月份：2019年3月

Yeguang steel Metal is a distributor of 4140 grade cold drawn steel bar. 4140 bars have high hardenability, and the molybdenum content provides high strength and uniformity of hardness. Unlike other grades, the carbon content of 4140 grade steel allows it to hold up well to heat treatment, while having good wear resistance and strength.

4140 Mechanical Properties (Annealed)

Tensile Strength	95,000 psi
Yield Strength	60,500 psi
Elongation in 2″	25.7%
Reduction of Area	55.9%
Brinelle Hardness	197

4140 Mechanical Properties (Normalized)

Tensile Strength	148,000 psi
Yield Strength	95,000 psi
Elongation in 2″	17.7%
Reduction of Area	46.8%
Brinelle Hardness	302

Chemcial Compositions(%):
Quality Standard	Steel Grade	C	Si	Mn	P	S	Cr	Ni	Mo
ASTM A29	4140	0.38-0.43	0.15-0.35	0.75-1.00	≤0.035	≤0.040	0.80-1.10	/	0.15-0.25
JIS G4053	SCM440	0.38-0.43	0.15-0.35	0.60-0.90	≤0.030	≤0.030	0.90-1.20	≤0.25	0.15-0.30
EN 10083-3	42CrMo4	0.38-0.45	≤0.40	0.60-0.90	≤0.025	≤0.035	0.90-1.20	0.15-0.30	/

• ASTM A29 Standard Specification Steel Bars Carbon and Alloy Hot Wrought General Requirements 
• JIS G4053 2008 Low alloyed steels for machine structural use
• Steel for quenching and tempering-Part3: Technical delivery conditions for alloy steels of EN 10083-3:2007

Steel Grades

• ASTM A29: 4140
• JIS G4053: SCM440
• EN10083:  42CrMo4

Surface Condition:

• Smooth Surface
• Grinded Surface 
• Peeled Surface

Application:
High voltage bolts and nuts, crankshafts, camshafts, transmission axles, torsion bars, drive shafts, pump shafts, worm shafts, conveyor rollers, stems, pins, tie rods, clutch discs. Large-mass dies for hot stamping.1.6582 Steel is widely used in the aerospace industry for structural parts of flaps assembly, fuselage and landing gear, propeller plane axles.

Product Description:
1.6582 Steel is a heat treatable, low alloy steel containing nickel, chromium and molybdenum. It is known for its toughness and capability of developing high strength in the heat treated condition while retaining good fatigue strength. A very popular, versatile steel. It can be heat-treated to produce a wide range of tensile strength in moderate sections.

>>>Steel Grades

 DIN1.6582,

SNCM439,

35NCD6,

38Ch2N2MA,

EN24,

817M40,

34CrNiMo6,

Standard: En10083

Heat Treatment:

Annealing: Heat to 800℃ – 850 ℃ , hold until temperature is uniform throughout the section and cool in furnace.

Flame or Induction Hardening: 1.6582steel can be further surface hardened by either the flame or induction hardening methods resulting in a case hardness in excess of Rc 50. Parts should be heated as quickly as possible to the austenitic temperature range (830℃  – 860℃ ) and required case depth followed by an immediate oil or water quench, depending upon hardness required, workpiece size/shape and quenching arrangements. Following quenching to hand warm, most components should be tempered between 150℃  – 200℃ to remove quenching stresses in the case. This will have little effect on case hardness.

Hardening: Heat to 830℃  – 860℃, hold until temperature is uniform throughout the section, soak for 10 – 15 minutes per 25 mm section, and quench in oil, water, or polymer as required.

*Temper immediately while still hand warm.

Nitriding: 1.6582 steel can also be successfully nitrided, giving a surface hardness of up to Rc 60. Nitriding is carried out at 490℃– 530℃, followed by slow cooling (no quench) reducing the problem of distortion. Parts can therefore be machined to near final size, leaving a grinding allowance only. The tensile strength of the core is usually not affected since the nitriding temperature range is generally below the original tempering temperature employed. N.B. Nickel is inert to the action of nitrogen and in general resists its diffusion into steel. This can result in lower case hardness or longer nitriding cycle times for steels containing nickel such as 1.6582 steel.

Stress Relieving: Heat to 600℃– 650 ℃, hold until temperature is uniform throughout the section, soak for 1 hour per 25 mm of section, and cool in still air.

Tempering: Re-heat to 450℃– 660℃as required, hold until temperature is uniform throughout the section, soak for 1 hour per 25 mm of section, and cool in still air. N.B. Tempering should be avoided if possible within the range 250℃ – 450℃ due to temper brittleness.

Notes on Heat Treatment: Heating temperatures, rate of heating, cooling and soaking times will vary due to factors such as work piece size/shape also furnace type employed, quenching medium and work piece transfer facilities etc.

Chemcial composition:

Grade	C	Mn	P	S	Si	Cr	Ni	Mo
1.6582	0.30-0.38	0.50-0.80	0.025max	0.035max	0.40max	1.30-1.70	1.30-1.70	0.15-0.30

Packing details	In seaworthy packing, as your requirement.
Delivery details	within 10-50 days

Mill′s test certificate:

EN 10204/3.1 with all relevant data reg. chem. composition, mech. properties and results of testing.