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Laser Cut 4130 Chromoly Steel

4130 Chromoly steel is a low carbon alloy steel (Chromium and Molybdenum) that excels in structural applications and welding, along with many other high-stress, high-performance projects.

  • Available thicknesses range from .050″ – .250″
  • Laser cut sheet metal (+/- .005″ cutting tolerance)
  • 2-4 day lead time before shipping
  • USA sourced

Starting from $29

High Hardness
CORROSION RESISTANT
STRONG

What is 4130 Chromoly?

4130 Chromoly steel is a durable metal meant for long-lasting projects. If what you’re making needs to withstand extreme pressures and temperatures over time, Chromoly might be the metal for you. The reason for this is in one of its key properties: Creep Strength.

Available Services:

What can you make with 4130 Chromoly?

When you use this material in high-stress applications, you can be sure that it will stay in place and hold its shape for longer. Hence why it’s often used in bicycle frames, roll cages, and airplane structures all over the world.

If you’re looking at something a little smaller, like a gear or cog. 4130 Chromoly steel’s excellent heat treatability and machinability make it an ideal fit for strong, tiny parts.

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Material Details

.050″ 4130 Chromoly

Details
Advertised Thickness .050″ | 1.27mm
Gauge N/A
Thickness Tolerance Positive .003
Thickness Tolerance Negative .003
Cutting Process Fiber Laser
Cut Tolerance .005
Top/Bottom Finish Identical both sides
Sourced from USA
Available Operations
Deburring No
Bending Yes
Countersinking No
Tapping No
Anodizing No
Plating Yes
Powder Coating Yes
Hardware No
Tumbling No
Design Considerations
Min Part Size .25″ x .375″
Max Part Size 44″ x 30″
Min Hole Size .020″
Min Bridge Size .025″
Min Hole to Edge Size .020″
Tab and Slot Tolerance .010″
Min Bend Part Size .375″ x 1.5″
Max Bending Flat Part Size 44″ x 30″
Max Bend Length 44″
Min Flange Length (Before Bend/Flat Pattern) 90° or less (obtuse) .255″
Min Flange Length (After Bend) 90° or less (obtuse) .302″
Die Width .472″
Effective Bend Radius @ 90° .050″
Max Bend Angle 130°
Bend Angle Tolerance (bend length up to 24″) +/- 1 degree
Bend Angle Tolerance (bend length over 24″) +/- 2 degrees
Bend Deduction @ 90° .0945″
K Factor .38
Minimum Joggle BL2BL @90 Max Flange .310″
Maximum Joggle @90 Max Flange 3.750″
Bend Relief Depth .120
Min Plating Part Size 1″ x 3″
Max Plating Part Size 23″ x 23″
Min Powder Coating Part Size 1″ x 3″
Max Powder Coating Part Size 23″ x 23″
Properties
Material Composition Chromium (Cr): 0.8 – 1.1 Manganese (Mn): 0.4 – 0.6 Carbon (C): 0.28 – 0.33 Silicon (Si): 0.15 – 0.35 Molybdenum (Mo): 0.15 – 0.25 Sulfur (S): 0 – 0.040 Phosphorus (P): 0 – 0.035
Density 490 lb/ft^3
Heat treatments process Annealed/spheroidized
ASTM A505/506
Hardness 34-38
Tensile Strength (Ultimate) 77-150 ksi
Tensile Strength (Yield) 63-140 ksi
Shear Strength 49-93 ksi
Shear Modulus 11000 ksi
Fatigue Strength 47-96 ksi
Brinell Hardness 200-300
Elongation at Break 13-26%
Elastic Modulus 27000 ksi
Poisson’s Ratio .29
Thermal Conductivity 25 BTU/h-ft-°F
Melting Point 2590 °F
Magnetic Yes
Does it Rust? It can, but Chromoly is corrosion resistant and tends to rust only at the surface level. With appropriate preparation and maintenance, Chromoly will avoid rusting indefinitely.
Not sure what some of those properties mean? Check out our Material Properties Cheat Sheet.

Our laser cut chromoly is guaranteed

We guarantee awesome quality parts. If you’re not 100% happy, we’ll give you a refund or remake on the spot – no questions, no hassle.

Services available for chromoly

Bending

We know your projects are multi-dimensional. Get freshly bent metal parts, right off the machine.

Plating

Protect your designs with plating. Zinc electroplating helps defend your parts from rust while increasing strength and resistance to wear.

Powder Coating

Custom powder coating gives your laser and waterjet cut parts a bold, long-lasting finish and protective layer which provides corrosion, oxidation, and damage resistance.

Tapping

Utilizing specialized, automated equipment, we precisely laser-cut a hole, create some threading, and send you on your way with your completed part.

Bending with Chromoly

Stress cracking is common and unavoidable when bending 4130 Chromoly, especially at thicknesses of .125″ and greater.

Start your first SendCutSend project today!

Upload your CAD design or use our parts builder and get a free instant quote on your custom laser cut parts, all delivered to your door in a matter of days.

No CAD File? No Problem! Send your sketch or template to our Design Services team.

We proudly use hardware by PEM

Flush stud, M8 x 1.25, .472" Zinc plus Clear Chromate

SKUFH-M8-12
Thread SizeM8 x 1.25
Hole size in sheet (+0.003/-.0.000).315″
Minimum sheet thickness0.94″
Maximum sheet thickness.347″
Fastener materialSteel
Minimum distance hole C/L to edge0.378″
When determining the distance between two or more fasteners, you can calculate the distance by the formula, C/L to edge + 1/2 the diameter of the second mounting hole..535″
Recommended panel materialSteel/Aluminum
Coating typeZinc
Length.472″
Aluminum material ranges (5052, 6061, 7075)0.100″-0.250″
Steel material ranges (CRS, HRPO, HR)0.104″-0.250″

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We proudly use hardware by PEM

Flush Standoff, 4-40, .250" Zinc plus Clear Chromate

SKUSO-440-8
Thread Size4-40 x .250″
Hole size in sheet (+0.003/-.0.000).168″
Minimum sheet thickness0.040″
Maximum sheet thickness.125″
Fastener materialSteel
Minimum distance hole C/L to edge0.230″
When determining the distance between two or more fasteners, you can calculate the distance by the formula, C/L to edge + 1/2 the diameter of the second mounting hole..314″
Recommended panel materialSteel/Aluminum
Coating typeZinc
Length.250″
Aluminum material ranges (5052, 6061, 7075)0.040″-0.125″
Steel material ranges (CRS, HRPO, HR)0.048″-0.119″