... : 75x40, 100x50, 50x20, 125x65, 150x75 Standard: JIS standard U channel specification:U channelItem: U channelStandard: Japanese standardSteel grade: SS400BModel type: 75x40, 100x50, 50x20, 125x65, 150x75Length ... in to hot rolled channel steel and cold bend channel steel. Our main channel steel is hot rolled Japanese standard U channel. Usage: structual steel construction ...