Description
SM45 steel is a high-quality carbon plastic mold steel, compared with the quality of 45 carbon steel structure, the steel in the sulfur, phosphorus content is low, steel purity is good.
When producing small plastic mold, quenching and tempering can be higher hardness and better toughness. The advantages of the steel is cheap, good machinability, high hardness after quenching, quenching and tempering has good toughness and a certain degree of wear resistance.
Chemical Composition of SM45 Steel Material
| C(％) | Si(％) | Mn(％) | P(％) | S(％) |
| 0.42～0.48 | 0.17～0.37 | 0.50～0.80 | 0.03 | 0.03 |
SM45 steel Mechanical Properties
| Rp0.2 (MPa) | Rm (MPa) | Impact KV (J) | Elongation A (%) | A Z /(%) | Delivery | Hardness HB |
| 163 (≥) | 286 (≥) | 32 | 13 | 14 | Solution & Aging, Ann, Ausaging, Q+T | 422 |
SM45 steel Physical Properties
| Property | Density kg/dm3 | Temperature T °C/F | Specific heat J/kgK | Thermal conductivity W/mK |
| 343(≥) | 964(≥) | 31 | 24 | 41 |
| Temp. °C/°F | Creep strain limit (10000h) (Rp1,0)N/mm2 | Creep rupture strength (10000h) (Rp1,0)N/mm2 | Electric resistance µΩ·cm | Modulus of elasticity kN/mm2 |
| 394 | 772 | 821 | Solution and Aging,Annealing,Ausaging,Q+T,etc | 243 |
Application
SM45 steel flat bar is widely used for all industrial applications requiring more wear resistance and strength. Typical applications as Gears, Pins, Rams, Shafts, Rolls, Sockets Axles, Spindles, Worms Bolts, Ratchets, Light gears, Studs, Crankshafts, Guide rods, Connecting rods, Torsion bars, Hydraulic clamps.
SM45 Range of products:
| Product type | Products | Dimension | Processes | Deliver Status |
| Plates/Sheets | Plates/Sheets | 0.08-200mm(T)*W*L | Forging,hot rolling and cold rolling | Annealed,Solution and Aging,Q+T,ACID-WASHED,Shot Blasting |
| Steel Bar | Round Bar,Flat Bar,Square Bar | Φ8-1200mm*L | Forging,hot rolling and cold rolling,Cast | Black,Rough Turning,Shot Blasting, |
| Coil/Strip | Steel Coil/Steel Strip | 0.03-16.0x1200mm | Cold-Rolled&Hot-Rolled | Annealed,Solution and Aging,Q+T,ACID-WASHED,Shot Blasting |
| Pipes/Tubes | Seamless Pipes/Tubes,Welded Pipes/Tubes | OD:6-219mm x WT:0.5-20.0mm | Hot extrusion,Cold Drawn,Welded | Annealed,Solution and Aging,Q+T,ACID-WASHED |
