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P235GH EN 10028-2 1.0345 GP240GH EN 10213-2 1.0619 EN1092 Flange Supplier
1.0345 Steel (S355J2) - EN 10025 Standard
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.
Chemical Composition (Weight Percent)
Element
Content Range
Carbon (C)
max. ~0.20%
Silicon (Si)
max. ~0.55%
Manganese (Mn)
up to ~1.60% (often 1.0-1.6%)
Phosphorus (P)
max. 0.025%
Sulfur (S)
max. 0.025%
Nitrogen (N)
max. ~0.020%
Copper (Cu)
max. ~0.55% (if present)
Chromium (Cr)
usually ≤0.30-0.40% (residual)
Nickel (Ni)
usually ≤0.50% (residual)
Molybdenum (Mo)
usually ≤0.10% (residual)
Key Composition Characteristics
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.
Practical Applications
Due to its specific balance of carbon and manganese with controlled impurities, 1.0345 (S355J2) is readily weldable with conventional processes, strong enough for structural applications (minimum yield strength around 355 MPa in thinner sections), and tough at low temperatures. This makes it suitable for construction, machinery parts, bridges, and general structural steelwork.
0619 Steel - Carburizing Grade
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.
Chemical Composition (Weight Percent)
Element
Content Range
Carbon (C)
0.15 - 0.21
Manganese (Mn)
0.70 - 1.00
Silicon (Si)
up to about 0.15-0.35
Phosphorus (P)
max 0.040
Sulfur (S)
max 0.050
Why This Composition Matters
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 Steel - Cast Steel Grade (DIN EN 10293 / EN 10213)
1.0619 is a non-alloy cast steel grade commonly used for general engineering and structural castings.
Chemical Composition (Weight Percent)
Element
Content Range
Carbon (C)
0.17-0.23%
Silicon (Si)
0.40-0.80%
Manganese (Mn)
0.50-0.90%
Phosphorus (P)
≤ 0.035%
Sulfur (S)
≤ 0.035%
Key Characteristics
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.
Important: For exact composition limits for design, certification, or compliance, always refer to the specific material certificate (mill test certificate) or the relevant EN standards. Individual producers may work near the edges of the specification ranges, and small variations in composition may exist depending on the specific standard edition or foundry practice.
