410S,415,416,420,430,431,436L.439,441,443,444,445,446 Super Stainless Steel: 904L,926,254SMO,654SMO,15-5PH,17-4PH,17-7PH.etc Nickel Alloy: C276, C22,G35,Alloy X,Monel 400,K500,Inconel 600,601,617,625,718,Incoloy 800,800H,800HT,825.etc |
| Technique | Hot Rolled, Cold Rolled,Forged |
| Standard | JIS, AISI, ASTM, DIN, TUV, BV, SUS, etc |
| Thickness | 0.1 – 80.0mm |
| Width range | 10mm – 2000mm |
| Length | Customized |
| Finish | 2B, BA, No.4, 8k, Brushed,Hairline,PVD Coating,Sandblasted |
| Service | Laser Cutting, Bending |
| Sample | Available |
S41500 (ASTM A240 Type 415) Stainless Steel Plate – High Strength & Excellent Weldability for Turbine Applications
Introduction
S41500, commonly designated as ASTM A240 Type 415 stainless steel, is a low-carbon martensitic stainless steel specifically engineered for applications demanding a superior balance of high mechanical strength, good ductility, and excellent weldability. With its optimized composition—featuring controlled carbon content and strategic additions of nickel and molybdenum—S41500 delivers enhanced toughness and corrosion resistance compared to standard martensitic grades like 410 or 420.
This alloy is widely recognized in the power generation industry, particularly for hydroelectric turbine components, where reliability under cyclic stress, exposure to freshwater, and long service life are critical. At [Your Company Name], we supply certified S41500 stainless steel plates conforming to ASTM A240/A240M, available in both hot-rolled and forged conditions, with custom cutting and machining services to meet exact engineering requirements.
Why S41500 for Turbine Applications?
Hydro turbines operate in demanding environments: constant water exposure, high rotational speeds, and dynamic loads. S41500 excels here due to:
- High yield and tensile strength after heat treatment (typically H1025 or H1150)
- Low carbon content (≤0.06%), minimizing weld cracking and enabling post-weld use without immediate re-heat treatment in many cases
- Good resistance to cavitation erosion and stress corrosion cracking (SCC) in freshwater systems
- Proven track record in runner blades, shafts, guide vanes, and other critical rotating parts
Unlike austenitic steels, S41500 can be precipitation-hardened to achieve strength levels unattainable with 304 or 316, while maintaining better machinability and lower material cost.
Chemical Composition (ASTM A240 Type 415 / UNS S41500)
| Element | Typical Range (%) | Max/Min per ASTM A240 |
|---|---|---|
| Carbon (C) | ≤ 0.06 | Max 0.06 |
| Manganese (Mn) | 0.50 – 1.00 | Max 1.00 |
| Silicon (Si) | ≤ 0.60 | Max 0.60 |
| Chromium (Cr) | 11.5 – 14.0 | — |
| Nickel (Ni) | 3.5 – 5.5 | — |
| Molybdenum (Mo) | 0.50 – 1.00 | — |
| Phosphorus (P) | ≤ 0.030 | Max 0.030 |
| Sulfur (S) | ≤ 0.030 | Max 0.030 |
Note: S41500 is often confused with CA6NM (UNS J91540), but they are closely related—CA6NM is typically cast, while S41500 refers to wrought plate per ASTM A240. In practice, their properties and applications overlap significantly.
Mechanical Properties (After Heat Treatment – H1025 Condition)
| Property | Minimum Value |
|---|---|
| Tensile Strength | 790 MPa (115 ksi) |
| Yield Strength (0.2% offset) | 620 MPa (90 ksi) |
| Elongation | ≥ 15% |
| Reduction of Area | ≥ 45% |
| Hardness | 28–34 HRC |
| Charpy V-Notch Impact (–20°C) | ≥ 47 J (35 ft·lbf) |
Heat treatment options include:
- H1025: 550°C (1025°F) for optimal strength-toughness balance
- H1150D: Dual tempering at 620°C for maximum toughness in sour or low-temp service
Product Specifications & Capabilities
We offer S41500 stainless steel plates tailored to your project needs:
| Parameter | Details |
|---|---|
| Standard | ASTM A240/A240M Type 415 |
| UNS Number | S41500 |
| Common Equivalents | F6NM (cast), CA6NM (cast variant), 1.4313 (EN), X3CrNiMo13-4 |
| Form | Hot-rolled plate, forged plate, precision-cut blanks |
| Thickness Range | 6 mm – 150 mm (standard); up to 500 mm via forging |
| Width x Length | Up to 3000 mm x 12000 mm (custom sizes available) |
| Surface Finish | As-rolled, pickled, 2B, or machined |
| Testing & Certification | EN 10204 3.1 MTR, PMI, Ultrasonic Testing (UT) per ASTM A435, Charpy impact reports |
| Custom Services | Laser/waterjet cutting, CNC milling, drilling, beveling, surface grinding |
All plates are produced in ISO 9001-certified mills and undergo rigorous quality control to ensure consistency for mission-critical turbine components.
Key Advantages Over Competing Grades
| Feature | S41500 (Type 415) | 410 Stainless Steel | 316L Austenitic |
|---|---|---|---|
| Strength (UTS) | ～790 MPa | ～520 MPa | ～515 MPa |
| Weldability | Excellent (low carbon) | Poor (prone to cracking) | Excellent |
| Corrosion Resistance | Good in freshwater | Moderate | Excellent (chlorides) |
| Cost | Moderate | Low | High |
| Toughness at –20°C | High (≥47 J) | Low | Very High |
S41500 strikes the ideal balance for hydro turbines: stronger than 316L, more weldable than 410, and more cost-effective than super duplex or nickel alloys.
Typical Applications
- Hydroelectric Power Plants: Runner blades, crown rings, stay vanes, shafts
- Pump Components: Impellers, casings in freshwater or mildly aggressive media
- Marine Propulsion Systems: Shafts and hubs requiring high fatigue resistance
- Valve Bodies & Stems in oil, gas, and water infrastructure
- Heavy Machinery: Wear plates and structural parts needing high strength + moderate corrosion resistance
Ordering Guidance
When specifying S41500 plates for turbine use, consider the following:
- Heat Treatment Condition: Specify H1025 for general use; H1150D for low-temperature or high-toughness needs.
- Ultrasonic Testing: Mandatory for thick sections (>50 mm) per IEC 60303 or customer-specific standards.
- Welding Procedure: Use low-hydrogen electrodes (e.g., ENiCrFe-3) and preheat to 150–200°C; PWHT recommended for critical joints.
- Dimensional Tolerances: EN 10029 Class A or tighter for precision fit-up.
Frequently Asked Questions (FAQ)
Q: Is S41500 the same as CA6NM?
A: Nearly identical in composition and performance. CA6NM (J91540) is the cast version (per ASTM A743/A744), while S41500 is the wrought plate grade (ASTM A240). For forged or rolled plate, S41500 is the correct designation.
A: Nearly identical in composition and performance. CA6NM (J91540) is the cast version (per ASTM A743/A744), while S41500 is the wrought plate grade (ASTM A240). For forged or rolled plate, S41500 is the correct designation.
Q: Can S41500 be used in seawater?
A: Not recommended for long-term seawater exposure due to risk of pitting. Use super austenitic (e.g., 904L) or duplex (2507) grades instead.
A: Not recommended for long-term seawater exposure due to risk of pitting. Use super austenitic (e.g., 904L) or duplex (2507) grades instead.
Q: Do you provide material certified to NACE MR0175?
A: Yes—when supplied in H1150D condition with hardness ≤22 HRC, S41500 meets NACE requirements for sour service.
A: Yes—when supplied in H1150D condition with hardness ≤22 HRC, S41500 meets NACE requirements for sour service.
Q: What’s the lead time for custom-cut turbine plates?
A: Typically 7–14 days from order confirmation, including testing and certification.
A: Typically 7–14 days from order confirmation, including testing and certification.
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