SAE4140 Steel Round Bar, SAE4140 Steel Round Bar Manufacturers,
SAE4140 Steel Suppliers, SAE4140 Stockist, SAE4140 Steel Dealers,
SAE4140 Steel Distributors, SAE4140 Wholesalers, SAE4140 Steel
Traders, SAE4140 Steel Square Distributors, SAE4140 Steel Flat Bar,
SAE4140 Steel Companies Near me.
Grade Introduction:
SAE 4140 Alloy steel grade is a versatile alloy with good atmospheric
corrosion resistance and reasonable strength. It shows good overall
combinations of strength, toughness, wears resistance, and fatigue
strength.
Grade Application:
SAE 4140 alloy steel grade finds many applications as forgings for the
aerospace and oil and gas industries, along with myriad uses in the
automotive, agricultural, and defense industries, Typical uses are
forged gears and shafts, spindles, fixtures, jigs, and collars.
Equivalent grades:
USA |
Din |
BS |
BS |
Japan |
ASTM A29 |
DIN 1654 |
EN 10084 |
BS 970 |
JIS G4103 |
4140 |
1.6523/21NiCrMo2 |
1.6523/21NiCrMo2-2 |
805M20 |
SNCM220 |
Addition to other grades:
MS, EN1A, EN3B, EN8, EN8D, EN9, EN19, EN24, EN31, EN32B, EN36C, EN41B,
EN43B, EN47, EN353, IS2062, 42Crmo4, HCHCR, OHNS, D2, D3, H-11, H-13,
CW-1, M2, M35, M42, 2714, SKD-11, P20, P20+S, P20+Ni, SCM 420, ASTM
SA-36, ASTM SA-105, SAE 1018, SAE 1020, SAE 8620, 16MNCR5, 20MNCR5,
C20, C35, C40, C45, C50, C60, CK45, 20C8, 40C8, 45C8, 55C8, C55MN75,
SAE 52100, S40C, S355J2G3.
Our Supply Range:
Price List:
People also search as:
SAE4140, SAE4140 Steel, SAE4140 Chemical composition, SAE4140
Mechanical properties, SAE4140 Equivalent Grades, SAE4140 Steel plate,
SAE4140 Steel sheet, SAE4140 Manufacturers, SAE4140 Suppliers, SAE4140
Dealers, SAE4140 Stockist, SAE4140 Distributors, SAE4140 Wholesalers,
SAE4140 Traders.
Chemical composition:
The following table shows the chemical composition of SAE4140 steel:
Standard |
Grade |
C |
Mn |
P |
S |
Si |
Cr |
Mo |
ASTM A29 |
4140 |
0.38-0.43 |
0.75-1.00 |
0.035 |
0.040 |
0.15-0.35 |
0.8-1.10 |
0.15-0.25 |
EN 10250 |
42CrMo4 /1.7224 |
0.38-0.45 |
0.6-0.9 |
0.035 |
0.035 |
0.4 |
0.9-1.2 |
0.15-0.30 |
JIS G4105 |
SCM440 |
0.38-0.43 |
0.60-0.85 |
0.03 |
0.03 |
0.15-0.35 |
0.9-1.2 |
0.15-0.30 |
Mechanical Properties:
Properties |
Metric |
Imperial |
Tensile strength |
655 MPa |
95000 psi |
Yield strength |
415 MPa |
60200 psi |
Bulk modulus (typical for steel) |
140 GPa |
20300 ksi |
Shear modulus (typical for steel) |
80 GPa |
11600 ksi |
Elastic modulus |
190-210 GPa |
27557-30458 ksi |
Poisson’s ratio |
0.27-0.30 |
0.27-0.30 |
Elongation at break (in 50 mm) |
25.70% |
25.70% |
Hardness, Brinell |
197 |
197 |
Hardness, Knoop (converted from Brinell hardness) |
219 |
219 |
Hardness, Rockwell B (converted from Brinell hardness) |
92 |
92 |
Hardness, Rockwell C (converted from Brinell hardness. Value below
normal HRC range, for comparison purposes only)
|
13 |
13 |
Hardness, Vickers (converted from Brinell hardness) |
207 |
207 |
Machinability (based on AISI 1212 as 100 machinability) |
65 |
65 |
Hardness:
197
Heat Treatment:
Heat treatment is carried out after hot working to render the steel
suitable for machining and to meet the mechanical property ranges
specified for the steel’s particular applications.
Hardening:
SAE 4140 alloy steel bar, plate, and square can be hardened by cold
working, or heating and quenching.
SAE 4140 alloy steel is usually supplied with ready heat treated to
hardness in 18-22 HRC. If further heat treatment is required, then
heat to 840 ℃ – 875 ℃, 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.
Tempering:
Re-heat SAE4140 grade steel to 550℃ – 700 ℃ as required, hold until
temperature is uniform throughout the section, soak for 1 hour per 25
mm of the section, and cool in still air.
Physical Properties
The physical properties of SAE 4140 alloy steel are highlighted in the
following table.
Properties |
Metric |
Imperial |
Density |
7.85 g/cm3 |
0.284 lb/in³ |
Melting point |
1416°C |
2580°F |
Thermal Properties
Properties |
Metric |
Imperial |
Density |
7.85 g/cm3 |
0.284 lb/in³ |
Melting point |
1416°C |
2580°F |
Forging Properties:
Forging of SAE 4140 steel should be carried out between 2200 and 1650
º F (1200 and 900 º C). The lower the finishing temperature from
forging, the finer will be the grain size. This alloy steel should
ideally not be forged below 1650 º F (900 º C) and should be slow
cooled after forging in oil or water.
Stress Relieving:
Stress Relieving Heat to 680°C– 700°C, hold until temperature is
uniform throughout the section, soak for 1 hour per 25 mm section, and
cool in still air.
Normalizing:
This process is defined as heating a steel to a temperature above the
ferrite to austenite transformation range and then cooling in air to a
temperature well below this transformation range. This treatment may
be carried out on forged products as a conditioning treatment prior to
final heat treatment. Normalizing also serves to refine the structure
of forgings that might have cooled non-uniformly from their forging
operation. The nominal normalizing temperature for 4140 grade is 1600
º F (870 º C), but production experience may necessitate a temperature
either 50 º F (10 º C) above or below this figure. In fact, when
forgings are normalized before, say, carburizing or hardening and
tempering, the upper range of normalizing temperatures is used. When
normalizing is the final heat treatment, the lower temperature range
is used.
Annealing:
SAE 4140 alloy steel is annealed at 872°C (1600°F) followed by slowly
cooling in the furnace.
Density:
Properties |
Metric |
Imperial |
Density |
7.85 g/cm3 |
0.284 lb/in³ |
Machinability:
SAE 4140 alloy steel has good machinability in the annealed condition.
Welding:
SAE 4140 alloy steel can be welded using all conventional techniques.
However, the mechanical properties of this steel will be affected if
it is welded in the heat-treated condition, and post-weld heat
treatment should be performed.
Supply Cities:
Ahmedabad, Amaravathi, Ambattur, Bangalore, Belgaum, Chennai,
Chittoor, Coimbatore, Dindigul, Mysore, Nellore, Hyderabad, Kochi,
Mangalore, Tirupur, Tuticorin, Madurai, Andhra Pradesh, Karnataka,
Puducherry, Kerala, Tamil Nadu, Telangana, Salem, Thanjavur, Trichy,
Erode, Vellore, Ranipet, Sivakasi, Karur, Hosur, Nagercoil,
Kanchipuram, Karaikudi, Neyveli, Cuddalore, Kumbakonam,
Thiruvannamalai, Pollachi, Rajapalayam, Gudiyatham, Pudukottai,
Vaniyambadi, Ambur, Nagapattinam, Trivandrum, Vijayawada, Guntur,
Thirupathi, Nazarathpet, Kakinada, Kurnool, Kadapa, Nizamabad,
Mahabubnagar, Karimnagar.