Sae 1112 Baustahl: Der Leitfaden für Eigenschaften, Verwendung & Herstellung

If you’re seeking a steel that balancesFormbarkeit, Stärke, and affordability for projects like automotive parts, small machine components, or light structural frames—Sae 1112 Baustahl is your ideal match. As a low-carbon, free-machining steel (with 0.10–0.15% carbon), it’s easy to shape and weld while offering more strength than lower-carbon grades. Diese Anleitung bricht alles aus, was Sie auswählen müssen, verwenden, and maximize SAE 1112 for your tasks.

1. Material Properties of SAE 1112 Baustahl

SAE 1112’s performance stems from its well-balancedChemische Zusammensetzung—low carbon for workability, plus controlled manganese for added strength. Let’s explore its key traits in detail.

Chemische Zusammensetzung

Sae 1112 is a low-carbon, sulfur-enhanced steel (for free machining) with minimal impurities. Here’s its exact composition (per SAE standards):

Physische Eigenschaften

These traits make SAE 1112 easy to integrate into manufacturing and construction:

• Dichte: 7.85 g/cm³ (same as most structural steels—simplifies weight calculations for parts like shafts or brackets)
• Schmelzpunkt: 1425–1538°C (compatible with standard welding, Schmieden, and rolling processes)
• Wärmeleitfähigkeit: 51.9 W/(m · k) (spreads heat evenly—reduces warping when welding or forming thin sections)
• Wärmeleitkoeffizient: 12.0 µm/(m · k) (low enough to handle seasonal temperature swings in buildings or machinery)
• Elektrischer Widerstand: 1.67 µω · m (not used for electrical components, but useful for safety planning in industrial settings)

Mechanische Eigenschaften

Sae 1112 offers more strength than lower-carbon steels (like SAE 1005) while staying workable. Here are its key performance metrics:

• Zugfestigkeit: 515–655 MPa (handles moderate pulling forces—ideal for automotive axles or machine shafts)
• Ertragsfestigkeit: 310–440 MPA (maintains shape under load—critical for structural components like light beams)
• Härte: 160–210 Hb (resists wear from friction—durable for gears or tractor parts)
• Aufprallzählung: Hoch (absorbs small impacts without breaking—great for agricultural machinery)
• Duktilität: Hoch (kann gebogen werden, gestempelt, or extruded into complex shapes—e.g., Übertragungskomponenten)
• Verlängerung: 15–20% (stretches significantly before breaking—avoids sudden failure in use)
• Ermüdungsbeständigkeit: Mäßig (works for parts with occasional stress, like garage door springs)
• Frakturschärfe: Hoch (prevents catastrophic breaks—safe for everyday use in machinery)

Andere wichtige Eigenschaften

• Gute Schweißbarkeit: Joins easily with MIG, Tig, or stick welding—no preheating needed for sections up to 10 mm dick (saves labor on projects).
• Gute Formbarkeit: Kann heiß verschnauf sein, cold-stamped, or forged into parts of all sizes (from tiny gears to light beams).
• Mäßige Korrosionsbeständigkeit: Resists rust in dry indoor environments—needs coating (galvanizing or paint) for outdoor or wet use.
• Zähigkeit: Performs reliably in temperatures from -10°C to 50°C (suitable for most temperate climates).

2. Applications of SAE 1112 Baustahl

SAE 1112’s blend of strength and workability makes it a top choice across industries—especially where machining and shaping are key. So löst es reale Probleme:

Maschinenbau

Mechanical engineers rely on SAE 1112 for small-to-medium components:

• Getriebe: Small to medium gears for industrial conveyors or household appliances (its free-machining trait lets tools cut teeth smoothly).
• Wellen: Drive shafts for small motors or pumps (handles rotational stress without bending).
• Maschinenteile: Klammern, Gehäuse, und Befestigungselemente (cost-effective for high-volume production).
• Fallstudie: A machinery maker used SAE 1112 for conveyor drive shafts. Die Stahl Zugfestigkeit behandelt 500 RPM operation, und es ist Verarbeitbarkeit cut production time by 25% vs. using SAE 1045. Nach 3 Jahre, the shafts showed no wear.

Automobil

Sae 1112 is a staple in automotive manufacturing for light-to-medium parts:

• Achsen: Small car axles or trailer axles (handles road vibrations and load).
• Antriebswellen: Secondary drive shafts for compact cars (gleicht Stärke und Gewicht aus).
• Übertragungskomponenten: Getriebe, Clips, and synchronizer parts (easy to machine into precise shapes).
• Beispiel: An auto parts supplier used SAE 1112 für Getriebe. Die Stahl Härte resisted wear, und es ist Duktilität allowed for tight tolerances—reducing gear noise by 15%.

Konstruktion

Im Bau, Sae 1112 is used for light structural parts:

• Stahlstahlkomponenten: Non-load-bearing frames for sheds, garages, or small industrial buildings.
• Balken Und Spalten: For lightweight structures like garden pavilions or tool sheds (not heavy high-rises).
• Beispiel: A construction firm used SAE 1112 beams for a 150-square-meter garage. Die Stahl Formbarkeit allowed for custom angles, und es ist Ertragsfestigkeit supported the roof’s weight. With a paint coat, the beams lasted 7 Jahre ohne Rost.

Pipeline -Industrie

Sae 1112 works for low-to-medium pressure, small-diameter pipelines:

• Ideal for residential natural gas lines or irrigation pipes (not high-pressure oil/gas pipelines). Es ist Duktilität lets it be bent around corners, und es ist Stärke prevents leaks under moderate pressure.

Meeresindustrie

For mild marine uses (not open ocean):

• Schiffsstrukturen: Interior parts like storage locker frames or small brackets (not hulls—those need stainless steel).
• Offshore -Plattformen: Temporary handrails or non-critical components (easy to replace if rusted).

Landwirtschaftliche Maschinen

Farmers trust SAE 1112 for durable, Erschwingliche Teile:

• Tractor parts: Getriebe, axle housings, and tool mounts (handles rough terrain and impacts).
• Pflüge Und Egge: Frame components or non-cutting parts (widersteht den Verschleiß aus dem Boden).
• Beispiel: A farm equipment maker used SAE 1112 for plow frames. Die Stahl Aufprallzählung withstood hitting rocks, and it cost 30% less than using HSLA steel.

3. Manufacturing Techniques for SAE 1112 Baustahl

Sae 1112 is easy to manufacture—its chemical composition works with all standard steel processes. Hier ist eine Schritt-für-Schritt-Aufschlüsselung:

Stahlherstellungsprozesse

Two main methods produce SAE 1112, depending on volume:

1. Basis -Sauerstoffofen (Bof): Wird für große Chargen verwendet (Z.B., Blätter, Barren, oder Pfeifen). Molten iron is mixed with manganese and sulfur, then oxygen is blown in to adjust carbon to 0.10–0.15%. Fast and cost-effective for bulk orders.
2. Elektrischer Lichtbogenofen (EAF): Ideal for small batches or custom parts (Z.B., specialized gears). Schrottstahl wird geschmolzen, and elements (Mn, S) are added to meet SAE 1112 Spezifikationen. Flexible for low-volume projects.

Wärmebehandlung

Sae 1112 rarely needs complex heat treatment, but these processes can enhance its properties:

• Normalisierung: Erhitzt sich auf 850–900 ° C., Luft abkühlen. Softens the steel after rolling (makes it easier to stamp or machine).
• Glühen: Erhitzt sich auf 800–850 ° C., Langsam abkühlen. Makes the steel extra ductile for intricate shapes (Z.B., tiny transmission parts).
• Löschen und Temperieren: Rarely used—only for parts needing extra hardness (Z.B., Hochleistungsgeschäfte).

Bildungsprozesse

Sae 1112 excels in forming—its workability lets it be shaped into almost anything:

• Heißes Rollen: Heats to 1100–1200°C, rolls into bars, Blätter, oder Pfeifen (main method for basic SAE 1112 Produkte).
• Kaltes Rollen: Rolls at room temperature. Creates smooth, präzise Blätter (used for stamping small parts like clips).
• Schmieden: Heats steel and hammers it into thick parts (Z.B., tractor axles—enhances strength by aligning grain structure).
• Extrusion: Pushes heated steel through a die to make hollow parts (Z.B., small pipeline sections or gear housings).
• Stempeln: Uses high-pressure presses to cut or bend steel into shapes (Z.B., automotive brackets or washer blanks—fast for high-volume production).

Oberflächenbehandlung

Förderung der Haltbarkeit und Korrosionsbeständigkeit:

• Galvanisieren: Dips in geschmolzener Zink. Ideal for outdoor parts (Z.B., garage beams or agricultural machinery)—lasts 15+ Jahre ohne Rost.
• Malerei: Applies epoxy or enamel paint. Wird für Innenteile verwendet (Z.B., machine housings) to prevent minor rust.
• Schussstrahlung: Blasts with tiny metal balls to remove dirt, Skala, or rust. Prepares surfaces for welding or coating.
• Beschichtung: Uses fusion-bonded epoxy for pipelines (prevents corrosion in water or gas lines).

4. Sae 1112 Baustahl vs. Andere Materialien

How does SAE 1112 compare to other common steels and alloys? Lassen Sie es uns aufschlüsseln, um Ihnen bei der Auswahl zu helfen:

Sae 1112 vs. Kohlenstoffstähle (Z.B., Sae 1005)

Sae 1112 vs. Hochfest niedrige Alloy (Hsla) Stähle (Z.B., X60)

• Chemische Zusammensetzung: HSLA has alloys (Mn, In) for high strength; Sae 1112 has no extra alloys (keeps cost low).
• Eigenschaften: HSLA is 2x stronger but hard to machine; Sae 1112 is weaker but easier to shape.
• Anwendungen: HSLA = high-pressure pipelines, Brücken; Sae 1112 = automotive parts, Kleine Wellen.

Sae 1112 vs. Edelstähle (Z.B., 304)

Sae 1112 vs. Aluminiumlegierungen (Z.B., 6061)

• Gewicht: Aluminium ist 1/3 leichter, but SAE 1112 Ist 30% billiger.
• Stärke: Sae 1112 hat eine höhere Zugfestigkeit (515–655 MPa vs. aluminum’s 310 MPA).
• Anwendungen: Aluminum = lightweight parts (Fahrradrahmen); Sae 1112 = strength-focused parts (Achsen, Getriebe).

5. Yigu Technology’s Perspective on SAE 1112 Baustahl

Bei Yigu Technology, we see SAE 1112 as a “versatile mid-range solution” for clients balancing strength and workability. Es istfree-machining trait cuts production time for mechanical parts, während es istMäßige Stärke works for automotive and light construction needs. We often recommend it to small manufacturers—its low cost and easy forming reduce project risks. Für den Außengebrauch, we pair it with galvanizing to boost corrosion resistance. Sae 1112 isn’t for heavy loads, but for most mid-scale projects, it’s the most cost-effective choice.

FAQ About SAE 1112 Baustahl

1. Can SAE 1112 be used for high-pressure oil pipelines?

No—SAE 1112’s yield strength (310–440 MPA) is too low for high-pressure oil/gas (was braucht 480+ MPA). Use HSLA steels like X60 or X70 for pipelines. Sae 1112 works only for low-pressure lines (Z.B., residential gas).

2. Is SAE 1112 suitable for outdoor construction in rainy climates?

Yes—if you add a coating. Without protection, it will rust in 1–2 years. We recommend hot-dip galvanizing for outdoor parts like garage beams—it extends lifespan to 15+ Jahre, even in rainy areas.

3. Can SAE 1112 an andere Stähle verschweißt werden (like SAE 1045)?

Yes—use low-hydrogen welding consumables (Z.B., E7018 electrodes) Um das Knacken zu vermeiden. Preheat SAE 1045 (the higher-carbon steel) to 150–200°C before welding, and let the joint cool slowly. This ensures a strong, durable bond.