Carbon Steels 1040 is stocked by 27 North American distributors and produced by 52 large mills. Distributors will offer small quantity buys while mills will generally only sell large quantities, with delivery times anywhere from 10 to 50 weeks depending on size and form required
This material is stocked primarily in Bar Products by 16 distributors but is also available to a lesser extent in Flat Rolled Products, Tubular Products, Wire Products, Forging Products, and Fasteners.
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Specifications
The following specifications cover Carbon Steels 1040
- ASTM A29 (1040)
- ASTM A510 (1040)
- ASTM A513
- ASTM A519 (1040)
- ASTM A546 (1040)
- ASTM A576 (1040)
- ASTM A682 (1040)
- ASTM A827
- ASTM A830
- MIL S-11310 (CS 1040)
- MIL S-16788
- MIL S-46070
- SAE J1397 (1040)
- SAE J403 (1040)
- SAE J412 (1040)
- UNS G10400
Property Results
Chemistry Data : [top]
Carbon
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0.37 - 0.44 |
Iron
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Balance |
Manganese
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0.6 - 0.9 |
Phosphorus
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0.04 max |
Sulphur
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0.05 max |
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Principal Design Features
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1040 steel has a higher (0.40%) carbon content for greater strength than the lower carbon alloys. It is hardenable by heat treatment, quench and tempering to develop 150 to 250 ksi tensile strength.
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Applications
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Used for crankshafts, couplings and cold headed parts.
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Machinability
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Machinability is good, rated at 60% that of the 1112 alloy used as a 100% machining rated steel.
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Forming
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Forming of 1040 steel in the annealed condition is readily accomplished.
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Welding
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1040 steel is weldable by all of the welding methods. However with its higher carbon content it is important to use both pre-heat at 300 to 500 F and post-heat at 1100 to 1200 F practice per an approved welding procedure.
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Heat Treatment
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This steel responds well to hardening by heat treatment at 1550 to 1650 F followed by water quench and then tempering to strength level desired.
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Forging
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Forge at 2300 F down to 1800 F.
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Hot Working
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Hot work from 900 to 200 F.
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Cold Working
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In the annealed state the 1040 alloy is readily cold worked by conventional methods.
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Annealing
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Anneal at 1600 to 1800 F and slow cool in the furnace for a full anneal. A stress relief anneal may be done at 1100 F and a normalizing treatment may be done at 1650 F with slow cooling.
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Tempering
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Tempering from the quenched condition may be done at 600 to 1300 F depending upon the strength desired.
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Hardening
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Cold work will harden the alloy as will heat treatment and tempering.
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Physical Data : [top]
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Density (lb / cu. in.)
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0.284
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Specific Gravity
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7.86
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Specific Heat (Btu/lb/Deg F - [32-212 Deg F])
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0.107
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Melting Point (Deg F)
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2770
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Poissons Ratio
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0.3
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Thermal Conductivity
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360
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Mean Coeff Thermal Expansion
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6.7
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Modulus of Elasticity Tension
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30
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Modulus of Elasticity Torsion
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11
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Mechanical Data : [top]
Form |
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Round Bar |
Condition |
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Cold Drawn |
Temper |
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68 |
Tensile Strength |
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85 |
Yield Strength |
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71 |
Elongation |
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17 |
Reduction of Area |
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42 |
Rockwell |
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B93 |
Brinnell |
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170 |
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Form |
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Round Bar |
Condition |
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Hot Rolled |
Temper |
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68 |
Tensile Strength |
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90 |
Yield Strength |
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56 |
Elongation |
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24 |
Reduction of Area |
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49 |
Rockwell |
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B91 |
Brinnell |
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187 |
Videos :
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MSO currently has no videos available for this grade.
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