45# Carbon Steel Seamless Round Pipe For Connecting rod, bolt, gear
and shaft under alternating load
45# seamless steel tube after tempering parts have good
comprehensive mechanical properties, widely used in a variety of
important structural parts, especially those working under
alternating load connecting rod, bolt, gear and shaft, etc.. But the surface hardness is low, not wear-resistant. The surface hardness of parts can be improved by quenching and
tempering.
45# is GB,JIS called :S45C,ASTM called 1045,080M46,DIN called :C45.
Its chemical composition of carbon (C) content is 0.42~0.50%, Si
content is 0.17~0.37%, Mn content is 0.50~0.80%, Cr content
<=0.25%
Recommended heat treatment temperatures: normalizing 850, quenching
840, tempering 600.
No. 45 steel is high quality carbon structure steel, hardness is
not high, easy cutting, mold is often used as template, pin, guide
column, but must be heat treatment.
1. No. 45 steel is qualified for hardness greater than HRC55 (up to
HRC62) before tempering after quenching.
The maximum practical hardness is HRC55 (high-frequency hardening
HRC58).
2. No. 45 steel should not adopt the heat treatment process of
carburizing and quenching.
After quenching and tempering, the parts have good comprehensive
mechanical properties and are widely used in various important
structural parts, especially those connecting rods, bolts, gears
and shafts that work under alternating loads. But the surface hardness is low, not wear-resistant. The surface hardness of parts can be improved by quenching and
tempering.
Carburizing treatment is generally used for surface wear-resistant,
impact-resistant core heavy-duty parts, and its wear resistance is
higher than quenching and tempering + surface quenching. Its surface carbon content is 0.8-1.2%, the core is generally
0.1-0.25% (under special circumstances, 0.35%). After heat treatment, the surface can obtain high hardness
(HRC58--62), the core hardness is low, impact resistance.
If 45 steel is carburized, hard and brittle martensite will appear
in the core after quenching, and the advantage of carburizing
treatment will be lost. The use of carburizing process of materials, carbon content is not
high, to 0.30% core strength can be very high, rarely seen on the
application. Never seen examples, only introduced in textbooks. The process of quenching and tempering + high frequency surface
hardening can be adopted, and the wear resistance is slightly worse
than carburizing.
According to the GB/T699-1999 standard, the recommended heat
treatment system of 45 steel is 850℃ normalizing, 840℃ quenching
and 600℃ tempering. The yield strength of 45 steel is greater than
or equal to 355MPa.
GB/T699-1999 standard 45 steel tensile strength is 600MPa, yield
strength is 355MPa, elongation is 16%, area reduction is 40%,
impact energy is 39J.
| Product Name | 45# Carbon Steel Seamless Round Pipe |
| Material | Carbon Steel |
| Grade | 45# |
| Tolerance | ±1% |
| Delivery Condition | Sea Transportation |
| Application | Connecting rod, bolt, gear and shaft under alternating load |
| Advantage | High Cost Performance and Stock Available |
| Elongation | 10% |
| Feature | |
| Standard | JIS, AiSi, ASTM, GB, DIN, EN |
| Tensile strength | ≥600Mpa |
| Yeild Strength | ≥355Mpa |
|
percentage
of
contraction | 40% |
| Impact Energy | 39J |
Product Pictures
