General Information: | ||
---|---|---|
Material Group | P - Steel | |
Sub-Group | Low Alloy Steel | |
Hardness | 259.0 HB | |
Tensile Strength | 890 [N/mm^2] | |
Machinability | 57% |
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Machining Steel 4340
SAE 4340 is Nickel-chromium-molybdenum steel produced with 1.65-2% nickel and 0.7–0.9% chromium content. It has good hardenability, strength, wear resistance, toughness, and ductility. 4340 Steel is used mainly on piston pins, bearings, gears, machine tool arbors, die blocks, and cutting tool shanks.
The hardness of these steels depends on the heat treatment:
The average machinability rating of 4340 steel is around 55% (Annealed condition).
You can find here a list of machinability Ratings for different Low Alloy Steels.
Summery:
Equivalent International Designations for Steel 4340
Standard | Name |
---|---|
sae | 4340 |
wnr | 1.6582 |
din | 35CrNiMo6 |
bs | 817M40 |
ss | 2541 |
anfor | 35NCD6 |
uni | 35NiCrMo6(KB) |
unf | F.1280 |
Chemical Composition for Steel 4340
Element | Amount |
---|---|
Nickel (Ni) | 1.65-2.00% |
Chromium (Cr) | .70-.90% |
Manganese (Mn) | .60-.80% |
Carbon (C) | .38-.43% |
Molybdenum (Mo) | .20-.30% |
Cutting Speeds Recomendations for Steel 4340
* Click on the speeds below for higher precision in specific conditions!
Application | Vc (m/min) | Vc (SFM) |
---|---|---|
Turning | 215-290 | 710-950 |
Milling | 130-180 | 430-590 |
Parting | 100-140 | 330-460 |
Grooving | 120-160 | 390-520 |
Drilling | 85-115 | 280-380 |
Important! The speed estimation is given for an ideal situation:
- Most suitable carbide grade
- Stable tool clamping
- Stable workpiece clamping
- Good quality raw material
- A short overhang of the cutting tool.
- Nominal hardness of the material.
- etc.
Click on the speeds in the above table to get better precision for specific parameters
Or use our Speed and Feed Calculator
Recommended Carbide Grades for Steel 4340
* If you do nott understand the below table? Read This Explanation to make the most out of it!
Grade for Turning
Brand | Grade | ISO | Material | app | App | Coating | Apps Range | 05 | 10 | 15 | 20 | 25 | 30 | 35 | 40 | 45 |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Sandvik | GC1115 | P | P - Steel | T | Turning | PVD | P05 - P20 | P | P | P | P | |||||
Sandvik | GC4305 | P | P - Steel | T | Turning | CVD | P05 - P10 | P | P | |||||||
Sandvik | GC4415 (GC4315) | P | P - Steel | T | Turning | CVD | P10 - P15 | P | P | |||||||
Sandvik | GC4425 (GC4325) | P | P - Steel | T | Turning | CVD | P15 - P30 | P | P | P | P | |||||
Sandvik | GC1125 | P | P - Steel | T | Turning | PVD | P20 - P30 | P | P | P | ||||||
Sandvik | GC4335 | P | P - Steel | T | Turning | CVD | P30 - P40 | P | P | P | ||||||
Iscar | IC807 (IC907) | P | P - Steel | T | Turning | PVD | P05 - P25 | P | P | P | P | P | ||||
Iscar | IC8150 | P | P - Steel | T | Turning | CVD | P10 - P15 | P | P | |||||||
Iscar | IC8250 | P | P - Steel | T | Turning | CVD | P15 - P30 | P | P | P | P | |||||
Iscar | IC830 (IC328) | P | P - Steel | T | Turning | PVD | P25 - P45 | P | P | P | P | P | ||||
Kennametal | KCP05B (KCP05) | P | P - Steel | T | Turning | CVD | P05 - P10 | P | P | |||||||
Kennametal | KCU10 (KC5010) | P | P - Steel | T | Turning | PVD | P10 - P20 | P | P | P | ||||||
Kennametal | KCP10B (KCP10) | P | P - Steel | T | Turning | CVD | P10 - P20 | P | P | P | ||||||
Kennametal | KCP25B (KCP25) | P | P - Steel | T | Turning | CVD | P20 - P30 | P | P | P | ||||||
Kennametal | KCU25 (KC5025) | P | P - Steel | T | Turning | PVD | P20 - P30 | P | P | P | ||||||
Kennametal | KCP30 | P | P - Steel | T | Turning | CVD | P30 - P40 | P | P | P | ||||||
Kennametal | KCP40B (KCP40) | P | P - Steel | T | Turning | CVD | P35 - P45 | P | P | P | ||||||
Walter | WPP10S (WPP10) | P | P - Steel | T | Turning | CVD | P05 - P20 | P | P | P | P | |||||
Walter | WPP05S (WPP05) | P | P - Steel | T | Turning | CVD | P05 - P15 | P | P | P | ||||||
Walter | WPP20S (WPP20) | P | P - Steel | T | Turning | CVD | P10 - P30 | P | P | P | P | P | ||||
Walter | WPP30S (WPP30) | P | P - Steel | T | Turning | CVD | P20 - P40 | P | P | P | P | P | ||||
Seco | TP0501 | P | P - Steel | T | Turning | CVD | P05 - P20 | P | P | P | P | |||||
Seco | TH1500 | P | P - Steel | T | Turning | CVD | P05 - P05 | P | ||||||||
Seco | TP1501 | P | P - Steel | T | Turning | CVD | P10 - P25 | P | P | P | P | |||||
Seco | TP2501 | P | P - Steel | T | Turning | CVD | P15 - P35 | P | P | P | P | P | ||||
Seco | CP500 | P | P - Steel | T | Turning | PVD | P15 - P40 | P | P | P | P | P | P | |||
Seco | CP600 | P | P - Steel | T | Turning | PVD | P25 - P45 | P | P | P | P | P | ||||
Seco | TP3501 | P | P - Steel | T | Turning | CVD | P30 - P40 | P | P | P | ||||||
Tungaloy | T9205 (T9105) | P | P - Steel | T | Turning | CVD | P05 - P10 | P | P | |||||||
Tungaloy | T9215 (T9115) | P | P - Steel | T | Turning | CVD | P10 - P20 | P | P | P | ||||||
Tungaloy | T9225 (T9125) | P | P - Steel | T | Turning | CVD | P15 - P25 | P | P | P | ||||||
Tungaloy | AH725 | P | P - Steel | T | Turning | PVD | P15 - P30 | P | P | P | P | |||||
Tungaloy | T9235 (T9135) | P | P - Steel | T | Turning | CVD | P30 - P40 | P | P | P | ||||||
Mitsubishi | UE6105 | P | P - Steel | T | Turning | CVD | P05 - P15 | P | P | P | ||||||
Mitsubishi | VP15TF | P | P - Steel | T | Turning | PVD | P10 - P30 | P | P | P | P | P | ||||
Mitsubishi | MC6015 (UE6010) | P | P - Steel | T | Turning | CVD | P10 - P20 | P | P | P | ||||||
Mitsubishi | MC6025 (UE6020) | P | P - Steel | T | Turning | CVD | P15 - P30 | P | P | P | P | |||||
Mitsubishi | MC6035 (UE6035) | P | P - Steel | T | Turning | CVD | P25 - P40 | P | P | P | P | |||||
Sumitomo | AC8015P (AC810P) | P | P - Steel | T | Turning | CVD | P05 - P15 | P | P | P | ||||||
Sumitomo | AC1030U | P | P - Steel | T | Turning | PVD | P10 - P30 | P | P | P | P | P | ||||
Sumitomo | AC8020P | P | P - Steel | T | Turning | CVD | P10 - P25 | P | P | P | P | |||||
Sumitomo | AC8025P (AC820P) | P | P - Steel | T | Turning | CVD | P15 - P30 | P | P | P | P | |||||
Sumitomo | AC8035P (AC830P) | P | P - Steel | T | Turning | CVD | P25 - P45 | P | P | P | P | P |
Grade for Parting Off
Brand | Grade | ISO | Material | app | App | Coating | Apps Range | 05 | 10 | 15 | 20 | 25 | 30 | 35 | 40 | 45 |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Sandvik | GC1125 | P | P - Steel | P | Parting | PVD | P05 - P20 | P | P | P | P | |||||
Sandvik | GC1135 | P | P - Steel | P | Parting | PVD | P15 - P35 | P | P | P | P | P | ||||
Iscar | IC808 (IC908) | P | P - Steel | P | Parting | PVD | P05 - P30 | P | P | P | P | P | P | |||
Iscar | IC830 (IC328) | P | P - Steel | P | Parting | PVD | P20 - P40 | P | P | P | P | P | ||||
Kennametal | KCU10 | P | P - Steel | P | Parting | PVD | P05 - P20 | P | P | P | P | |||||
Kennametal | KCU25 | P | P - Steel | P | Parting | PVD | P20 - P30 | P | P | P | ||||||
Walter | WKP13S | P | P - Steel | P | Parting | CVD | P05 - P20 | P | P | P | P | |||||
Walter | WSM23S | P | P - Steel | P | Parting | PVD | P10 - P30 | P | P | P | P | P | ||||
Walter | WSM33S (WSM33) | P | P - Steel | P | Parting | PVD | P20 - P40 | P | P | P | P | P | ||||
Walter | WSM43S | P | P - Steel | P | Parting | PVD | P30 - P45 | P | P | P | P | |||||
Seco | TGP45 | P | P - Steel | P | Parting | CVD | P10 - P45 | P | P | P | P | P | P | P | P | |
Seco | CP500 | P | P - Steel | P | Parting | PVD | P20 - P45 | P | P | P | P | P | P | |||
Seco | T350M | P | P - Steel | P | Parting | CVD | P25 - P45 | P | P | P | P | P | ||||
Seco | CP600 | P | P - Steel | P | Parting | PVD | P30 - P50 | P | P | P | P | |||||
Tungaloy | AH725 | P | P - Steel | P | Parting | PVD | P15 - P30 | P | P | P | P | |||||
Tungaloy | AH7025 | P | P - Steel | P | Parting | PVD | P20 - P30 | P | P | P | ||||||
Tungaloy | GH130 | P | P - Steel | P | Parting | PVD | P25 - P40 | P | P | P | P | |||||
Mitsubishi | VP10RT | P | P - Steel | P | Parting | PVD | P05 - P10 | P | P | |||||||
Mitsubishi | VP20RT | P | P - Steel | P | Parting | PVD | P10 - P30 | P | P | P | P | P | ||||
Mitsubishi | VP30RT | P | P - Steel | P | Parting | PVD | P20 - P40 | P | P | P | P | P | ||||
Sumitomo | AC1030U (AC530U) | P | P - Steel | P | Parting | PVD | P10 - P25 | P | P | P | P | |||||
Sumitomo | AC520U | P | P - Steel | P | Parting | PVD | P15 - P30 | P | P | P | P | |||||
Sumitomo | AC830P | P | P - Steel | P | Parting | CVD | P20 - P40 | P | P | P | P | P |
Grade for Grooving
Brand | Grade | ISO | Material | app | App | Coating | Apps Range | 05 | 10 | 15 | 20 | 25 | 30 | 35 | 40 | 45 |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Sandvik | GC1125 | P | P - Steel | G | Grooving | PVD | P05 - P35 | P | P | P | P | P | P | P | ||
Iscar | IC807 (IC907) | P | P - Steel | G | Grooving | PVD | P05 - P10 | P | P | |||||||
Iscar | IC808 (IC908) | P | P - Steel | G | Grooving | PVD | P10 - P25 | P | P | P | P | |||||
Iscar | IC830 (IC328) | P | P - Steel | G | Grooving | PVD | P20 - P40 | P | P | P | P | P | ||||
Kennametal | KCU10 | P | P - Steel | G | Grooving | PVD | P10 - P20 | P | P | P | ||||||
Kennametal | KC5010 | P | P - Steel | G | Grooving | PVD | P10 - P20 | P | P | P | ||||||
Kennametal | KC5025 | P | P - Steel | G | Grooving | PVD | P20 - P30 | P | P | P | ||||||
Kennametal | KCU25 | P | P - Steel | G | Grooving | PVD | P20 - P30 | P | P | P | ||||||
Walter | WKP13S | P | P - Steel | G | Grooving | CVD | P05 - P20 | P | P | P | P | |||||
Walter | WSM23S | P | P - Steel | G | Grooving | PVD | P10 - P30 | P | P | P | P | P | ||||
Walter | WSM33S (WSM33) | P | P - Steel | G | Grooving | PVD | P20 - P40 | P | P | P | P | P | ||||
Walter | WSM43S | P | P - Steel | G | Grooving | PVD | P30 - P45 | P | P | P | P | |||||
Seco | CP500 | P | P - Steel | G | Grooving | PVD | P10 - P25 | P | P | P | P | |||||
Seco | CP600 | P | P - Steel | G | Grooving | PVD | P20 - P40 | P | P | P | P | P | ||||
Tungaloy | AH725 | P | P - Steel | G | Grooving | PVD | P15 - P30 | P | P | P | P | |||||
Tungaloy | T9225 (T9125) | P | P - Steel | G | Grooving | CVD | P15 - P25 | P | P | P | ||||||
Tungaloy | AH7025 | P | P - Steel | G | Grooving | PVD | P20 - P30 | P | P | P | ||||||
Tungaloy | GH130 | P | P - Steel | G | Grooving | PVD | P25 - P40 | P | P | P | P | |||||
Mitsubishi | VP10RT | P | P - Steel | G | Grooving | PVD | P05 - P10 | P | P | |||||||
Mitsubishi | VP20RT | P | P - Steel | G | Grooving | PVD | P10 - P25 | P | P | P | P | |||||
Mitsubishi | MY5015 | P | P - Steel | G | Grooving | CVD | P10 - P20 | P | P | P | ||||||
Mitsubishi | VP30RT | P | P - Steel | G | Grooving | PVD | P20 - P40 | P | P | P | P | P | ||||
Sumitomo | AC1030U (AC530U) | P | P - Steel | G | Grooving | PVD | P10 - P25 | P | P | P | P | |||||
Sumitomo | AC520U | P | P - Steel | G | Grooving | PVD | P15 - P30 | P | P | P | P | |||||
Sumitomo | AC830P | P | P - Steel | G | Grooving | CVD | P20 - P40 | P | P | P | P | P |
Grade for Milling (Indexable)
Brand | Grade | ISO | Material | app | App | Coating | Apps Range | 05 | 10 | 15 | 20 | 25 | 30 | 35 | 40 | 45 |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Sandvik | GC4330 | P | P - Steel | M | Milling | CVD | P10 - P25 | P | P | P | P | |||||
Sandvik | GC4340 | P | P - Steel | M | Milling | CVD | P25 - P40 | P | P | P | P | |||||
Iscar | IC808 (IC908) | P | P - Steel | M | Milling | PVD | P05 - P15 | P | P | P | ||||||
Iscar | IC830 (IC928) | P | P - Steel | M | Milling | PVD | P10 - P40 | P | P | P | P | P | P | P | ||
Kennametal | KC510M | P | P - Steel | M | Milling | PVD | P05 - P10 | P | P | |||||||
Kennametal | KC522M | P | P - Steel | M | Milling | PVD | P10 - P25 | P | P | P | P | |||||
Kennametal | KCPK30 | P | P - Steel | M | Milling | CVD | P25 - P40 | P | P | P | P | |||||
Kennametal | KC725M | P | P - Steel | M | Milling | PVD | P30 - P40 | P | P | P | ||||||
Walter | WKP25S (WKP25) | P | P - Steel | M | Milling | CVD | P15 - P35 | P | P | P | P | P | ||||
Walter | WKP35G | P | P - Steel | M | Milling | CVD | P25 - P45 | P | P | P | P | P | ||||
Walter | WSP45S (WSP45S) | P | P - Steel | M | Milling | PVD | P35 - P45 | P | P | P | ||||||
Walter | WSM45X | P | P - Steel | M | Milling | CVD | P35 - P45 | P | P | P | ||||||
Seco | MP1501 | P | P - Steel | M | Milling | CVD | P05 - P20 | P | P | P | P | |||||
Seco | F40M | P | P - Steel | M | Milling | PVD | P05 - P50 | P | P | P | P | P | P | P | P | P |
Seco | MP2501 | P | P - Steel | M | Milling | CVD | P15 - P45 | P | P | P | P | P | P | P | ||
Tungaloy | AH120 | P | P - Steel | M | Milling | PVD | P15 - P25 | P | P | P | ||||||
Tungaloy | AH725 | P | P - Steel | M | Milling | PVD | P15 - P30 | P | P | P | P | |||||
Tungaloy | AH3225 | P | P - Steel | M | Milling | PVD | P20 - P35 | P | P | P | P | |||||
Tungaloy | T3225 | P | P - Steel | M | Milling | CVD | P20 - P35 | P | P | P | P | |||||
Tungaloy | AH130 | P | P - Steel | M | Milling | PVD | P25 - P40 | P | P | P | P | |||||
Tungaloy | AH3135 | P | P - Steel | M | Milling | PVD | P30 - P40 | P | P | P | ||||||
Mitsubishi | MP6120 | P | P - Steel | M | Milling | PVD | P10 - P30 | P | P | P | P | P | ||||
Mitsubishi | MP6130 | P | P - Steel | M | Milling | PVD | P20 - P40 | P | P | P | P | P | ||||
Mitsubishi | VP30RT | P | P - Steel | M | Milling | PVD | P25 - P45 | P | P | P | P | P | ||||
Sumitomo | ACP2000 | P | P - Steel | M | Milling | CVD | P05 - P25 | P | P | P | P | P | ||||
Sumitomo | XCU2500 | P | P - Steel | M | Milling | CVD | P05 - P30 | P | P | P | P | P | P | |||
Sumitomo | ACU2500 | P | P - Steel | M | Milling | PVD | P10 - P40 | P | P | P | P | P | P | P | ||
Sumitomo | ACP3000 | P | P - Steel | M | Milling | PVD | P20 - P45 | P | P | P | P | P | P |
Recommended Insert Cutting Edge Geometry for Steel 4340
Honing Size: | 0.05-0.08 mm / 0.002-0.003" | |
Rake Angle: | 11° -13° | |
Land Angle: | Positive | |
Land Width: | 0.20-0.30 mm / 0.008-0.012" |
Learn more about carbide inserts Cutting-Edge Geometry Parameters.