Value of your cart over $1000? Chat or Call us For an additional discount!4140 Alloy Steel
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Alloy Steel 4140 has high strength, high fatigue strength, toughness, torsional strength, and impact and abrasion resistance. Additionally, 4140 steel is highly ductile when annealed, though it requires more pressure as it is tougher than most carbon steels. 4140 is easily welded, but if this is done after hardening, it will also require a post weld heat treatment. This material is typically used in aerospace, oil, gas, automotive, agricultural, and defense industries, specifically gears, shafts, spindles, fixtures, and collars.
We offer 4140 in round tube, metric round tube, hex bar, metric hex bar, cold finish hex bar, rectangle bar, round bar, metric round bar, sheet plate, annealed sheet plate, and precision blanks.
Relevant Knowledge Hub Resources: 5 Reasons to Cut-to-Size | The Weldability of Steel
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Pricing and availability for this item changes frequently. Contact us now for a fast quote.
Pricing and availability for this item changes frequently. Contact us now for a fast quote.
Dimensions
- Ships In: 1-3 Days
- Thickness: 1"
- Cut Type: Thickness Precision Ground/milled, Width & Length Precision Milled
- Tolerance: All Dimensions +/- .002˝
Sold and shipped by TCI Precision Metals
Pricing and availability for this item changes frequently. Contact us now for a fast quote.
Dimensions
- Ships In: 1-3 Days
- Thickness: 0.5"
- Cut Type: Thickness Precision Ground/milled, Width & Length Precision Milled
- Tolerance: All Dimensions +/- .002˝
Sold and shipped by TCI Precision Metals
Dimensions
- Ships In: 1-3 Days
- Thickness: 0.25"
- Cut Type: Thickness Precision Ground/milled, Width & Length Precision Milled
- Tolerance: All Dimensions +/- .002˝
Sold and shipped by TCI Precision Metals
Dimensions
- Ships In: 1-3 Days
- Thickness: 0.375"
- Cut Type: Thickness Precision Ground/milled, Width & Length Precision Milled
- Tolerance: All Dimensions +/- .002˝
Sold and shipped by TCI Precision Metals
- Dia. 0.5625"
Alloy Steel Round Bar 4140-Annealed Cold Finish
Select...
- 12″ (1 ft.) - $8.50 ea.
- 24″ (2 ft.) - $16.34 ea.
-
36″ (3 ft.)
- $22.99 ea.
- 48″ (4 ft.) - $27.26 ea.
- 72″ (6 ft.) - $37.83 ea.
- 96″ (8 ft.) - $47.70 ea.
- 144″ (12 ft.) - $65.44 ea.
- Custom Cut
Starting at
$8.50
$8.50
$8.50 ea.
- Dia. 0.5"
Alloy Steel Round Bar 4140-Annealed Cold Finish
Select...
- 12″ (1 ft.) - $8.54 ea.
- 24″ (2 ft.) - $16.42 ea.
-
36″ (3 ft.)
- $23.12 ea.
- 48″ (4 ft.) - $27.47 ea.
- 72″ (6 ft.) - $38.19 ea.
- 96″ (8 ft.) - $48.24 ea.
- 144″ (12 ft.) - $68.34 ea.
- Custom Cut
Starting at
$8.54
$8.54
$8.54 ea.
- Dia. 0.625"
Alloy Steel Round Bar 4140-Annealed Cold Finish
Select...
- 12″ (1 ft.) - $8.73 ea.
- 24″ (2 ft.) - $16.82 ea.
-
36″ (3 ft.)
- $23.86 ea.
- 48″ (4 ft.) - $28.66 ea.
- 72″ (6 ft.) - $40.15 ea.
- 96″ (8 ft.) - $51.04 ea.
- 144″ (12 ft.) - $72.77 ea.
- Custom Cut
Starting at
$8.73
$8.73
$8.73 ea.
- Dia. 0.6875"
Alloy Steel Round Bar 4140-Annealed Cold Finish
Select...
- 12″ (1 ft.) - $10.48 ea.
- 24″ (2 ft.) - $20.16 ea.
-
36″ (3 ft.)
- $28.38 ea.
- 48″ (4 ft.) - $33.74 ea.
- 72″ (6 ft.) - $46.91 ea.
- 96″ (8 ft.) - $59.26 ea.
- 144″ (12 ft.) - $83.95 ea.
- Custom Cut
Starting at
$10.48
$10.48
$10.48 ea.
- Dia. 0.875"
Alloy Steel Round Bar 4140-Annealed Cold Finish
Select...
- 12″ (1 ft.) - $13.08 ea.
- 24″ (2 ft.) - $25.11 ea.
-
36″ (3 ft.)
- $35.37 ea.
- 48″ (4 ft.) - $42.03 ea.
- 72″ (6 ft.) - $58.43 ea.
- 96″ (8 ft.) - $73.80 ea.
- 144″ (12 ft.) - $104.55 ea.
- Custom Cut
Starting at
$13.08
$13.08
$13.08 ea.
- Dia. 0.75"
Alloy Steel Round Bar 4140-Annealed Cold Finish
Select...
- 12″ (1 ft.) - $15.05 ea.
- 24″ (2 ft.) - $28.93 ea.
-
36″ (3 ft.)
- $40.73 ea.
- 48″ (4 ft.) - $48.42 ea.
- 72″ (6 ft.) - $67.30 ea.
- 96″ (8 ft.) - $85.01 ea.
- 144″ (12 ft.) - $120.45 ea.
- Custom Cut
Starting at
$15.05
$15.05
$15.05 ea.
- Dia. 1"
Alloy Steel Round Bar 4140-Annealed Cold Finish
Select...
- 12″ (1 ft.) - $26.52 ea.
- 24″ (2 ft.) - $50.92 ea.
-
36″ (3 ft.)
- $71.64 ea.
- 48″ (4 ft.) - $84.90 ea.
- 72″ (6 ft.) - $117.80 ea.
- 96″ (8 ft.) - $148.57 ea.
- 144″ (12 ft.) - $203.77 ea.
- Custom Cut
Starting at
$26.52
$26.52
$26.52 ea.
- Hex 1"
Alloy Steel Hex Bar 4140/4142-Cold Finish
Select...
- 12″ (1 ft.) - $31.92 ea.
- 24″ (2 ft.) - $61.31 ea.
-
36″ (3 ft.)
- $86.22 ea.
- 48″ (4 ft.) - $102.18 ea.
- 72″ (6 ft.) - $141.77 ea.
- 96″ (8 ft.) - $207.93 ea.
- 144″ (12 ft.) - $283.54 ea.
- Custom Cut
Starting at
$31.92
$31.92
$31.92 ea.
- Dia. 1.25"
Alloy Steel Round Bar 4140-Annealed Cold Finish
Select...
- 12″ (1 ft.) - $34.30 ea.
- 24″ (2 ft.) - $65.88 ea.
-
36″ (3 ft.)
- $92.65 ea.
- 48″ (4 ft.) - $109.82 ea.
- 72″ (6 ft.) - $152.36 ea.
- 96″ (8 ft.) - $192.18 ea.
- 144″ (12 ft.) - $263.56 ea.
- Custom Cut
Starting at
$34.30
$34.30
$34.30 ea.
- Dia. 1.5"
Alloy Steel Round Bar 4140-Annealed Cold Finish
Select...
- 12″ (1 ft.) - $36.97 ea.
- 24″ (2 ft.) - $71.31 ea.
-
36″ (3 ft.)
- $100.97 ea.
- 48″ (4 ft.) - $121.34 ea.
- 72″ (6 ft.) - $170.04 ea.
- 96″ (8 ft.) - $216.05 ea.
- 144″ (12 ft.) - $308.12 ea.
- Custom Cut
Starting at
$36.97
$36.97
$36.97 ea.
- Hex 1.25"
Alloy Steel Hex Bar 4140/4142-Cold Finish
Select...
- 12″ (1 ft.) - $37.51 ea.
- 24″ (2 ft.) - $72.01 ea.
-
36″ (3 ft.)
- $101.25 ea.
- 48″ (4 ft.) - $120.01 ea.
- 72″ (6 ft.) - $149.88 ea.
- 96″ (8 ft.) - $219.82 ea.
- 144″ (12 ft.) - $299.76 ea.
- Custom Cut
Starting at
$37.51
$37.51
$37.51 ea.
- Dia. 1.75"
Alloy Steel Round Bar 4140-Annealed Cold Finish
Select...
- 12″ (1 ft.) - $44.63 ea.
- 24″ (2 ft.) - $85.69 ea.
-
36″ (3 ft.)
- $120.47 ea.
- 48″ (4 ft.) - $142.79 ea.
- 72″ (6 ft.) - $198.12 ea.
- 96″ (8 ft.) - $290.58 ea.
- 144″ (12 ft.) - $396.24 ea.
- Custom Cut
Starting at
$44.63
$44.63
$44.63 ea.
- Dia. 1.625"
Alloy Steel Round Bar 4140-Annealed Cold Finish
Select...
- 12″ (1 ft.) - $58.91 ea.
- 24″ (2 ft.) - $113.58 ea.
-
36″ (3 ft.)
- $160.83 ea.
- 48″ (4 ft.) - $193.25 ea.
- 72″ (6 ft.) - $270.81 ea.
- 96″ (8 ft.) - $344.13 ea.
- Custom Cut
Starting at
$58.91
$58.91
$58.91 ea.
- Dia. 1.875"
Alloy Steel Round Bar 4140-Annealed Cold Finish
Select...
- 12″ (1 ft.) - $67.92 ea.
- 24″ (2 ft.) - $130.40 ea.
-
36″ (3 ft.)
- $183.37 ea.
- 48″ (4 ft.) - $217.33 ea.
- 72″ (6 ft.) - $301.54 ea.
- 96″ (8 ft.) - $442.26 ea.
- 144″ (12 ft.) - $603.08 ea.
- Custom Cut
Starting at
$67.92
$67.92
$67.92 ea.
Sold and shipped by TCI Precision Metals
- Ships In 1-3 Days |
- Thick 1" |
- Cut Type Thickness Precision Ground/milled, Width & Length Precision Milled
-
--
- Tolerance All Dimensions +/- .002˝
Precision Ground/Milled 1.000" 4140 Alloy Steel
Select...
- 2.0″ X 11.75″ (2.0 X 11.75 in.) - $70.39 ea.
- 4.0″ X 11.75″ (4.0 X 11.75 in.) - $113.02 ea.
- 6.0″ X 5.75″ (6.0 X 5.75 in.) - $181.22 ea.
- 6.0″ X 11.75″ (6.0 X 11.75 in.) - $337.13 ea.
- 12.0″ X 11.75″ (12.0 X 11.75 in.) - $628.69 ea.
Starting at
$70.39
$70.39
$70.39 ea.
- Hex 1.75"
Alloy Steel Hex Bar 4140/4142-Cold Finish
Select...
- 12″ (1 ft.) - $80.15 ea.
- 24″ (2 ft.) - $153.86 ea.
-
36″ (3 ft.)
- $216.38 ea.
- 48″ (4 ft.) - $256.46 ea.
- 72″ (6 ft.) - $355.83 ea.
- 96″ (8 ft.) - $448.79 ea.
- 144″ (12 ft.) - $634.72 ea.
- Custom Cut
Starting at
$80.15
$80.15
$80.15 ea.
- Dia. 2"
Alloy Steel Round Bar 4140-Annealed Cold Finish
Select...
- 12″ (1 ft.) - $84.31 ea.
- 24″ (2 ft.) - $162.57 ea.
-
36″ (3 ft.)
- $230.17 ea.
- 48″ (4 ft.) - $273.49 ea.
- 72″ (6 ft.) - $380.60 ea.
- 96″ (8 ft.) - $480.13 ea.
- 144″ (12 ft.) - $729.31 ea.
- Custom Cut
Starting at
$84.31
$84.31
$84.31 ea.
- Dia. 2.5"
Alloy Steel Round Bar 4140-Annealed Cold Finish
Select...
- 12″ (1 ft.) - $89.64 ea.
- 24″ (2 ft.) - $174.05 ea.
-
36″ (3 ft.)
- $253.23 ea.
- 48″ (4 ft.) - $327.19 ea.
- 72″ (6 ft.) - $459.41 ea.
- 96″ (8 ft.) - $570.71 ea.
- 144″ (12 ft.) - $806.76 ea.
- Custom Cut
Starting at
$89.64
$89.64
$89.64 ea.
Sold and shipped by TCI Precision Metals
- Ships In 1-3 Days |
- Thick 0.5" |
- Cut Type Thickness Precision Ground/milled, Width & Length Precision Milled
-
--
- Tolerance All Dimensions +/- .002˝
Precision Ground/Milled .500" 4140 Alloy Steel
Select...
- 2.0″ X 11.75″ (2.0 X 11.75 in.) - $90.30 ea.
- 4.0″ X 11.75″ (4.0 X 11.75 in.) - $141.69 ea.
- 6.0″ X 5.75″ (6.0 X 5.75 in.) - $113.56 ea.
- 6.0″ X 11.75″ (6.0 X 11.75 in.) - $196.11 ea.
- 12.0″ X 11.75″ (12.0 X 11.75 in.) - $358.76 ea.
Starting at
$90.30
$90.30
$90.30 ea.
Sold and shipped by TCI Precision Metals
- Ships In 1-3 Days |
- Thick 0.25" |
- Cut Type Thickness Precision Ground/milled, Width & Length Precision Milled
-
--
- Tolerance All Dimensions +/- .002˝
Precision Ground/Milled .250" 4140 Alloy Steel
Select...
- 2.0″ X 11.75″ (2.0 X 11.75 in.) - $92.72 ea.
- 4.0″ X 11.75″ (4.0 X 11.75 in.) - $141.13 ea.
- 6.0″ X 5.75″ (6.0 X 5.75 in.) - $122.01 ea.
- 6.0″ X 11.75″ (6.0 X 11.75 in.) - $210.38 ea.
- 12.0″ X 11.75″ (12.0 X 11.75 in.) - $340.39 ea.
Starting at
$92.72
$92.72
$92.72 ea.
Sold and shipped by TCI Precision Metals
- Ships In 1-3 Days |
- Thick 0.375" |
- Cut Type Thickness Precision Ground/milled, Width & Length Precision Milled
-
--
- Tolerance All Dimensions +/- .002˝
Precision Ground/Milled .375" 4140 Alloy Steel
Select...
- 2.0″ X 11.75″ (2.0 X 11.75 in.) - $96.76 ea.
- 4.0″ X 11.75″ (4.0 X 11.75 in.) - $144.19 ea.
- 6.0″ X 5.75″ (6.0 X 5.75 in.) - $114.68 ea.
- 6.0″ X 11.75″ (6.0 X 11.75 in.) - $198.35 ea.
- 12.0″ X 11.75″ (12.0 X 11.75 in.) - $365.88 ea.
Starting at
$96.76
$96.76
$96.76 ea.
- Hex 2"
Alloy Steel Hex Bar 4140/4142-Cold Finish
Select...
- 12″ (1 ft.) - $99.72 ea.
- 24″ (2 ft.) - $191.44 ea.
-
36″ (3 ft.)
- $246.51 ea.