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KS D4101 - Standard for Engineering Structural Cast Steel
This is a Korea standard for the chemical analysis and mechanical
properties of engineering structural steel. This material has higher
strength, mechanical properties, shock resistance and corrosion
resistance. Engineering structural steel is mainly used to
manufacture a wide range of engineering structures, such as the
bridge, hull, steel rail, high-pressure vessel and construction
steel structure, and so on.
The following is the main content of KS D4101 (1995) standard for
your reference.
The steel
number and chemical analysis of engineering structural steel (mass
fraction) (%)
| steel number |
C |
Si |
Mn |
P≤ |
S≤ |
Cr |
Ni |
Mo |
| SCC3 |
0.30-0.40 |
0.30-0.60 |
0.50-0.80 |
0.040 |
0.040 |
- |
- |
- |
| SCC5 |
0.40-0.50 |
0.30-0.60 |
0.50-0.80 |
0.040 |
0.040 |
- |
- |
- |
| SCMn1 |
0.20-0.30 |
0.30-0.60 |
1.00-1.60 |
0.040 |
0.040 |
- |
- |
- |
| SCMn2 |
0.25-0.35 |
0.30-0.60 |
1.00-1.60 |
0.040 |
0.040 |
- |
- |
- |
| SCMn3 |
0.30-0.40 |
0.30-0.60 |
1.00-1.60 |
0.040 |
0.040 |
- |
- |
- |
| SCMn5 |
0.40-0.50 |
0.30-0.60 |
1.00-1.60 |
0.040 |
0.040 |
- |
- |
- |
| SCSiMn2 |
0.25-0.35 |
0.50-0.80 |
0.90-1.20 |
0.040 |
0.040 |
|
|
|
| SCMnCr2 |
0.25-0.35 |
0.30-0.60 |
1.20-1.60 |
0.040 |
0.040 |
0.40-0.80 |
- |
- |
| SCMnCr3 |
0.30-0.40 |
0.30-0.60 |
1.20-1.60 |
0.040 |
0.040 |
0.40-0.80 |
- |
- |
| SCMnCr4 |
0.35-0.45 |
0.30-0.60 |
1.20-1.60 |
0.040 |
0.040 |
0.40-0.80 |
- |
- |
| SCMnM3 |
0.30-0.40 |
0.30-0.60 |
1.20-1.60 |
0.040 |
0.040 |
≤0.20 |
- |
0.15-0.35 |
| SCCrM1 |
0.20-0.30 |
0.30-0.60 |
0.50-0.80 |
0.040 |
0.040 |
0.80-1.20 |
- |
0.15-0.35 |
| SCCrM3 |
0.30-0.40 |
0.30-0.60 |
0.50-0.80 |
0.040 |
0.040 |
0.80-1.20 |
- |
0.15-0.35 |
| SCMnCrM2 |
0.25-0.35 |
0.30-0.60 |
1.20-1.60 |
0.040 |
0.040 |
0.30-0.70 |
- |
0.15-0.35 |
| SCMnCrM3 |
0.30-0.40 |
0.30-0.60 |
1.20-1.60 |
0.040 |
0.040 |
0.30-0.70 |
- |
0.15-0.35 |
| SCNCrM2 |
0.25-0.35 |
0.30-0.60 |
0.90-1.50 |
0.040 |
0.040 |
0.30-0.70 |
1.60-2.00 |
0.15-0.35 |
The mechanical
properties of engineering structural steel
| steel number |
Mechanical properties (no less than) |
hardness
HBS |
| σb /MPa |
σs/ Mpa |
δ(%) |
ψ (%) |
| SCC3A |
520 |
265 |
13 |
20 |
143 |
| SCC3B |
620 |
370 |
13 |
20 |
183 |
| SCC5A |
620 |
295 |
9 |
15 |
163 |
| SCC5B |
690 |
440 |
9 |
15 |
201 |
| SCMn1A |
540 |
275 |
17 |
35 |
143 |
| SCMn1B |
590 |
390 |
17 |
35 |
170 |
| SCMn2A |
590 |
345 |
16 |
35 |
163 |
| SCMn2B |
640 |
440 |
16 |
35 |
183 |
| SCMn3A |
640 |
370 |
13 |
30 |
170 |
| SCMn3B |
690 |
490 |
13 |
30 |
197 |
| SCMn5A |
690 |
390 |
9 |
20 |
183 |
| SCMn5B |
740 |
540 |
9 |
20 |
212 |
| SCSiMn2A |
590 |
295 |
13 |
35 |
163 |
| SCSiMn2B |
640 |
440 |
17 |
35 |
183 |
| SCMnCr2A |
590 |
370 |
13 |
30 |
170 |
| SCMnCr2B |
640 |
440 |
17 |
35 |
180 |
| SCMnCr3A |
640 |
390 |
9 |
25 |
183 |
| SCMnCr3B |
690 |
490 |
13 |
30 |
207 |
| SCMnCr4A |
690 |
410 |
9 |
20 |
201 |
| SCMnCr4B |
740 |
540 |
13 |
25 |
223 |
| SCMnM3A |
690 |
390 |
13 |
30 |
183 |
| SCMnM3B |
740 |
490 |
13 |
30 |
212 |
| SCCrM1A |
590 |
390 |
13 |
30 |
170 |
| SCCrM1B |
690 |
490 |
13 |
30 |
201 |
| SCCrM3A |
690 |
440 |
9 |
25 |
201 |
| SCCrM3B |
740 |
540 |
9 |
25 |
217 |
| SCMnCrM2A |
690 |
440 |
13 |
30 |
201 |
| SCMnCrM2B |
740 |
540 |
13 |
30 |
212 |
| SCMnCrM3A |
740 |
540 |
9 |
25 |
212 |
| SCMnCrM3B |
830 |
635 |
9 |
25 |
223 |
| SCNCrM2A |
780 |
590 |
9 |
30 |
223 |
| SCMnCrM3B |
880 |
685 |
9 |
20 |
269 |
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