S600MC Hot Rolled Steel Coil
S600MC Hot Rolled Steel Coil | High Yield Cold Forming Steel EN 10149-2
S600MC is a hot-rolled high yield strength steel for cold forming, compliant with BS EN 10149-2. It offers minimum yield strength of 600 MPa with excellent formability, weldability, and impact properties. Ideal for weight-reduced automotive structural components.
Cold forming, bending, stamping, deep drawing, welding, cutting, punching
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S600MC Hot Rolled Steel Coil Introduction
S600MC is a thermomechanically rolled, high yield strength steel designed for cold forming, specified in BS EN 10149-2. It belongs to the family of low-alloy, microalloyed steels, characterized by a fine grain structure achieved through controlled rolling. The steel provides a minimum yield strength of 600 MPa while retaining excellent formability, weldability, and toughness. Its balanced chemical composition, with controlled additions of vanadium, niobium, and titanium, ensures consistent mechanical properties across varying thicknesses.
- High strength-to-weight ratio
- Excellent cold formability for stamping and bending
- Good impact resistance at low temperatures
- Uniform properties across the strip width and length
S600MC Hot Rolled Steel Coil Chemical Composition
The ladle analysis conforming to BS EN 10149-2:2013 for grade S600MC. Microalloying elements Nb, V, and Ti are used individually or in combination to achieve fine-grain strengthening. The sum of these elements is strictly controlled to preserve weldability and toughness.
- Phosphorus and sulfur are kept low for improved formability
- Total aluminum ensures full deoxidation and grain size control
- Boron is not intentionally added
| Element | Standard Value (wt.%) | Remarks |
|---|---|---|
| C | ≤0.12 | Maximum |
| Si | ≤0.50 | Maximum |
| Mn | ≤2.10 | Maximum |
| P | ≤0.025 | Maximum |
| S | ≤0.015 | Maximum |
| Altot | ≥0.015 | Minimum |
| Nb | ≤0.09 | Maximum |
| V | ≤0.20 | Maximum |
| Ti | ≤0.22 | Maximum |
| Nb+V+Ti | ≤0.22 | Maximum sum of microalloying elements |
| Mo | ≤0.50 | Maximum (for information only, not mandatory for all casts) |
| B | Not intentionally added | Permitted only with agreement |
S600MC Hot Rolled Steel Coil Physical Properties
Physical data represent average values for thermomechanically rolled microalloyed steels. They are provided for design calculations and are not part of the delivery specification.
- Density is used for weight estimation
- Thermal expansion and conductivity are essential for welding and thermal processing
- Electrical resistivity is important for applications involving induction heating or electromagnetic compatibility
| Property | Standard Requirement (typical) | Unit | Test condition / Remarks |
|---|---|---|---|
| Density (ρ) | 7.85 | g/cm³ | Ambient temperature |
| Modulus of elasticity (E) | 210 | GPa | Tension, longitudinal |
| Shear modulus (G) | ≈81 | GPa | Calculated from E and ν |
| Poisson's ratio (ν) | 0.3 | – | Elastic range |
| Thermal expansion coefficient (α) | 11.7 × 10⁻⁶ | K⁻¹ | Between 20 °C and 100 °C |
| Thermal conductivity (λ) | ≈50 | W/(m·K) | At 20 °C |
| Specific heat capacity (cp) | ≈460 | J/(kg·K) | At 20 °C to 100 °C |
| Electrical resistivity (ρe) | ≈0.25 | μΩ·m | At 20 °C, typical for low-carbon steels |
S600MC Hot Rolled Steel Coil Mechanical Properties
Mechanical properties are determined on transverse test pieces according to EN 10149-2. The yield strength range and tensile strength ensure a combination of high strength and ductility. Bendability is verified through a 180° bend test without cracking.
- Values apply to skin-passed or as-rolled condition
- For thicknesses above 6 mm, elongation on a proportional gauge length A5 may be agreed
- Impact toughness (KV) is not mandatory in the base standard but can be ordered by reference to EN 10149-1, Option 5
| Property | Standard Requirement | Unit | Test condition / Remarks |
|---|---|---|---|
| Yield strength (ReH) | 600 – 760 | MPa | Transverse, nominal thickness ≤12 mm |
| Tensile strength (Rm) | 650 – 820 | MPa | Transverse |
| Elongation after fracture (A80) | ≥ 13 | % | Thickness ≤ 3.0 mm |
| Elongation after fracture (A80) | ≥ 15 | % | Thickness > 3.0 mm and ≤ 6.0 mm |
| Elongation after fracture (A5) | To be agreed | % | Thickness > 6.0 mm |
| Bend test (180°) | No cracks | – | Mandrel diameter = 2t (twice the specimen thickness), t = strip thickness |
S600MC Hot Rolled Steel Coil Exact Equivalent Material Standards and Substitutable Grades
| Country/Region | Standard | Grade | Remarks |
|---|---|---|---|
| Europe | EN 10149-2 | S600MC | Identical specification |
| Germany | DIN EN 10149-2 | S600MC | Identical; also known under former designation QStE600TM |
| United Kingdom | BS EN 10149-2 | S600MC | Identical; supersedes former BS 1449 |
| France | NF EN 10149-2 | S600MC | Identical |
| International | ISO 6930-1 | S600MC | Technically equivalent |
S600MC Hot Rolled Steel Coil Application Introduction
S600MC is designed for weight-critical components requiring high static and dynamic strength. It can be formed by cold bending, stamping, roll forming, and deep drawing. The fine grain structure guarantees excellent resistance to fatigue and impact, while low carbon equivalent (CEV) permits trouble-free arc and resistance welding. The steel is typically used in the as-rolled or pickled condition and can be coated by electrogalvanizing or hot-dip galvanizing after forming.
Product Applications: Automotive chassis frames and subframes, Suspension arms, control arms, torsion beams, Wheel rims, disc wheels, Longitudinal and cross members for trucks, Material handling forks and lifting equipment, Structural hollow sections and cold-formed profiles
Processed into products: Lower control arms, upper control arms, axle beams, Engine cradles, cradle cross members, Bumper reinforcement beams, crash boxes, Side impact beams, door intrusion bars, Trailer frame rails, chassis cross members, Stamped brackets, mounting plates, flanges
Application industries: Automotive manufacturing (cars, trucks, trailers), Transportation and material handling, Construction machinery and agricultural equipment, General engineering and welded structures
S600MC Hot Rolled Steel Coil Similar / Alternative Material Recommendations
| Country/Region | Standard | Grade | Remarks |
|---|---|---|---|
| Europe | EN 10149-2 | S550MC | Slightly lower yield strength (550–760 MPa). Suitable when 600 MPa minimum is not required and slightly better formability is desired. |
| Europe | EN 10149-2 | S650MC | Higher yield strength (650–830 MPa). Can be used when increased load-bearing capacity is needed, with some reduction in elongation. |
| USA | ASTM A1011/A1011M | Grade 80 [550] | Comparable 550 MPa minimum yield steel; not a full match in composition and production route. |
| Japan | JIS G 3113 | SAPH 440 / SAPH 540 | Contains lower yield strengths (440–540 MPa). Not directly equivalent but used for similar automotive applications. |
Notes:
- Optional supplementary requirements: Charpy V-notch impact test (KV) at specified temperatures in accordance with EN 10149-1, Option 5.
- Surface finish: As-rolled, pickled and oiled, or skin-passed and oiled. The producer should be informed of intended surface coatings.
- Edge condition: Mill edge or trimmed edge as agreed. Slitting burr height should be considered for forming operations.
- Welding: Suitable for all common welding processes (MAG, laser, resistance spot). Low heat input and appropriate filler materials are recommended to maintain HAZ toughness.
- Forming simulation: Material data cards for finite element simulation (e.g., Barlat, Hill models) are available from some mills.
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