JIS SNCM 21 Chemical composition and Mechanical properties
| Element | Weight % |
| C | 0.15-0.20 |
| Mn | 0.70-0.90 |
| P | 0.035 (max) |
| S | 0.04 (max) |
| Si | 0.15-0.30 |
| Cr | 0.40-0.60 |
| Ni | 0.40-0.70 |
| Mo | 0.15-0.25 |
JIS SNCM 21
Data Table for:Alloy steel:JIS SNCM 21
| Steel grade type | Alloy steel: |
|---|---|
| Standard | JIS |
| Production specifications | Steel plate,Sheet, Coil,Flat bar,Round bar, Strip steel,wire,All kinds of forgings. |
| Mchining | Turning Milling Grinding Deep hole drilling: length max 9.8 meters. |
Range of work |
Round bar steel: 1mm to 2000mm Square-shape steel: 10mm to 1000mm steel Plate/sheet:0.08mm to 800mm Width: 10mm to 1500mm Lenth: We can supply any lenth based on the customer's requirement. Forging: Shafts with flanks/pipes/tubes/slugs/donuts/cubes/other shapes Tubings: OD: φ4-410 mm, with wall thickness ranging from 1-35 mm. |
| Heat treatment | Normalizing,Annealing,Tempering,Quenching,Hardening and tempering,Seasoning,Surface hardening,Carburizing |
Mechanical Properties
| Properties | Conditions | ||
|---|---|---|---|
| T (°C) | Treatment | ||
| Density (×1000 kg/m3) | 7.7-8.03 | 25 | |
| Poisson's Ratio | 0.27-0.30 | 25 | |
| Elastic Modulus (GPa) | 190-210 | 25 | |
| Tensile Strength (Mpa) | 1158 | 25 | oil quenched, fine grained, tempered at 425°C |
| Yield Strength (Mpa) | 1034 | ||
| Elongation (%) | 15 | ||
| Reduction in Area (%) | 53 | ||
| Hardness (HB) | 335 | 25 | oil quenched, fine grained, tempered at 425°C |
Thermal Properties
| Properties | Conditions | ||
|---|---|---|---|
| T (°C) | Treatment | ||
| Thermal Conductivity (W/m-K) | 42.7 | 100 | |
| Specific Heat (J/kg-K) | 477 | 50-100 | |
Physical Properties
| Quantity | Value | Unit |
|---|---|---|
| Thermal expansion | 16 - 17 | e-6/K |
| Thermal conductivity | 16 - 16 | W/m.K |
| Specific heat | 500 - 500 | J/kg.K |
| Melting temperature | 1370 - 1400 | °C |
| Service temperature | 0 - 500 | °C |
| Density | 8000 - 8000 | kg/m3 |
| Resistivity | 0.7 - 0.7 | Ohm.mm2/m |
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