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S41500 Stainless Steel Plate F6MN SS Plate Optimized for Hydroelectric and Power Generation Components
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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 Stainless Steel Plate F6MN SS Plate Optimized for Hydroelectric and Power Generation Components
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 |
Overview
S41500 stainless steel—commonly referenced in casting form as F6NM—is a low-carbon, nickel- and molybdenum-enhanced martensitic stainless steel specifically engineered for high-performance applications in hydroelectric turbines, power generation systems, and other critical rotating equipment. While S41500 denotes the wrought plate grade per ASTM A240, F6NM refers to its cast counterpart under ASTM A743/A744. Despite this distinction, both share nearly identical chemistry and mechanical behavior, making S41500 plate the ideal choice for forged or rolled components requiring superior strength, toughness, and resistance to cavitation and corrosion in freshwater environments.
At [Your Company Name], we supply certified S41500 (F6NM-equivalent) stainless steel plates in hot-rolled and forged conditions, with precision cutting, machining, and full material traceability to support OEMs and engineering firms in the energy sector worldwide.
Why S41500/F6NM for Hydro & Power Applications?
Hydroelectric turbines operate under extreme mechanical stress, cyclic loading, and continuous exposure to water—conditions that demand materials with:
- High yield and tensile strength to resist deformation
- Excellent impact toughness at ambient and low temperatures
- Good resistance to cavitation erosion and stress corrosion cracking (SCC)
- Weldability for repair and fabrication without extensive pre/post-heat treatment
S41500 delivers all four—outperforming standard martensitic grades like 410 and offering a more cost-effective alternative to super duplex or nickel-based alloys.
Chemical Composition (UNS S41500 / ASTM A240 Type 415)
| Element | Typical Range (%) | ASTM A240 Max/Min |
|---|---|---|
| Carbon (C) | ≤ 0.06 | Max 0.06 |
| Chromium (Cr) | 11.5 – 14.0 | — |
| Nickel (Ni) | 3.5 – 5.5 | — |
| Molybdenum (Mo) | 0.50 – 1.00 | — |
| Manganese (Mn) | 0.50 – 1.00 | Max 1.00 |
| Silicon (Si) | ≤ 0.60 | Max 0.60 |
| Phosphorus (P) | ≤ 0.030 | Max 0.030 |
| Sulfur (S) | ≤ 0.030 | Max 0.030 |
The addition of Ni and Mo refines the martensitic structure, enhances hardenability, and improves corrosion resistance—especially against pitting in mildly aggressive waters.
Note: F6NM (cast) has identical composition limits per ASTM A743 Grade CA6NM. For plate applications, S41500 is the correct wrought designation.
Mechanical Properties (After Standard Heat Treatment – H1025)
| 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:
- H1025: Aging at 550°C (1025°F) – standard for turbine runners
- H1150D: Dual tempering at 620°C – for maximum toughness in cold climates or seismic zones
All plates are supplied in the solution-annealed + tempered condition unless otherwise specified.
Corrosion & Erosion Resistance in Power Environments
S41500 excels in freshwater, brackish water, and steam service—typical in hydro and thermal power plants:
- ✅ Resists cavitation damage better than carbon steel or 410 stainless
- ✅ Stable passive layer from Cr-Mo synergy reduces general corrosion
- ✅ Low risk of stress corrosion cracking (SCC) in non-chloride environments
- ⚠️ Not recommended for seawater or high-chloride media without coatings
This makes it ideal for runner blades, guide vanes, shafts, and wear rings—components where fatigue life and erosion resistance directly impact plant efficiency and downtime.
Product Specifications & Custom Capabilities
| Parameter | Details |
|---|---|
| Material Designation | UNS S41500 / ASTM A240 Type 415 |
| Cast Equivalent | F6NM / CA6NM (ASTM A743) |
| European Standard | EN 10088-3, 1.4313, X3CrNiMo13-4 |
| Form | Hot-rolled plate, forged plate, precision blanks |
| Thickness Range | 6 mm – 150 mm (standard); up to 500 mm via open-die forging |
| Max Dimensions | 3000 mm (W) × 12,000 mm (L) |
| Surface Finish | As-rolled, pickled, 2B, or machined to Ra ≤ 1.6 µm |
| Testing & Certification | EN 10204 3.1 MTR, PMI, Ultrasonic Testing (ASTM A435), Charpy impact reports |
| Value-Added Services | Waterjet/laser cutting, CNC milling, drilling, beveling, stress relieving, surface grinding |
All plates undergo 100% ultrasonic inspection for internal flaws—mandatory per IEC 60303 and major turbine OEM specifications.
Comparison: S41500 vs. Common Alternatives
| Feature / Grade | S41500 (F6NM) | 316L | 410 Stainless | Duplex 2205 |
|---|---|---|---|---|
| Tensile Strength | 790 MPa | 515 MPa | 520 MPa | 620 MPa |
| Yield Strength | 620 MPa | 205 MPa | 290 MPa | 450 MPa |
| Impact Toughness | Excellent (≥47 J) | Very Good | Poor | Good |
| Weldability | Good (low C) | Excellent | Poor | Moderate |
| Corrosion (Freshwater) | Very Good | Excellent | Fair | Excellent |
| Cost Efficiency | High | Low | Very High | Low |
| Best Use Case | Turbine runners | Chemical tanks | Fasteners | Offshore piping |
S41500 offers the best balance of strength, toughness, and lifecycle cost for hydro components.
Key Applications in Power Generation
- Hydroelectric Turbines: Runner blades, crown rings, band rings, stay vanes
- Pump Components: Impellers, shafts, casings in cooling water systems
- Steam Turbine Parts: Valve stems, control rings (in non-superheated sections)
- Nuclear & Thermal Plants: Wear-resistant structural supports
- Repair & Retrofit: Weld overlay base material for damaged cast F6NM parts
Technical Compliance & Support
Our S41500 plates meet or exceed:
- ASTM A240/A240M (wrought plate)
- ASTM A751 (chemical analysis)
- EN 10088-3 / 1.4313
- IEC 60303 (ultrasonic testing for turbine steel)
- NACE MR0175/ISO 15156 (when supplied in H1150D condition with hardness ≤22 HRC)
We also provide:
- Welding Procedure Specifications (WPS) support
- Heat treatment validation reports
- Material selection consulting for new or legacy designs
Frequently Asked Questions (FAQ)
Q: Is S41500 the same as F6NM?
A: Chemically and mechanically equivalent—but S41500 = wrought plate, F6NM = cast alloy. Use S41500 for rolled/forged plate components.
A: Chemically and mechanically equivalent—but S41500 = wrought plate, F6NM = cast alloy. Use S41500 for rolled/forged plate components.
Q: Can I weld S41500 to cast F6NM parts?
A: Yes—with proper procedure. Use nickel-based filler (e.g., ENiCrFe-3), preheat to 150–200°C, and perform post-weld heat treatment (PWHT) at 590–620°C for critical joints.
A: Yes—with proper procedure. Use nickel-based filler (e.g., ENiCrFe-3), preheat to 150–200°C, and perform post-weld heat treatment (PWHT) at 590–620°C for critical joints.
Q: Do you supply plates certified to turbine OEM standards (e.g., Voith, Andritz, GE)?
A: Yes. We comply with customer-specific specs including additional NDT, macro/micro etching, and hardness mapping.
A: Yes. We comply with customer-specific specs including additional NDT, macro/micro etching, and hardness mapping.
Q: What’s the lead time?
A: 5–10 days for stock sizes; 2–4 weeks for custom forgings with full certification.
A: 5–10 days for stock sizes; 2–4 weeks for custom forgings with full certification.
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