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4142

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4142 Product Guide Product   | 4142 Alloy Steel Tolerance Guide product

Alloy Steel 4142 is a medium carbon alloy steel with excellent toughness, ductility, wear resistance, and strength, 4142 is popular for a wide range of applications. It can be easily machined in the annealed state, but post treatment machining should be avoided. It is typically used in cams, drill collars, bolts, couplings, reamers axles, shafting, piston rods, rams, hydraulic shafts, gears, sprockets, valves, spindles, tools, boring tools, and other heavy duty machining components.

 

We carry 4142 alloy steel in rectangle bar.

 

Relevant Knowledge Hub Resources: 5 Reasons to Cut-to-Size | Understanding Steel

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5/16" x 2" Alloy Steel Rectangle Bar 4142-Prehardened Part # 19190

5/16" x 2" Alloy Steel Rectangle Bar 4142-Prehardened -
Part #: 19190
Select a Cut Size
  • 18″ (18 in.) - $124.98 ea.
  • 36″ (3 ft.) - $208.70 ea.
  • 72″ (6 ft.) - $396.29 ea.
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.

QTY

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$124.98 for 1
$124.98 ea.
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Dimensions

  • Thickness: 0.3125"
  • Width: 2"
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Material Meets These Standard(s): ASTM-A322

Key Features

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5/16" x 2 1/2" Alloy Steel Rectangle Bar 4142-Prehardened Part # 19199

5/16" x 2 1/2" Alloy Steel Rectangle Bar 4142-Prehardened -
Part #: 19199
Select a Cut Size
  • 18″ (18 in.) - $146.18 ea.
  • 36″ (3 ft.) - $244.03 ea.
  • 72″ (6 ft.) - $463.43 ea.
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.

QTY

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$146.18 for 1
$146.18 ea.
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Dimensions

  • Thickness: 0.3125"
  • Width: 2.5"
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Material Meets These Standard(s): ASTM-A322

Key Features

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5/16" x 3" Alloy Steel Rectangle Bar 4142-Prehardened Part # 19210

5/16" x 3" Alloy Steel Rectangle Bar 4142-Prehardened -
Part #: 19210
Select a Cut Size
  • 18″ (18 in.) - $168.40 ea.
  • 36″ (3 ft.) - $281.16 ea.
  • 72″ (6 ft.) - $533.89 ea.
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.

QTY

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$168.40 for 1
$168.40 ea.
Expand Details

Dimensions

  • Thickness: 0.3125"
  • Width: 3"
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Material Meets These Standard(s): ASTM-A322

Key Features

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5/16" x 3 1/2" Alloy Steel Rectangle Bar 4142-Prehardened Part # 19219

5/16" x 3 1/2" Alloy Steel Rectangle Bar 4142-Prehardened -
Part #: 19219
Select a Cut Size
  • 18″ (18 in.) - $205.60 ea.
  • 36″ (3 ft.) - $343.32 ea.
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.

QTY

Update
$205.60 for 1
$205.60 ea.
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Dimensions

  • Thickness: 0.3125"
  • Width: 3.5"
Click for more details alloy-steel-rectangle-bar-4142-prehardened-1superZoom
Material Meets These Standard(s): ASTM-A322

Key Features

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5/16" x 10" Alloy Steel Rectangle Bar 4142-Prehardened Part # 19260

5/16" x 10" Alloy Steel Rectangle Bar 4142-Prehardened -
Part #: 19260
Select a Cut Size
  • 18″ (18 in.) - $540.97 ea.
  • 36″ (3 ft.) - $903.17 ea.
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.

QTY

Update
$540.97 for 1
$540.97 ea.
Expand Details

Dimensions

  • Thickness: 0.3125"
  • Width: 10"
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Material Meets These Standard(s): ASTM-A322

Key Features

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5/16" Alloy Steel Square Bar 4142-Prehardened Part # 19356

5/16" Alloy Steel Square Bar 4142-Prehardened -
Part #: 19356
Select a Cut Size
  • 18″ (18 in.) - $74.68 ea.
  • 36″ (3 ft.) - $124.66 ea.
  • 72″ (6 ft.) - $236.65 ea.
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.

QTY

Update
$74.68 for 1
$74.68 ea.
Expand Details

Dimensions

  • Height: 0.3125"
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Material Meets These Standard(s): ASTM-A322

Key Features

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3/8" x 6" Alloy Steel Rectangle Bar 4142-Prehardened Part # 19247

3/8" x 6" Alloy Steel Rectangle Bar 4142-Prehardened -
Part #: 19247
Select a Cut Size
  • 18″ (18 in.) - $322.67 ea.
  • 36″ (3 ft.) - $538.70 ea.
  • 72″ (6 ft.) - $1,022.99 ea.
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.

QTY

Update
$322.67 for 1
$322.67 ea.
Expand Details

Dimensions

  • Thickness: 0.375"
  • Width: 6"
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Material Meets These Standard(s): ASTM-A322

Key Features

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3/8" x 8" Alloy Steel Rectangle Bar 4142-Prehardened Part # 19254

3/8" x 8" Alloy Steel Rectangle Bar 4142-Prehardened -
Part #: 19254
Select a Cut Size
  • 18″ (18 in.) - $475.42 ea.
  • 36″ (3 ft.) - $793.87 ea.
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.

QTY

Update
$475.42 for 1
$475.42 ea.
Expand Details

Dimensions

  • Thickness: 0.375"
  • Width: 8"
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Material Meets These Standard(s): ASTM-A322

Key Features

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3/8" x 5" Alloy Steel Rectangle Bar 4142-Prehardened Part # 19239

3/8" x 5" Alloy Steel Rectangle Bar 4142-Prehardened -
Part #: 19239
Select a Cut Size
  • 18″ (18 in.) - $276.25 ea.
  • 36″ (3 ft.) - $461.30 ea.
  • 72″ (6 ft.) - $876.00 ea.
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.

QTY

Update
$276.25 for 1
$276.25 ea.
Expand Details

Dimensions

  • Thickness: 0.375"
  • Width: 5"
Click for more details alloy-steel-rectangle-bar-4142-prehardened-1superZoom
Material Meets These Standard(s): ASTM-A322

Key Features

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3/8" x 3 1/2" Alloy Steel Rectangle Bar 4142-Prehardened Part # 19220

3/8" x 3 1/2" Alloy Steel Rectangle Bar 4142-Prehardened -
Part #: 19220
Select a Cut Size
  • 18″ (18 in.) - $223.43 ea.
  • 36″ (3 ft.) - $373.03 ea.
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.

QTY

Update
$223.43 for 1
$223.43 ea.
Expand Details

Dimensions

  • Thickness: 0.375"
  • Width: 3.5"
Click for more details alloy-steel-rectangle-bar-4142-prehardened-1superZoom
Material Meets These Standard(s): ASTM-A322

Key Features

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3/8" x 4" Alloy Steel Rectangle Bar 4142-Prehardened Part # 19230

3/8" x 4" Alloy Steel Rectangle Bar 4142-Prehardened -
Part #: 19230
Select a Cut Size
  • 18″ (18 in.) - $229.88 ea.
  • 36″ (3 ft.) - $383.86 ea.
  • 72″ (6 ft.) - $728.91 ea.
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.

QTY

Update
$229.88 for 1
$229.88 ea.
Expand Details

Dimensions

  • Thickness: 0.375"
  • Width: 4"
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Material Meets These Standard(s): ASTM-A322

Key Features

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3/8" x 1/2" Alloy Steel Rectangle Bar 4142-Prehardened Part # 19131

3/8" x 1/2" Alloy Steel Rectangle Bar 4142-Prehardened -
Part #: 19131
Select a Cut Size
  • 18″ (18 in.) - $70.80 ea.
  • 36″ (3 ft.) - $118.10 ea.
  • 72″ (6 ft.) - $224.37 ea.
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.

QTY

Update
$70.80 for 1
$70.80 ea.
Expand Details

Dimensions

  • Thickness: 0.375"
  • Width: 0.5"
Click for more details alloy-steel-rectangle-bar-4142-prehardened-1superZoom
Material Meets These Standard(s): ASTM-A322

Key Features

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3/8" x 5/8" Alloy Steel Rectangle Bar 4142-Prehardened Part # 19136

3/8" x 5/8" Alloy Steel Rectangle Bar 4142-Prehardened -
Part #: 19136
Select a Cut Size
  • 18″ (18 in.) - $76.85 ea.
  • 36″ (3 ft.) - $128.28 ea.
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.

QTY

Update
$76.85 for 1
$76.85 ea.
Expand Details

Dimensions

  • Thickness: 0.375"
  • Width: 0.625"
Click for more details alloy-steel-rectangle-bar-4142-prehardened-1superZoom
Material Meets These Standard(s): ASTM-A322

Key Features

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3/8" x 3/4" Alloy Steel Rectangle Bar 4142-Prehardened Part # 19144

3/8" x 3/4" Alloy Steel Rectangle Bar 4142-Prehardened -
Part #: 19144
Select a Cut Size
  • 18″ (18 in.) - $78.68 ea.
  • 36″ (3 ft.) - $131.38 ea.
  • 72″ (6 ft.) - $249.49 ea.
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.

QTY

Update
$78.68 for 1
$78.68 ea.
Expand Details

Dimensions

  • Thickness: 0.375"
  • Width: 0.75"
Click for more details alloy-steel-rectangle-bar-4142-prehardened-1superZoom
Material Meets These Standard(s): ASTM-A322

Key Features

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3/8" x 1" Alloy Steel Rectangle Bar 4142-Prehardened Part # 19153

3/8" x 1" Alloy Steel Rectangle Bar 4142-Prehardened -
Part #: 19153
Select a Cut Size
  • 18″ (18 in.) - $92.73 ea.
  • 36″ (3 ft.) - $154.85 ea.
  • 72″ (6 ft.) - $293.93 ea.
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.

QTY

Update
$92.73 for 1
$92.73 ea.
Expand Details

Dimensions

  • Thickness: 0.375"
  • Width: 1"
Click for more details alloy-steel-rectangle-bar-4142-prehardened-1superZoom
Material Meets These Standard(s): ASTM-A322

Key Features

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3/8" x 1 1/4" Alloy Steel Rectangle Bar 4142-Prehardened Part # 19161

3/8" x 1 1/4" Alloy Steel Rectangle Bar 4142-Prehardened -
Part #: 19161
Select a Cut Size
  • 18″ (18 in.) - $101.88 ea.
  • 36″ (3 ft.) - $170.16 ea.
  • 72″ (6 ft.) - $322.97 ea.
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.

QTY

Update
$101.88 for 1
$101.88 ea.
Expand Details

Dimensions

  • Thickness: 0.375"
  • Width: 1.25"
Click for more details alloy-steel-rectangle-bar-4142-prehardened-1superZoom
Material Meets These Standard(s): ASTM-A322

Key Features

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3/8" x 1 1/2" Alloy Steel Rectangle Bar 4142-Prehardened Part # 19172

3/8" x 1 1/2" Alloy Steel Rectangle Bar 4142-Prehardened -
Part #: 19172
Select a Cut Size
  • 18″ (18 in.) - $114.00 ea.
  • 36″ (3 ft.) - $190.22 ea.
  • 72″ (6 ft.) - $361.35 ea.
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.

QTY

Update
$114.00 for 1
$114.00 ea.
Expand Details

Dimensions

  • Thickness: 0.375"
  • Width: 1.5"
Click for more details alloy-steel-rectangle-bar-4142-prehardened-1superZoom
Material Meets These Standard(s): ASTM-A322

Key Features

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3/8" x 1 3/4" Alloy Steel Rectangle Bar 4142-Prehardened Part # 19181

3/8" x 1 3/4" Alloy Steel Rectangle Bar 4142-Prehardened -
Part #: 19181
Select a Cut Size
  • 18″ (18 in.) - $133.50 ea.
  • 36″ (3 ft.) - $222.86 ea.
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.

QTY

Update
$133.50 for 1
$133.50 ea.
Expand Details

Dimensions

  • Thickness: 0.375"
  • Width: 1.75"
Click for more details alloy-steel-rectangle-bar-4142-prehardened-1superZoom
Material Meets These Standard(s): ASTM-A322

Key Features

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3/8" x 2" Alloy Steel Rectangle Bar 4142-Prehardened Part # 19191

3/8" x 2" Alloy Steel Rectangle Bar 4142-Prehardened -
Part #: 19191
Select a Cut Size
  • 18″ (18 in.) - $137.17 ea.
  • 36″ (3 ft.) - $228.94 ea.
  • 72″ (6 ft.) - $434.82 ea.
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.

QTY

Update
$137.17 for 1
$137.17 ea.
Expand Details

Dimensions

  • Thickness: 0.375"
  • Width: 2"
Click for more details alloy-steel-rectangle-bar-4142-prehardened-1superZoom
Material Meets These Standard(s): ASTM-A322

Key Features

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3/8" x 2 1/2" Alloy Steel Rectangle Bar 4142-Prehardened Part # 19200

3/8" x 2 1/2" Alloy Steel Rectangle Bar 4142-Prehardened -
Part #: 19200
Select a Cut Size
  • 18″ (18 in.) - $160.28 ea.
  • 36″ (3 ft.) - $267.67 ea.
  • 72″ (6 ft.) - $508.32 ea.
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.

QTY

Update
$160.28 for 1
$160.28 ea.
Expand Details

Dimensions

  • Thickness: 0.375"
  • Width: 2.5"
Click for more details alloy-steel-rectangle-bar-4142-prehardened-1superZoom
Material Meets These Standard(s): ASTM-A322

Key Features

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3/8" x 3" Alloy Steel Rectangle Bar 4142-Prehardened Part # 19211

3/8" x 3" Alloy Steel Rectangle Bar 4142-Prehardened -
Part #: 19211
Select a Cut Size
  • 18″ (18 in.) - $183.52 ea.
  • 36″ (3 ft.) - $306.38 ea.
  • 72″ (6 ft.) - $581.79 ea.
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.

QTY

Update
$183.52 for 1
$183.52 ea.
Expand Details

Dimensions

  • Thickness: 0.375"
  • Width: 3"
Click for more details alloy-steel-rectangle-bar-4142-prehardened-1superZoom
Material Meets These Standard(s): ASTM-A322

Key Features

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3/8" x 10" Alloy Steel Rectangle Bar 4142-Prehardened Part # 19261

3/8" x 10" Alloy Steel Rectangle Bar 4142-Prehardened -
Part #: 19261
Select a Cut Size
  • 18″ (18 in.) - $584.85 ea.
  • 36″ (3 ft.) - $976.37 ea.
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.

QTY

Update
$584.85 for 1
$584.85 ea.
Expand Details

Dimensions

  • Thickness: 0.375"
  • Width: 10"
Click for more details alloy-steel-rectangle-bar-4142-prehardened-1superZoom
Material Meets These Standard(s): ASTM-A322

Key Features

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3/8" Alloy Steel Square Bar 4142-Prehardened Part # 19357

3/8" Alloy Steel Square Bar 4142-Prehardened -
Part #: 19357
Select a Cut Size
  • 18″ (18 in.) - $77.07 ea.
  • 36″ (3 ft.) - $128.74 ea.
  • 72″ (6 ft.) - $244.54 ea.
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.

QTY

Update
$77.07 for 1
$77.07 ea.
Expand Details

Dimensions

  • Height: 0.375"
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Material Meets These Standard(s): ASTM-A322

Key Features

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1/2" x 6" Alloy Steel Rectangle Bar 4142-Prehardened Part # 19248

1/2" x 6" Alloy Steel Rectangle Bar 4142-Prehardened -
Part #: 19248
Select a Cut Size
  • 18″ (18 in.) - $353.70 ea.
  • 36″ (3 ft.) - $590.52 ea.
  • 72″ (6 ft.) - $1,121.46 ea.
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.

QTY

Update
$353.70 for 1
$353.70 ea.
Expand Details

Dimensions

  • Thickness: 0.5"
  • Width: 6"
Click for more details alloy-steel-rectangle-bar-4142-prehardened-1superZoom
Material Meets These Standard(s): ASTM-A322

Key Features

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1/2" x 5" Alloy Steel Rectangle Bar 4142-Prehardened Part # 19240

1/2" x 5" Alloy Steel Rectangle Bar 4142-Prehardened -
Part #: 19240
Select a Cut Size
  • 18″ (18 in.) - $303.88 ea.
  • 36″ (3 ft.) - $507.29 ea.
  • 72″ (6 ft.) - $963.42 ea.
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.

QTY

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$303.88 for 1
$303.88 ea.
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Dimensions

  • Thickness: 0.5"
  • Width: 5"
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Material Meets These Standard(s): ASTM-A322

Key Features

FREE MTR AVAILABLE
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