1.6511 (36CrNiMo4) is a high-strength alloy steel from German standards (DIN/EN). This low-alloy nickel-chromium-molybdenum steel excels in toughness and hardenability. It supports stainless steel pipes and fittings under heavy loads. Industries like automotive and aerospace rely on it for durability.
What Makes 1.6511 Special?
This steel blends strength, toughness, and wear resistance. Manufacturers choose 1.6511 for stainless steel pipe fittings needing reliability. Its unique composition ensures performance in demanding conditions. Let’s explore why it’s a top choice.
Chemical Composition of 1.6511
| Élément | C | Si | Mn | P | S | Cr | Ni | Mo |
|---|---|---|---|---|---|---|---|---|
| Contenu (%) | 0.32-0.40 | 0.17-0.37 | 0.50-0.80 | ≤0.025 | ≤0.025 | 0.90-1.20 | 0.90-1.20 | 0.15-0.30 |
Ce que nous faisons
KAYSUNS fournit des solutions globales pour les matériaux de tuyauterie tels que les TUBES, les RACCORDS, les FLANGES, les VANNES en acier inoxydable, en acier duplex et en acier allié, etc. Nous personnaliserons les produits les plus appropriés pour vous. Si vous avez des questions sur notre société et nos produits, n'hésitez pas à nous contacter.
Mechanical Properties of 1.6511
| Biens | Résistance à la traction | Limite d'élasticité | Élongation | Impact Toughness |
|---|---|---|---|---|
| Valeur | 1000-1200 MPa | ≥900 MPa | ≥12% | ≥35 J |
Core Advantages of 1.6511
Reaches 1200 MPa, perfect for heavy-duty stainless steel pipes.
It handles extreme stress without breaking.
Absorbs shocks, ideal for fittings under impact.
This reduces cracking risks in tough jobs.
Ensures uniform hardness in large stainless steel fittings.
Big parts stay strong throughout.
High carbon and carbides protect pipe surfaces.
It extends the life of fittings.
Withstands repeated loads in stainless steel pipes.
This cuts down on failures over time.
Heat Treatment Process
- recuit: Heat to 850-880°C, then cool slowly. It improves machinability.
- Trempe: Heat to 850°C, cool in oil or water. This boosts hardness.
- Trempe: Heat to 500-650°C (600°C works best). It balances strength and toughness.
Applications en acier inoxydable
- Tubes en acier inoxydable: Powers gears and shafts in heavy machinery.
- Raccords de tuyauterie en acier inoxydable: Builds strong bolts and connectors.
International Equivalents
| Country/Region | Standard | Grade |
|---|---|---|
| Allemagne | DIN/EN | 36CrNiMo4 |
| Etats-Unis | ASTM | 4340 |
| Japon | JIS | SNCM439 |
| Chine | FR | 40CrNiMoA |
Ce que nous faisons
Limitations to Know
- Poor Weldability: Preheat to 250-350°C before welding. Post-weld tempering helps too.
- Limited Corrosion Resistance: Needs coatings like chrome for wet environments.
Processing Tips
- Machining: Use carbide tools at low speeds in tempered state. Annealed, it cuts easily.
- Soudage: Opt for TIG or laser welding. Preheat and use low-hydrogen rods.
- Traitement de surface: Add nitride or PVD coatings for extra wear resistance.
Why 1.6511 Matters for Your Project
Choosing 1.6511 ensures strength and longevity. It supports stainless steel pipe fittings in tough conditions. Plus, its global standards guarantee quality. For high-load needs, it’s a smart pick.
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