ASTM
A29/A29M GRADE 4140 UNS 41400 HOT FORGING CARBON STEEL AND ALLOY STEEL BARS
|
UNS, USA |
G41400 |
|
ASTM |
4140 |
|
Corresponding standards |
ASTM A29/A29M-2012 |
|
Classified |
Alloy steel |
|
performance |
Strength Impact toughness Hardenability |
|
label |
Ductility tensile strength of alloy structural steels |
|
illustrate |
The characteristics and scope of application of 4140 steel: strength,
high hardenability, good toughness, small deformation during quenching, high
creep strength and lasting strength at high temperatures. It is used to
manufacture forgings with higher strength and larger quenching and tempering
section than 35CrMo steel, such as large gears for locomotive traction,
supercharger transmission gears, rear axles, connecting rods and spring clips
with great loads, and can also be used for oil deep well drill pipe joints
and salvage tools below 2000m. Can be used to manufacture bolts, screws,
studs, nuts and other fasteners. |
Chemical element content (%)
|
ingredients |
C |
Si ① |
Mn |
P |
S |
Cr |
Ni ② |
Cu ② |
Mo |
more |
|
minimum |
0.38 |
0.15 |
0.75 |
- |
- |
0.8 |
- |
- |
0.15 |
③ |
|
maximum |
0.43 |
0.35 |
1 |
0.035 |
0.04 |
1.1 |
0.25 |
0.35 |
0.25 |
(1)
The user requests a Si ≤ 0.10%. For certain cold forming parts, the Si ≤ 0.10%
should be selected.
(2) Ni, Cu is the residual content.
(3) When the steel contains Pb0.15% to 0.35%, add the letter "L"
between the second and third digits of the steel number, such as 41L40. When
lead Pb is added to the ladle, no thermal analysis is performed.
Mechanical properties
|
Thickness |
Tensile strength |
The yield point |
Elongation |
Hardness |
|
t=25 |
Quenching + tempering |
Quenching + tempering |
Quenching + tempering |
HB |
1 Approximate
cross-reference table Alloy structural steel
|
China |
Taiwan, China |
Japan |
Korea |
United States |
International Standards Organization |
Germany |
France |
European standard |
Sweden |
United Kingdom |
||||
|
GB |
ISC |
CNS |
JIS |
KS |
ASTM/AISI |
UNS |
ISO |
DIN EN/DIN |
W-Nr. |
NF EN/NF |
EN |
Digital grades |
SS14 |
BS EN/BS |
|
42CrMo |
A30422 |
SCM440 |
SCM440 |
SCM440 |
4140 |
G41400 |
42CrMo4 |
42CrMo4 |
1.7225 |
42CD4 |
42CrMo4 |
1.7225 |
2244 |
708M40 |
2 Approximate
comparison table Cold
heading steel
|
China |
United States |
International Standards Organization |
Germany |
France |
|||
|
GB |
ISC |
ASTM/AISI |
UNS |
ISO |
DIN EN/DIN |
W-Nr. |
NF EN/NF |
|
ML42CrMo |
A30424 |
4140 |
G41400 |
42CrMo4E |
42CrMo4 |
1.7225 |
42CD4 |
3 Approximate
comparison table Alloy
steel for quenching and tempering
|
United States |
International Standards Organization |
Germany |
France |
European standard |
|
|
ASTM |
ISO |
DIN EN/DIN |
NF EN/NF |
EN |
Digital grades |
|
4140 |
42CrMoS4 |
42CrMoS4 |
42CD4u |
42CrMoS4 |
1.7227 |
4 Approximate
cross-reference table Alloy structural steel
|
China |
Japan |
United States |
International Standards Organization |
Germany |
France |
European standard |
Russia |
Sweden |
United Kingdom |
|
|
GB |
JIS |
ASTM |
ISO |
DIN EN/DIN |
NF EN/NF |
EN |
Digital grades |
GOST |
SS |
BS EN/BS |
|
42CrMo |
SCM440H |
4140 |
42CrMo4 |
42CrMo4 |
42CD4 |
42CrMo4 |
1.7225 |
35KHM |
2244 |
708M40 |
Equivalent
Materials
• UNS G41400
LADHANI METAL CORPORATION, MUMBAI, INDIA
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