| Category | Sehgal Grade | AISI / SAE (USA) | DIN / W.Nr. (Germany) | JIS (Japan) | BS (UK) |
|---|
| Grade | C (Carbon) | Cr (Chrome) | Mn (Mang.) | Mo (Moly) | Ni (Nickel) | V (Vanadium) |
|---|
| Grade | Forging Temp (°C) | Hardening Temp (°C) | Quenching | Tempering (°C) | Final Hardness |
|---|
Convert values between Rockwell C (HRC), Brinell (HB), and Vickers (HV) instantly.
The Hardener. Dictates maximum hardness. High carbon (D3) means extreme wear resistance but brittleness. Low carbon (H13) allows toughness.
The Shield. Adds deep hardenability and corrosion resistance. Forms carbides that act like microscopic diamonds to resist wear.
The Refiner. Keeps grain structure fine, preventing cracking. Essential in D2 and HSS for edge retention.
The Toughener. Allows the core to absorb shock without snapping. Crucial for heavy gears (En353) and shafts (En24).
The Heat Fighter. Gives "Red Hardness"—the ability to stay hard when hot. The key ingredient in H13 for die casting.
The Cutter. Allows tools to cut at high speeds without losing their edge from friction heat. Found in M2 HSS.
