CNC Machining 38CrMoAl Steel Parts
38CrMoAl Steel Is A High Grade Nitrided Steel With High Wear Resistance, High Fatigue Strength And High Strength.It Is Mainly Used For Nitriding Parts With Precise Dimensions After Heat Treatment, Or Various Nitride Parts With High Impact Load And High Wear Resistance, Such As Mast, Grinding Machine Spindle, Automatic Lathe Spindle, Worm, Precision Screw, Precision Gear, High Pressure Valves, Valve Stems, Gauges, Templates, Rollers, Imitation Molds, Cylinder Blocks, Compressor Piston Rods, Governors On Rotary Turbines, Rotating Sleeves, Fixed Sleeves, Various Wear Parts On Rubber And Plastic Extruders, Etc. .
Standard: GB/T 3077-1999, Steel Plate GB/T1251-2009 And WuYang Enterprise Standard
Features And Scope Of Application:
38CrMoAl Has High Surface Hardness, Wear Resistance And Fatigue Strength, And Has Good Heat Resistance And Corrosion Resistance, And Low Hardenability.It Is Used To Make Nitriding Parts With High Wear Resistance, High Fatigue Strength And Considerable Strength, And High Dimensional Accuracy After Treatment, Such As Imitation Mold, Cylinder Liner, Gear, High Pressure Valve, Mast, Worm, Grinding Machine Spindle And So On.However, Larger Parts Are Not Suitable.
Chemical Composition:
C：0.35～0.42
Si：0.20～0.45
Mn：0.30～0.60
S : Allow Residual Content ≤0.035
P : Allowable Residual Content ≤0.035
Cr：1.35～1.65
Al：0.70～1.10
Ni: Allowable Residual Content ≤ 0.30
Cu: Allowable Residual Content ≤ 0.30
Mo：0.15～0.25
Density: 7.85g/cm3
Mechanical Properties:
Tensile Strength σb (MPa): ≥ 980 (100)
Yield Strength σs (MPa): ≥ 835 (85)
Elongation δ5 (%): ≥14
Area Shrinkage ψ (%): ≥ 50
Impact Work Akv (J): ≥71
Impact Toughness Value αkv (J/cm2): ≥88(9)
Hardness: ≤229hb
Sample Size: Sample Blank Size Is 30mm
Heat Treatment Specification
Heat Treatment Specifications And Metallographic Organization:
Heat Treatment Specification: Quenching 940 ° C, Water-Cooled, Oil-Cooled; Tempered 640 ° C, Water-Cooled, Oil-Cooled.
Delivery Status: Delivered In (Normalized, Annealed Or High Temperature Tempered) Or Not Heat Treated, The Delivery Status Should Be Stated In The Contract.
Annealed Annealing No.1 “760±10 °C Annealing, Furnace Cooling To 400 ° C Air Cooling.
Chinese And Foreign Brand Comparison
China GB/T3077: 38CrMoAl
International Standard ISO: 41CrAlMo74
Former Soviet Union гост: 38x2mюa (38xmюa)
American ASTM: –
US UNS: –
Japanese JIS: SACM645
German DIN: 41CrAlMo7 34CrAlMo5
British BS: 905M39 905M31
France NF: 40CAD6.12 30CAD6.12
Weight Calculation Formula
Round Steel: Weight Per Metre (Kg) = 0.00617 × Diameter × Diameter (Note: Rebar And Round Steel Are The Same)
Flat Steel: Weight Per Kilometer (Kg) = 0.00785 × Thickness × Side Width
Pipe: Weight Per Meter (Kg) = 0.02466 × Wall Thickness × (Outer Diameter – Wall Thickness)
Plate: Weight Per Meter (Kg) = 0.785 × Thickness
| Material | Specifications Length (MM) | Weight | Alloy Steel | Product Name |
| 38CrMoAl | 3.0-25 | 50t | Alloy Steel | Bright Round Bar |
| 38CrMoAl | 12-50 | 50t | Alloy Steel | Hot Rolled Round Steel |
| 38CrMoAl | ф100-130 | 50t | Alloy Steel | Hot Rolled Round Steel |
| 38CrMoAl | ф140-150 | 50t | Alloy Steel | Hot Rolled Round Steel |
| 38CrMoAl | ф160-170 | 50t | Alloy Steel | Hot Rolled Round Steel |
| 38CrMoAl | ф16-40 | 50t | Alloy Steel | Hot Rolled Round Steel |
| 38CrMoAl | ф200-280 | 50t | Alloy Steel | Hot Rolled Round Steel |
| 38CrMoAl | ф50-70 | 50t | Alloy Steel | Hot Rolled Round Steel |
| 38CrMoAl | ф50-90 | 50t | Alloy Steel | Hot Rolled Round Steel |
| 38CrMoAl | ф50-95 | 50t | Alloy Steel | Hot Rolled Round Steel |
| Material | Specifications Length (Mm) | Fixed Rolling | Alloy Steel | Product Name |
| 38CrMoAl | 8-10 | 50t | Alloy Steel | Hot Rolled Steel Sheet |
| 38CrMoAl | 12-16 | 50t | Alloy Steel | Hot Rolled Steel Sheet |
| 38CrMoAl | 18-20 | 50t | Alloy Steel | Hot Rolled Steel Sheet |
| 38CrMoAl | 22-28 | 50t | Alloy Steel | Hot Rolled Steel Sheet |
| 38CrMoAl | 30-34 | 50t | Alloy Steel | Hot Rolled Steel Sheet |
| 38CrMoAl | 80-100 | 50t | Alloy Steel | Forged Steel Plate |
| 38CrMoAl | 160 | Fixed Rolling | Alloy Steel | Forged Steel Plate |
| 38CrMoAl | 170 | Fixed Rolling | Alloy Steel | Forged Steel Plate |
| 38CrMoAl | 180 | Fixed Rolling | Alloy Steel | Forged Steel Plate |