| Quantity: | |
|---|---|
| Category | Parameter | Benchmark / Typical Value |
| Chemical Composition | Carbon (C) | 0.38% – 0.43% (SAE 4340 typical range) |
| Manganese (Mn) | 0.65% – 0.90% (SAE 4340) | |
| Silicon (Si) | ~0.15% – 0.35% (medium‑carbon alloy typical) | |
| Phosphorus & Sulfur (P, S) | ≤0.01% each (internal control for 4340 grade) | |
| Nitrogen (N) | May be microalloyed or nitrided in advanced AFS steels for surface hardness and wear resistance | |
| Mechanical Properties | Tensile Strength (σb) | 860 – 1,980 MPa (SAE 4340 range depending on heat treatment) |
| Yield Strength (σs) | 740 – 1,860 MPa (SAE 4340, depending on temper) | |
| Elongation (δ%) | ~11% – 23% (4340 achieves both toughness and ductility) | |
| Hardness | 24 – 53 HRC depending on quenching and tempering level | |
| Impact Energy (KV₂ J) | Typically ≥25 J in quenched/tempered and peel‑treated high‑toughness steels (similar spec) | |
| Heat Treatment | Forge-normalizing | Typical full-austenitizing (≈840‑900 °C), followed by air cooling to refine structure |
| Quenching & Tempering | Oil/water quenching then tempering (e.g. 400‑600 °C) to target specific toughness-hardness balance | |
| Stress Relief / Tempering | Intermediate temper 500‑650 °C post-forging to reduce residual stress and prevent cracking | |
| Forging | Forging Temperature Range | ~1,100 °C – 1,200 °C (above recrystallization for medium‑carbon steels) |
| Minimum Forging Temperature | Avoid forging below ~850 °C to prevent incomplete recrystallization | |
| Cooling Method | Controlled cooling (air / sand) to prevent distortion and maintain microstructural refinement |
Superior Surface Hardness and Abrasion Resistance
Nitriding forms a hardened layer (~1000 HV), enhancing wear life under high-friction conditions.
High Tensile and Yield Strength
Forged steel achieves up to 1980 MPa tensile strength, ideal for load-bearing automotive parts.
Outstanding Impact and Fatigue Resistance
Tempered microstructure maintains ≥25 J impact toughness, with excellent fatigue durability.
Dimensional Accuracy from Closed-Die Forging
Controlled forging (1100–1200 °C) ensures low-porosity, fine-grain plates with tight tolerances.
Customizable Heat Treatment Profile
Tailored quench-temper or induction hardening balances hardness, toughness, and ductility.
Heavy‑Duty Brake Assemblies
Provides structural support and heat shielding in disc and drum brake systems under high pressure and temperature
Automotive Friction Pad Mounting
Acts as a robust substrate for friction linings or brake pads, ensuring secure mechanical engagement in braking assemblies
High‑Load Support Components
Ideal for load-bearing auto parts such as shafts, hubs, and spindles thanks to its high wear and fatigue resistance
Thermally Demanding Environments
Excels in applications requiring thermal stability and dimensional accuracy during high‑temperature braking cycles
A: It provides structural support in brake systems, helping to secure pads and manage heat during braking.
A: Medium-carbon alloy steels like SAE 4340 are commonly used for their strength, wear resistance, and toughness.
A: Yes, they are forged and heat-treated to perform reliably under extreme thermal and mechanical conditions.
A: Yes, forging and machining can be customized to meet various OEM specifications and dimensional requirements.
| Category | Parameter | Benchmark / Typical Value |
| Chemical Composition | Carbon (C) | 0.38% – 0.43% (SAE 4340 typical range) |
| Manganese (Mn) | 0.65% – 0.90% (SAE 4340) | |
| Silicon (Si) | ~0.15% – 0.35% (medium‑carbon alloy typical) | |
| Phosphorus & Sulfur (P, S) | ≤0.01% each (internal control for 4340 grade) | |
| Nitrogen (N) | May be microalloyed or nitrided in advanced AFS steels for surface hardness and wear resistance | |
| Mechanical Properties | Tensile Strength (σb) | 860 – 1,980 MPa (SAE 4340 range depending on heat treatment) |
| Yield Strength (σs) | 740 – 1,860 MPa (SAE 4340, depending on temper) | |
| Elongation (δ%) | ~11% – 23% (4340 achieves both toughness and ductility) | |
| Hardness | 24 – 53 HRC depending on quenching and tempering level | |
| Impact Energy (KV₂ J) | Typically ≥25 J in quenched/tempered and peel‑treated high‑toughness steels (similar spec) | |
| Heat Treatment | Forge-normalizing | Typical full-austenitizing (≈840‑900 °C), followed by air cooling to refine structure |
| Quenching & Tempering | Oil/water quenching then tempering (e.g. 400‑600 °C) to target specific toughness-hardness balance | |
| Stress Relief / Tempering | Intermediate temper 500‑650 °C post-forging to reduce residual stress and prevent cracking | |
| Forging | Forging Temperature Range | ~1,100 °C – 1,200 °C (above recrystallization for medium‑carbon steels) |
| Minimum Forging Temperature | Avoid forging below ~850 °C to prevent incomplete recrystallization | |
| Cooling Method | Controlled cooling (air / sand) to prevent distortion and maintain microstructural refinement |
Superior Surface Hardness and Abrasion Resistance
Nitriding forms a hardened layer (~1000 HV), enhancing wear life under high-friction conditions.
High Tensile and Yield Strength
Forged steel achieves up to 1980 MPa tensile strength, ideal for load-bearing automotive parts.
Outstanding Impact and Fatigue Resistance
Tempered microstructure maintains ≥25 J impact toughness, with excellent fatigue durability.
Dimensional Accuracy from Closed-Die Forging
Controlled forging (1100–1200 °C) ensures low-porosity, fine-grain plates with tight tolerances.
Customizable Heat Treatment Profile
Tailored quench-temper or induction hardening balances hardness, toughness, and ductility.
Heavy‑Duty Brake Assemblies
Provides structural support and heat shielding in disc and drum brake systems under high pressure and temperature
Automotive Friction Pad Mounting
Acts as a robust substrate for friction linings or brake pads, ensuring secure mechanical engagement in braking assemblies
High‑Load Support Components
Ideal for load-bearing auto parts such as shafts, hubs, and spindles thanks to its high wear and fatigue resistance
Thermally Demanding Environments
Excels in applications requiring thermal stability and dimensional accuracy during high‑temperature braking cycles
A: It provides structural support in brake systems, helping to secure pads and manage heat during braking.
A: Medium-carbon alloy steels like SAE 4340 are commonly used for their strength, wear resistance, and toughness.
A: Yes, they are forged and heat-treated to perform reliably under extreme thermal and mechanical conditions.
A: Yes, forging and machining can be customized to meet various OEM specifications and dimensional requirements.
