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4340 STEEL | 1.6582 STEEL | 34CrNiMo6 STEEL | EN24 STEEL | 34CrNiMo6 STEEL |   38Х2Н2МА STEEL | ALLOY STEEL

 

» 4340 Chemical Composition (%)

| C 0.38-0.43 | Si 0.15-0.35 | Mn 0.60-0.80 | P 0.035 max. | S 0.04 max. | Cr 0.70-0.90 | Mo 0.20-0.30 | Ni 1.65-2.00|

 

 

» Product availability

Hot rolled round, square and flat bars 4340 | 1.6582 steel.

Forged round, square and flat bars 4340 | 1.6582 steel.

Cold Drawing round, square and flat bars 4340 | 1.6582 steel.

Machining bars 4340 | 1.6582 steel.

 

» AISI Alloy 4340 Steel Mechanical Properties

Mechannical Properties

(Heat Treated Condition )

Condition Ruling section
mm
Tensile Strength MPa Yield Strength
MPa
Elong.
%
Izod Impact
J
Brinell
Hardness
T 250 850-1000 635 13 40 248-302
T 150 850-1000 665 13 54 248-302
U 100 930-1080 740 12 47 269-331
V 63 1000-1150 835 12 47 293-352
W 30 1080-1230 925 11 41 311-375
X 30 1150-1300 1005 10 34 341-401
Y 30 1230-1380 1080 10 24 363-429
Z 30 1555- 1125 5 10 444-

 

» Welding

Welding of steel 4340 in the hardened and tempered condition (as normally supplied), is not recommended and should be avoided if at all possible, because of the danger of quench cracking, as the mechanical properties will be altered within the weld heat affected zone.

If welding must be carried out, pre-heat to 200 to 300°C and maintain this while welding. Immediately after welding stress relieve at 550 to 650°C, prior to hardening and tempering.

If welding in the hardened and tempered condition is really necessary, then the work piece, immediately on cooling to hand warm, should be if possible stress relieved at 15 °C below the original tempering temperature.

 

 

» 4340 | 1.6582 steel Application.

AISI 4340 steel is used in most industry sectors for applications requiring higher tensile/yield strength than 4140 steel can provide.

Some typical applications such as:

  • Aircraft Landing Gear
  • Automotive,
  • Oil and Gas Drilling,
  • Forging,
  • Warm and Cold Forming,
  • Machine Building,
  • Transfer Systems, like power transmission gears and shafts.
  • General engineering industries and structural use applications, such as: heavy duty shafts, gears, axles, spindles, couplings, pins, chucks, molds etc.

 

 

 

 

 

Products » Raw Materials » Grade


Tool Steel


Stainless Steel


Alloy Structual Steel


High Speed Steel


Plastic Mould Steel


Carbon Steel


Cast Iron


 

Cold Work Tool Steel

› 1.2379 | D2

› 1.2080 | D3

› 1.2436 | D6

› 1.2746

› 1.2510 | O1

› 1.2842 | O2

Hot Work Tool Steel

› 1.2344 | H13

› 1.2343 | H11

› 1.2714 | L6 | SKD4

 

 

 

 

› AISI440C | W.Nr 1.4125 | X105CrMo17

AISI440B | W.Nr 1.4112 | X90CrMoV18

› AISI420 | W.Nr.1.4034 | X46Cr13

› AISI630 | W.Nr.1.4542 | 17-4ph

W.Nr 1.2360 | X48CrMoV8-1-1

 

 

 

 

› 4140 | 1.7225 | 42CrMo4 |EN19 |SCM440

› 4340 | 1.6582 | 34CrNiMo6 | EN24

› 5140 | 41Cr4 | SCR440

› 8620 | 1.6523 | 20NiCrMo2-2 | SNCM220

› 16MnCr5 | 1.7131

› 1.0577 | S355J2

 

 

 

 

 

 

› 4341

› 4241

› M2 | 1.3343 | SKH51 | 6542

› M35 | 1.3243 | SKH55

› M42 | 1.3247 | SKH59

 

 

 

 

›1.2311 | P20 | 3Cr2Mo

› 1.2312 | P20+S

› 1.2738 | P20+Ni

› 1.2316 | S136 | 4Cr13

› 1.2083 | 420 |SUS420J2 | X42Cr13

› 718 | 718H

› NAK80 | P21

› 1.2767 | X45NiCrMo4 | 6F

 

› 1.1191 | C45 | CK45 | 1045 | S45C

› 1.0540 | C50 | CK50 | 1050 | S50C

 

› EN-GJS-400-18

› EN-GJS-400-15

› EN-GJS-450-10

› EN-GJS-500-7

› EN-GJS-600-3

› EN-GJS-700-2

 

 

 

 

 
     
     
     

 

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