ASTM A194 GR.8 ASTM A194 pecification covers a variety of carbon, alloy, and martensitic and austenitic stainless steel nuts. These nuts are intended for high-pressure or high-temperature service, or both. Bars from which the nuts are made shall be hot-wrought. According to ASTM A194 the material may be further processed by centerless grinding or by cold drawing. Austenitic stainless steel may be solution annealed or annealed and strain-hardened. Each alloy shall conform to the chemical composition requirements prescribed. Hardness tests, proof of load tests, and cone proof load tests shall be made to all nuts to meet the requirements specified. ASTM A194 stated in either inch-pound units or SI units are to be regarded separately as standard. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the specification. Within the text, the SI units are shown in brackets. ASTM A194 covers size range ? through 4 in. and metric M6 through M100 nominal. It also covers austenitic stainless steel nuts in the size range ? in. and M6 nominal and above. Unless otherwise specified, the American National Standard Heavy Hex Series (ANSI B 18.2.2) shall be used. Nuts up to and including 1 inch nominal size shall be UNC Series Class2B fit. Nuts over 1 inch nominal size shall be either UNC Series Class 2B fit or 8 UN Series Class 2B fit. High strength ASTM A194 grade 2H nuts are common in the marketplace海鹽全豐緊固件有限公司成立于2001年，（原海鹽新勝達緊固件廠）坐落于中國較大的緊固件生產基地-浙江省嘉興市海鹽縣 本廠坐落于海鹽開發區，地理環境優越，交通十分便利。本廠生產設備精良，技術力量雄厚，產品全部選用鋼材，進行嚴格的質量控制，產品合格率均達，暢銷全國。 海鹽全豐緊固件有限公司是一家致力于高強度緊固件，集生產、銷售、研發為一體的公司，本著“誠信經營、倡導規范”的經營理念，充分發揮地域和產業優勢，服務全國各地的客戶，提供具化的緊固件連接解決方案。 　我們整合制造、開發、和服務的各個環節，注重為客戶提供全面配套服務。憑借卓越的創業精神，以及嚴格管理，量生產，高精度檢驗，高標準服務！ 我們始終秉承 “以人為本”的管理理念，并堅持將“服務、質高價優、供貨快捷”作為自己的追求和對客戶的承諾。為了更好的服務客戶，提升公司的核心競爭力，我們不斷吸收先進的技術和管理理念，力求創新，注重品質，精心打造每一件產品，以充分滿足顧客的需求。 　　我廠主要生產的標準有：DIN，ANSI，BS，ISO，JIS，GB，UNI等標準、及非標產品：材質涉及：碳鋼，合金鋼，不銹鋼，銅，尼龍等：產品種類包括各種螺釘，螺栓，螺母，華司，銷類等。 生產設備：一摸二沖、多工位冷鐓機、CNC車床大型紅打設備及沖床。 另外我廠針對工程類行業提供解決方案，熱鍍鋅、達克羅不銹鋼螺栓螺帽等大批量定制，交期快，價格低，質量優！ 憑著的緊固件產品和真誠的服務贏得了社會各個領域客戶的認可，產品運用在機械、新能源，環保設備、醫療設備、通訊設備、電力設施、電子產品、食品機械、石油化工、船舶裝配、泵閥管道、建筑幕墻、露天場合等各種行業，產品受到廣大客戶一致好評。