20年のノウハウとスマート工場システムにより、お客様が求める規格の素材を正確かつ迅速に切断・加工して納品します。大国スチールと㈱ハンミン金属の2工場体制で、10Φ~530Φまで対応します。
Tell us the material, grade, quantity and dimensions, and we will provide a fast quote and delivery schedule.
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信頼・信用そして価値。お客様が求める価値を確実かつ正確に提供し、お客様から信頼と信用をいただくために努力する大国スチール・㈱ハンミン金属です。
20年のノウハウを活かし、専門性を備えた人材と各種ネットワークを活用し、Smart Factory Systemを構築することで、信頼と信用を得られるよう最善を尽くしています。
大国スチールは、特殊鋼・ステンレス・合金素材をお客様の要求規格に切断・加工して納品する素材専門企業です。受注から素材準備、切断、精密加工、寸法確認、梱包・出荷まで全工程を管理します。
スマート工場システムで現場作業をデジタル化・監視し、遠隔制御まで可能にすることで、迅速かつ正確な納期と一貫した品質を実現します。
Precision cutting with dedicated equipment for every specification.
Chemical composition (%) of major grades. (scroll horizontally)
| 강종 / Grade | UNS No | 규격 / Spec | C | Si | Mn | P | S | Ni | Cr | Mo | Cu | Fe | Al | Ti | W | Co | OTHER |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| SM20C | – | – | 0.18~0.23 | 0.15~0.35 | 0.30~0.60 | 0.03 | 0.035 | 0.2 | – | – | 0.3 | – | – | – | – | – | – |
| SM45C | – | – | 0.42~0.48 | 0.15~0.35 | 0.60~0.90 | 0.03 | 0.035 | 0.2 | – | – | 0.3 | – | – | – | – | – | – |
| SCM440 | – | – | 0.38~0.43 | 0.15~0.35 | 0.60~0.85 | 0.03 | 0.03 | 0.25 | 0.90~1.20 | 0.15~0.30 | 0.3 | – | – | – | – | – | – |
| AISI 4140 | – | – | 0.38~0.43 | 0.15~0.35 | 0.75~1.00 | 0.035 | 0.04 | – | 0.80~1.10 | 0.15~0.25 | – | – | – | – | – | – | – |
| SNCM439 | – | – | 0.36~0.43 | 0.15~0.35 | 0.60~0.90 | 0.03 | 0.03 | 1.60~2.00 | 0.60~1.00 | 0.15~0.30 | – | – | – | – | – | – | – |
| AISI 4340 | – | – | 0.38~0.43 | 0.15~0.35 | 0.60~0.80 | 0.035 | 0.04 | 1.65~2.00 | 0.70~0.90 | 0.20~0.30 | – | – | – | – | – | – | – |
| F1554 Gr.36 | – | – | 0.28 | – | – | 0.05 | 0.06 | – | – | – | 0.2 | – | – | – | – | – | – |
| F1554 Gr.55 | – | – | 0.3 | 0.5 | 1.35 | 0.04 | 0.05 | – | – | – | 0.2 | – | – | – | – | – | – |
| F1554 Gr.105 | – | – | – | – | – | 0.048 | 0.058 | – | – | – | 0.2 | – | – | – | – | – | – |
| STS304 | – | – | 0.08 | 1 | 2 | 0.045 | 0.03 | 8.00~10.50 | 18.0~20.0 | – | – | – | – | – | – | – | – |
| B8 CL1 , CL2 | – | A193/A320 | 0.08 | 1 | 2 | 0.045 | 0.03 | 8.0~11.0 | 18.0~20.0 | – | – | – | – | – | – | – | – |
| A2 50,70 | – | – | 0.1 | 1 | 2 | 0.05 | 0.03 | 8.0~19.0 | 15.0~19.0 | – | – | – | – | – | – | – | – |
| STS316 | – | – | 0.08 | 1 | 2 | 0.045 | 0.03 | 10.0~14.0 | 16.0~18.0 | 2.00~3.00 | – | – | – | – | – | – | – |
| B8M CL1,CL2 | – | A193/A320 | 0.08 | 1 | 2 | 0.045 | 0.03 | 10.0~14.0 | 16.0~18.0 | 2.00~3.00 | – | – | – | – | – | – | – |
| A4 70,80 | – | – | 0.08 | 1 | 2 | 0.045 | 0.03 | 10.0~15.0 | 16.0~18.5 | 2.00~3.00 | – | – | – | – | – | – | – |
| Ni 200 | N02200 | B160 | 0.15 | 0.35 | 0.35 | – | 0.01 | 99 | – | – | 0.25 | 0.4 | – | – | – | – | – |
| Monel 400 | N04400 | B164 | 0.3 | 0.5 | 2 | – | 0.024 | 63 | – | – | 28.0~34.0 | 2.5 | – | – | – | – | – |
| Monel K500 | N05500 | B865 | 0.18 | 0.5 | 1.5 | – | 0.01 | 63.0~70.0 | – | – | 27.0~33.0 | 2 | 2.30~3.15 | 0.35~0.85 | – | – | – |
| Inconel 718 | N07718 | B637 | 0.08 | 0.35 | 0.35 | 0.015 | 0.015 | 50.0~55.0 | 17.0~21.0 | 2.8~3.3 | 0.3 | Remainder | 0.20~0.80 | 0.65~1.15 | – | – | 1.0 Cb+Ta 4.75~5.50 |
| C-276 | N10276 | B574 | 0.01 | 0.08 | 1 | 0.04 | 0.03 | Remainder | 14.5~16.5 | 15.0~17.0 | – | 4.0~7.0 | – | – | 3.0~4.5 | – | 2.5 B. max 0.35 |
| 904L | N08904 | – | 0.02 | 1 | 2 | 0.04 | 0.03 | 23.0~28.0 | 19.0~23.0 | 4.0~5.0 | 1.0~2.0 | Balance | – | – | – | – | N:0.10 |
| Alloy625 | N06625 | B446 | 0.1 | 0.5 | 0.5 | 0.015 | 0.015 | 58 | 20.0~23.0 | 8.0~10.0 | – | 5 | 0.4 | 0.4 | – | 1 | Cb+Ta 3.15~4.15 |
| 660 | S66286 | A453 | 0.08 | 0.40~1.00 | 0.40~1.00 | 0.04 | 0.03 | 24.0–28.0 | 12.0–15.0 | 2.0–3.5 | 0.5 | – | 0.35 | 1.80–2.10 | – | – | – |
| Incoloy 825 | N08825 | B425 | 0.05 | 0.5 | 1 | – | 0.03 | 38.0~46.0 | 19.5~23.5 | 2.5~3.5 | 1.5~3.0 | min 22.0 | 0.2 | 0.60~1.20 | – | – | – |
| Incoloy 925 | N08925 | – | 0.03 | 0.5 | 1 | – | 0.03 | 42.0~46.0 | 19.5~22.5 | 2.5~3.5 | 1.5~3.0 | min 22.0 | 0.10~0.50 | 1.9~2.4 | – | – | Cb. max 0.50 |
| F51 | S31803 | A182/A276/A479 | 0.03 | 1 | 2 | 0.03 | 0.02 | 4.5~6.5 | 21.0~23.0 | 2.5~3.5 | – | – | – | – | – | – | N:0.08~0.20 |
| F60 | S32205 | A182/A276/A479 | 0.03 | 1 | 2 | 0.03 | 0.02 | 4.5~6.5 | 22.0~23.0 | 3.0~3.5 | – | – | – | – | – | – | N:0.14~0.20 |
| F53 | S32750 | A182/A479 | 0.03 | 0.8 | 1.2 | 0.035 | 0.02 | 6.0~8.0 | 24.0~26.0 | 3.0~5.0 | 0.5 | – | – | – | – | – | N:0.24~0.32 |
| F55 | S32760 | A182/A276/A479 | 0.03 | 1 | 1 | 0.03 | 0.01 | 6.0~8.0 | 24.0~26.0 | 3.0~4.0 | 0.50~1.00 | – | – | – | 0.50~1.00 | – | N:0.20~0.30 |
| F44 | S31254 | A182/A276/A479 | 0.02 | 0.8 | 1 | 0.03 | 0.01 | 17.5~18.5 | 19.5~20.5 | 6.0~6.5 | 0.50~1.00 | – | – | – | – | – | N:0.18–0.22 |
| F61 | S32550 | A182/A276/A479 | 0.04 | 1 | 1.5 | 0.04 | 0.03 | 4.5~6.5 | 24.0~27.0 | 2.9~3.9 | 1.50~2.50 | – | – | – | – | – | N:0.10~0.25 |
| XM-19 | S20910 | A193/A276/A479 | 0.06 | 1 | 4.0~6.0 | 0.045 | 0.03 | 11.5~13.5 | 20.5~23.5 | 1.50~3.00 | – | – | – | – | – | – | N:0.20~0.40 Cb:0.10~0.30 V:0.10~0.30 |
| B8S | S21800 | A193 | 0.1 | 3.5~4.5 | 7.0~9.0 | 0.06 | 0.03 | 8.0~9.0 | 16.0~18.0 | – | – | – | – | – | – | – | N:0.08~0.18 |
A smart factory built on real-time equipment data and AI analysis — delivering higher quality, fewer defects, and on-time delivery.
We collect operating and production data from every cutting machine in real time, then analyze it to drive higher quality, fewer defects, and reliable delivery.
Composition and dimensional inspection data is logged across every process, ensuring consistent quality through full pre-shipment verification.
AI analysis of accumulated equipment and production data detects defect factors in advance and prevents recurrence.
Real-time production monitoring enables accurate delivery forecasting, while remote control ensures flexible response to urgent orders.
Every step from order to shipment is digitally logged, so accurate production information is always available on request.
From carbon & alloy steel to stainless and nickel/special alloys.
主要船級の検査代行が可能です。
各種等級・規格別の熱処理が可能です（ASTM、JISなど）。加工後の納品まで対応します。
各種試験片を国際標準に従いKOLAS認証機関で試験・分析が可能です。
Certified to KS Q ISO 9001:2015 Quality Management System.
