High Performance DIN 1.2312 Annealed Carbon Steel Round bar
1: DIN 1.2312 steel introduction
NAK80 steel is a precipitation or age-hardened mold steel with a uniform through hardness of approximately 40 HRC. It is super clean, Vacuum-Arc Remelted steel with uniform grain structure, uniform hardness, and excellent dimensional stability. NAK80 tool steel is the improved steel grade of NAK55, on mirror surface, EDM surface and toughness.
2: DIN 1.2312 Steel equivalent
| Country | USA | German | Japan |
| Standard | ASTM A681 | DIN EN ISO 4957 | JIS G4404 |
| Grade | P21/P20+S | 1.2312 | NAK80 |
3: DIN 1.2312 steel chemical composition
| Grade | C | Si | Mn | P | S | Cr | Mo |
| NAK80 | 0.15 | 0.3 | 1.5 | 0.03 | 0.03 | 1.4-2 | 0.3-0.55 |
| 1.2312 | 0.06-0.16 | 0.4 | 1.4-1.7 | 0.03 | 0.03 | 1.8-2.1 | 0.15-0.25 |
| P21 | 0.18-0.22 | 0.2-0.4 | 0.2-0.4 | 0.03 | 0.03 | 1.4-2 | 0.3-0.55 |
4: DIN 1.2312 steel mechanical properties
The mechanical properties mainly include tensile strength, yield strength, elongation, area or reduction, hardness, impact value, non-metalic inclusion etc. Different heat treatment, the mechanical properties will be different, such as normalized, tempered, QT. If you want to know the properties, kindly contact the salesman.
5:DIN 1.2312 steel overviews
| Size | Round | Dia 200-1000mm |
| Plate/Flat/Block | Thickness
16mm-100mm |
Width
200mm-2000mm |
| Heat treatment | Normalized ; Annealed ; Quenched ; Tempered |
| Surface condition | Black; Peeled; Polished; Machined; Grinded; Turned; Milled |
| Delivery condition | Forged; Hot rolled; Cold drawn |
| Test | Tensile strength, Yield strength, elongation, area of reduction, impact value, hardness, grain size, ultrasonic test, US inspection, magnetic particle testing, etc. |
| Payment terms | T/T;L/C;/Money gram/ Paypal |
| Trade terms | FOB; CIF; C&F; etc.. |
| Delivery time | 30-45 days |
| Application | NAK80 tool steels are used for transparent products and others for which mirror finished surface are particularly important; Products for which electrical discharge machined surfaces are very important; Typical for clear lens molds, extremely critical diamond finish applications, and molds requiring special EDM finish. |
5. Heat Treatment of DIN 1.2312
Soft Annealing
Heat NAK80 steel to 640-660oC, cool slowly. This will produce a maximum Brinell hardness of 330.
Hardening
Harden steel NAK80 from a temperature of 880-900oC followed by oil quenching. Hardness after quenching is 41 HRC.
Age-Hardening
Heat up to 550oC with heating speed 60oC/h, then hold 5 hours at temperature and then cool slowly in the air.7. Stability
6: Delivery condition
For hot forged bar, usually the delivery condition is hot forged, annealed/QT rough turned/Black surface.
For hot rolled bar, usually the delivery condition is hot rolled, annealed/QT, Black surface.
For hot forged plate, usually the delivery condition is hot forged, annealed/QT, milled surface
For hot rolled plate, usually the delivery condition is hot rolled, annealed/QT, black surface.
