Common size on stock, Special sizes needs new production.Can cut to Size, Cut to Shape.
EMERSONMETAL
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| Parameter | Details |
| Steel Grades | 20MnCr5, 42CrMo4 |
| Standards | EN 10084, EN 10083-3, DIN 17210, DIN 17200 |
| Diameter Range | 10mm – 300mm (hot rolled); up to 600mm forged upon request |
| Length | 4m – 12m (random or fixed length) |
| Delivery Condition | Hot Rolled, Annealed, Normalized, Quenched & Tempered (Q+T) |
| Surface Finish | Black / Peeled / Rough Turned / Bright Drawn / Centerless Ground |
| Grade | Condition | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) |
| 20MnCr5 | Annealed | ≤650 | - | ≥20 |
| 20MnCr5 | Carburized & Hardened | ≥1,000 | ≥635 | ≥9 |
| 42CrMo4 | Quenched & Tempered | 900–1,100 | ≥650 | ≥12 |
Mechanical property enhancement: The hot rolling process improves the toughness, impact resistance, ductility and tensile strength of the steel.
Grain refinement: Coarse grains are refined during the hot rolling process, thus improving the overall properties of the steel.
Cost-effectiveness: Hot rolled steel bars are relatively simple to process and consume less energy, making them more economically priced.
Surface Characteristics: Hot rolled steel bars usually have a blue-grey rough surface with slightly rounded edges and corners.
Application:
Construction industry: used in building structures such as beams, columns, frames, etc. to provide support and stability.
Machinery Manufacturing: Used in the manufacture of mechanical parts such as shafts, connecting rods, gears, etc.
Automobile manufacturing: used for automobile chassis, body frames and other components.
Bridge engineering: used for support structures and connecting parts of bridges.
Other fields: such as industrial equipment, transport tools, agricultural machinery, etc.
Q: What is the main difference between 20MnCr5 and 42CrMo4?
A: 20MnCr5 is a case-hardening steel designed for components requiring a hard, wear-resistant surface with a tough core (e.g., gears and camshafts). 42CrMo4 is a through-hardening quenched-and-tempered steel used for heavy-duty parts subjected to high static and dynamic loads (e.g., crankshafts and high-strength bolts).
Q: In what delivery condition are these bars usually supplied?
A: 20MnCr5 is commonly supplied annealed for ease of machining before customer carburizing. 42CrMo4 is typically supplied quenched and tempered (Q+T) to meet specified mechanical properties, though hot rolled or annealed delivery is also available upon request.
Q: Do you offer cutting to fixed length?
A: Yes. We can saw-cut or shear bars to your specified length with end-squareness control. Maximum and minimum cut lengths depend on diameter and grade.
Q: What is your minimum order quantity (MOQ)?
A: Our standard MOQ is one metric ton per size and grade. For trial orders or mixed-grade containers, please contact us to discuss flexible arrangements.
