| 1950's |
July '56 |
Technical agreement with CEFILAC of France approved for use of the Ugine Sejournet hot extrusion process. |
| Sept. '57 |
Full production began. |
| Oct. '58 |
Hot-finish processing plant and billet preparation plant completed. |
| Jan. '59 |
Cold-finish processing plant and related facilities completed. |
| 1960's |
Apr. '60 |
Use of JIS mark on products approved. |
| Nov. '60 |
Authorization as Lloyd-approved plant. |
| May '65 |
Authorization as TUV-approved plant. |
| Mar. '66 |
Specialized plant for manufacture of nuclear fuel cladding tube completed. |
| Apr. '67 |
Authorization as DNV-approved plant. |
| 1970's |
Sept. '70 |
Manufacturing facilities for nuclear fuel cladding tube expanded. |
| Apr. '71 |
Cited by the Hiroshima Bureau of the Ministry of International Trade and Industry (MITI) for outstanding performance as JIS plant. |
| Feb. '73 |
Workshop completed for inspection and packaging of stainless steel U-tube. |
| Mar. '75 |
Specialized production facilities completed for long-length, small-diameter tube. |
| Oct. '79 |
Cited by Minister of MITI for outstanding performance as JIS plant. |
| 1980's |
June '81 |
New plant completed for manufacture of nuclear fuel cladding tube. |
| Apr. '83 |
Authorization as KR(Korean Register of shipping) - approved plant. |
| Jan. '87 |
Plant for manufacture of precision stainless steel tube completed. |
| Oct. '88 |
Plant for manufacture of weld titanium tube completed. |
| Nov. '89 |
Awarded the 1989 Quality Control Award for factory by the Deming Prize Committee. |
| Dec. '89 |
Plant for manufacture of Excel Clean Pipe completed. |
| 1990's |
Dec. '91 |
Plant for manufacture of nuclear fuel cladding tube completed. |
| July '92 |
Authorized as ISO 9002 plant. |
| Apr. '96 |
Kobe Special Tube Co.,Ltd. established. |
| 2000's |
Apr. '00 |
Zircaloy fuel cladding tube section separated and established Zirco Products Co.,Ltd. |
| Nov. '02 |
Authorized as ISO 9001 company. (Version 2000) |
| Apr. '05 |
The total number of extruded pipes achieved 10,000,000 |
| July '05 |
Authorized as JISHA OSHMS. |
| Jan. '07 |
Use of new JIS mark on products approved. |
| Feb. '07 |
Authorized as ISO14001 company.(Version 2004) |
| Mar. '07 |
Plant for manufacture of Bright Annealing Pipes expanded. |
| May '07 |
Plant for manufacture of welded titanium tubes expanded. |
| Oct. '08 |
cold-finish processing plant expanded. |
| Apr. '16 |
Renamed as Kobelco Steel Tube Co.,Ltd. |
| Feb. '18 |
Authorized as ISO 14001 company.(Version 2015) |
| Aug. '18 |
Authorized as ISO 9001 company.(Version 2015) |
| Oct. '18 |
Specialized production facilities for coiled tubes completed. |
| Jan. '19 |
Manufacturing facilities for BA tubes expanded. |
| Jun. '20 |
Renames as Maruichi Stainless Tube Co., Ltd. |
| Oct. '21 |
Withdrawal from welded titanium tubes. |
| Oct. '21 |
Manufacturing facilities for coiled tubes expanded. |
| Aug. ’22 |
Maruichi Stainless Tube Texas Corporation. established. |
| Oct. ’22 |
Plant for manufacture of Bright Annealing Tubes expanded. |
