So-Lucky Steel is a thirdparty supply chain of steel, stainless steel, aluminum to the automotive, appliance & industrial products industries.As a steel sales, storage, machining, and transport integration company, we know OEM material standards well, providing materials to global customers. We also provide tryout materials for automotive metal stamping tools.
Mild steel
Despite the name, mild steel can be quite strong and tough, despite having a low amount of carbon. Mild steel is a type of carbon steel with a low amount of carbon. It has a variety of applications in different industries and is commonly used in the construction industry to build prominent structures.
Chemical composition and Mechanical properties
The Material |
Chemical composition |
C% |
Mn% |
Si% |
P% |
S% |
Al% |
Ti% |
Nb% |
B53 3271 Ci |
0.02-0.12 |
0.10-0.60 |
≤ 0.50 |
≤ 0.10 |
≤ 0.045 |
- |
≤ 0.30 |
- |
B53 3271 Ei |
≤ 0.12 |
0.08-0.70 |
≤ 0.50 |
≤ 0.10 |
≤ 0.045 |
≥0.015 |
≤ 0.30 |
- |
B53 3271 ESi |
≤ 0.12 |
0.05-0.60 |
≤ 0.50 |
≤ 0.10 |
≤ 0.045 |
≥0.015 |
≤ 0.30 |
- |
B53 3271 SESi |
≤ 0.12 |
≤ 0.60 |
≤ 0.50 |
≤ 0.10 |
≤ 0.045 |
≥0.015 |
≤ 0.30 |
- |
B53 3271 1Ci |
≤ 0.12 |
≤ 0.60 |
- |
≤ 0.045 |
≤ 0.045 |
- |
- |
- |
B53 3271 3Ci |
≤ 0.08 |
≤ 0.40 |
- |
≤ 0.03 |
≤ 0.03 |
- |
- |
- |
The Material |
Mechanical property |
YS |
TS(MPa) |
EL(%) |
r |
n |
B53 3271 Ci |
120-300 |
260-420 |
≥26 |
- |
- |
B53 3271 Ei |
120-240 |
260-360 |
≥34 |
≥1.30 |
≥0.16 |
B53 3271 ESi |
140-200 |
270-340 |
≥36 |
≥1.60 |
≥0.18 |
B53 3271 SESi |
140-180 |
270-330 |
≥40 |
≥1.90 |
≥0.21 |
B53 3271 1Ci |
170-360 |
≤440 |
≥24 |
- |
- |
B53 3271 3Ci |
170-330 |
≤400 |
≥29 |
- |
- |
What makes us different
When it comes to finding a dependable partner in steel sales, warehousing, machining, and transportation services, Hengqiao (Shanghai) International Trade Co., Ltd. is the perfect solution! Our capabilities encompass OEM material standards along with global material distribution. Furthermore, we specialize in trial die materials of automotive metal stamping tools. We guarantee stability through our long-term reliable inventory with multiple types and specifications available; 100% quality assurance with support from third-party inspection; fast response and delivery times; and advanced processing equipment plus self owned logistics to ensure your projects are completed swiftly and effectively. Rely on us today for optimal steel solutions!
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