P235GH 1.0345 1.0619 EN1092 Steel Flange and Forged Flange Supplier

1.0345 steel is a common low-alloy structural steel grade according to the European EN 10025 standard, better known by its steel name: S355J2.

• Low Carbon (C ≤ ~0.20%): Keeps the steel weldable and relatively easy to form, helping avoid excessive hardness in the heat-affected zone during welding.
• Higher Manganese (up to ~1.6%): Increases strength and toughness, improving hardenability slightly while maintaining structural steel properties.
• Tight Limits on P and S (≤0.025%): These impurity elements can cause brittleness and reduce toughness, with low values being crucial for good toughness at low temperatures.
• Silicon and Residual Alloying Elements: Silicon acts mainly as a deoxidizer and slightly increases strength, while small amounts of Cr, Ni, Mo, and Cu can improve corrosion resistance or toughness.

0619 steel is a low-carbon, manganese steel used mainly for carburized parts such as gears, shafts, and fasteners where good toughness and machinability are needed.

• Low Carbon (around 0.19%): Core stays relatively soft and tough after carburizing and quenching, reducing risk of cracking and distortion during heat treatment.
• Medium Manganese (around 0.8-0.9%): Improves hardenability enough for a strong case after carburizing, helping strength and wear resistance without making the steel too brittle.
• Very Low P and S: Better toughness and fatigue resistance, making it more reliable for dynamically loaded parts like gears and shafts.

1.0619 is a non-alloy cast steel grade commonly used for general engineering and structural castings.

• Low to Medium Carbon Cast Steel: Carbon level around 0.2% provides good balance of strength and toughness with reasonable weldability.
• Non-alloy Structural Steel: No significant alloying elements like Cr, Ni, or Mo; properties are mainly controlled by carbon, manganese, and heat treatment.
• Typical Uses: General machine parts, housings, frames, and various structural castings where moderate strength and good toughness are required.