40Cr 41Cr4 42CrMo4 hot rolled steel round bar
steel billets:
20-50mm: use 180*220mm steel billets
52-85mm: use 180*220mm steel billets
85-120mm: use 260*300mm steel billets
130-210mm: use 650mm round billets
210-280mm: use 800mm steel billets
Comparable Standard
AISI/SAE |
DIN |
W.Nr. |
AFNOR |
JIS |
BS |
SIAU |
GB,YB |
4140 |
42CrMo4 |
1.7225 |
42CD4 |
SCM440 |
708A42 |
UM8 |
42CrMo |
5140 |
|
|
|
SCr440 |
|
|
40Cr |
5120 |
20Cr4 |
|
|
SCr435 |
|
|
20Cr |
Chemical composition
Grade |
C |
Si |
Mn |
P |
S |
Ni |
Cr |
Mo |
Cu |
Al |
AISI4140 |
0.38
0.41 |
0.15
0.35 |
0.85
1.00 |
Max
0.015 |
Max
0.040 |
Max
0.25 |
0.80
1.10 |
0.15
0.25 |
Max
0.35 |
0.012
0.030 |
40Cr |
0.37~0.44 |
0.17~0.37 |
0.50~0.80 |
≤0.035 |
≤0.035 |
≤0.030 |
0.80~1.10 |
|
|
|
20Cr |
0.18~0.24 |
0.17~0.37 |
0.50~0.80 |
≤0.035 |
≤0.035 |
≤0.30 |
0.70~1.00 |
|
≤0.30 |
|
Machinery properties
Material |
Tensile strength.
(N/mm2) |
Yield point (N/mm2) |
Elongation (%) |
Contraction (%) |
Impack work (J/cm2) |
Hardness
(HB) |
20Cr |
Min 835 |
Min 540 |
Min10 |
Min 40 |
Min 47 |
Max 179 |
40Cr |
Min 980 |
Min785 |
Min 9 |
Min 45 |
Min 47 |
Max 207 |
Producing Line:
Iron - hot metal pretreatment - Converter - Refining --VD / RH- - Continuous Casting - Hot Rolling (KOCKS) - heat --UT Check - Processing and Distribution Center
Electric Furnace - Refining --VD / RH- - Continuous Casting - Hot Rolling (KOCKS) - heat --UT Check - Processing and Distribution Center
What we can offer and guarantee:
1.Gas content requirements : O2 - <20 ppm H2 - <2 ppm N2- <100 ppm
2.Grain Size: 6 or finer
3.Macro Etch: Not more than Grade2(C2R2S2)
4.UT test: Class C/c or better
5.Processing Line:Blast Furnace/Electric Arc Furnace LRF VD Continuous Caster Hot Rolling
6.High degree of purity,homogenous structure, impacting ductility
7.High Jominy Value
Contact Person:MS.Lily Zhao
Tel:+86 18663461027
Qingdao Helio Steel Co., Ltd. Was established in March19, 2012. Our company's business staff members possess professional service capabilities of steel products, with more than a decade of experience on steel production, technology development, product sales and foreign trade. We comply the principle of friendly cooperation and mutual benefit, and persist in developing together with new and old customers.
Our company is located in Qingdao, a coastal city of Shandong Province, which is near Laiwu Steel Group. Only Laiwu City has steel production capacity of 20 million tons each year. Meanwhile, it is also the largest production base of powder metallurgy products in the whole country. Otherwise, there are more than ten well-known steel manufacturers within the province and the surrounding areas, so steel resources here is abundant and we can meet customers' various requirements.
Our company is mainly engaged in steel products for various specifications and materials, such as continuous casting billets, continuous casting tubes, hot-rolled bars, tubes, hot-rolled square steel, flat steel, H section steel, hot-rolled coils, cold-roll large-size panels, forging materials, and forgings.
We also run the import and export of steel products, based on the needs of customers at home and abroad to develop a variety of special steel products and timely delivery. I hope to sincerely cooperate with domestic and foreign customers, providing high-quality and low-priced products and professional services.
