Manufacturing standards
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- 1. Ordinary Steel JIS G3101
- We make the most inventory and sales on SS400. We can also provide SGD3M, SEA1018, and AISI1010 upon request.
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- 2. Carbon rod for machine structural use JIS G4051
- We make the most inventory and sales on S45C, and partly on S35C and others. We can also provide other types from S15C to S58C upon request.
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- 3. Free-cutting Steal JIS G4804
- We manufacture and sell our own products that have standard equivalent to SUM24L, 12L14. In addition, we can offer other products including S45CL, SCM415L, SCM435cupon request.
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- 4. Alloy steel for machine structural use JIS G4053
- We focus most on manufacturing SCM415, SCM435. We also produce, upon request, a couple of foreign standard products such as SAE and AISI, besides SNC and SCR
Rolled steel for general structure
| Symbol | C | Mn | P | S |
|---|---|---|---|---|
| SS330 | \ | \ | ≤0.050 | ≤0.050 |
| SS400 | ||||
| SS490 | ||||
| SS540 | ≤0.30 | ≤1.60 | ≤0.040 | ≤0.040 |
| Symbol | Tensile Test | ||||||
|---|---|---|---|---|---|---|---|
| Yield point@N/mm² | Tensile strength N/mm² |
Elongation | |||||
| Diameter, side, distance between opposite sides, thickness mm | Diameter, side, distance between opposite sides, thickness mm | Test pc | | ||||
| ≤16 | 16<…≤40 | 40> | |||||
| SS330 | 205≥ | 195≥ | 175≥ | 330`430 | ≤25 | No.2 | 25≥ |
| 25> | No.3 | 30≥ | |||||
| SS400 | 245≥ | 235≥ | 215≥ | 400`510 | ≤25 | No.2 | 20≥ |
| 25> | No.3 | 24≥ | |||||
| SS490 | 285≥ | 275≥ | 255≥ | 490`610 | ≤25 | No.2 | 18≥ |
| 25> | No.3 | 21≥ | |||||
| SS540 | 400≥ | 390≥ | \ | 540≥ | ≤25 | No.2 | 13≥ |
| 25> | No.3 | 17≥ | |||||
Carbon steel for machine structural use
| Symbol | Chemical compositionij | ||||
|---|---|---|---|---|---|
| C | Si | Mn | P | S | |
| S10C S12C S15C |
0.08`0.13 0.10`0.15 0.13`0.18 |
0.15`0.35 0.15`0.35 0.15`0.35 |
0.30`0.60 0.30`0.60 0.30`0.60 |
≤0.030 ≤0.030 ≤0.030 |
≤0.035 ≤0.035 ≤0.035 |
| S17C S20C S22C |
0.15`0.20 0.18`0.23 0.20`0.25 |
0.15`0.35 0.15`0.35 0.15`0.35 |
0.30`0.60 0.30`0.60 0.30`0.60 |
≤0.030 ≤0.030 ≤0.030 |
≤0.035 ≤0.035 ≤0.035 |
| S25C S28C S30C |
0.22`0.28 0.25`0.31 0.27`0.33 |
0.15`0.35 0.15`0.35 0.15`0.35 |
0.30`0.60 0.60`0.90 0.60`0.90 |
≤0.030 ≤0.030 ≤0.030 |
≤0.035 ≤0.035 ≤0.035 |
| S33C S35C S38C |
0.30`0.36 0.32`0.38 0.35`0.41 |
0.15`0.35 0.15`0.35 0.15`0.35 |
0.60`0.90 0.60`0.90 0.60`0.90 |
≤0.030 ≤0.030 ≤0.030 |
≤0.035 ≤0.035 ≤0.035 |
| S40C S43C S45C |
0.37`0.43 0.40`0.46 0.42`0.48 |
0.15`0.35 0.15`0.35 0.15`0.35 |
0.60`0.90 0.60`0.90 0.60`0.90 |
≤0.030 ≤0.030 ≤0.030 |
≤0.035 ≤0.035 ≤0.035 |
| S48C S50C S53C |
0.45`0.51 0.47`0.53 0.50`0.56 |
0.15`0.35 0.15`0.35 0.15`0.35 |
0.60`0.90 0.60`0.90 0.60`0.90 |
≤0.030 ≤0.030 ≤0.030 |
≤0.035 ≤0.035 ≤0.035 |
| S55C S58C S9CK |
0.52`0.58 0.55`0.61 0.07`0.12 |
0.15`0.35 0.15`0.35 0.15`0.35 |
0.60`0.90 0.60`0.90 0.30`0.60 |
≤0.030 ≤0.030 ≤0.025 |
≤0.035 ≤0.035 ≤0.025 |
| S15CK S20CK |
0.13`0.18 0.18`0.23 |
0.15`0.35 0.15`0.35 |
0.30`0.60 0.30`0.60 |
≤0.025 ≤0.025 |
≤0.025 ≤0.025 |
Sulfur and sulfur composite free cutting steel
| Symbol | Chemical compositionij | ||||
|---|---|---|---|---|---|
| C | Si | Mn | P | Pb | |
| SUM11 | 0.08`0.13 | 0.30`0.60 | ≤0.040 | 0.08`0.13 | \ |
| SUM12 | 0.08`0.13 | 0.60`0.90 | ≤0.040 | 0.08`0.13 | \ |
| SUM21 | ≤0.13 | 0.70`1.00 | 0.07`0.12 | 0.16`0.23 | \ |
| SUM22 | ≤0.13 | 0.70`1.00 | 0.07`0.12 | 0.24`0.33 | \ |
| SUM22L | ≤0.13 | 0.70`1.00 | 0.07`0.12 | 0.24`0.33 | 0.10`0.35 |
| SUM23 | ≤0.09 | 0.75`1.05 | 0.04`0.09 | 0.26`0.35 | \ |
| SUM23L | ≤0.09 | 0.75`1.05 | 0.04`0.09 | 0.26`0.35 | 0.10`0.35 |
| SUM24L | ≤0.15 | 0.85`1.15 | 0.04`0.09 | 0.26`0.35 | 0.10`0.35 |
| SUM31 | 0.14`0.20 | 1.00`1.30 | ≤0.040 | 0.08`0.13 | \ |
| SUM31L | 0.14`0.20 | 1.00`1.30 | ≤0.040 | 0.08`0.13 | 0.10`0.35 |
| SUM32 | 0.12`0.20 | 0.60`1.10 | ≤0.040 | 0.10`0.20 | \ |
| SUM41 | 0.32`0.39 | 1.35`1.65 | ≤0.040 | 0.08`0.13 | \ |
| SUM42 | 0.37`0.45 | 1.35`1.65 | ≤0.040 | 0.08`0.13 | \ |
| SUM43 | 0.40`0.48 | 1.35`1.65 | ≤0.040 | 0.24`0.33 | \ |
