Stainless Steel – Grade 310, SUS310, SUS310S, UNS S31008, 1.4840, 104845

Chemical Formula

Fe, <0.25% C, 24-26% Cr, 19-22% Ni, <2% Mn, <1.5% Si, <0.45% P, <0.3% S


SUS310, combining excellent high temperature properties with good ductility and weldability, is designed for high temperature service. It resists oxidation in continuous service at temperatures up to 1150°C provided reducing sulphur gases are not present. It is also used for intermittent service at temperatures up to 1040°C.

SUS310S (UNS S31008) is used when the application environment involves moist corrodents in a temperature range lower than that which is normally considered “high temperature” service. The lower carbon content of 310S does reduce its high temperature strength compared to SUS310.

Like other austenitic grades these have excellent toughness, even down to cryogenic temperatures, although other grades are normally used in this environment.

Heat Resistance

Good resistance to oxidation in intermittent service in air at temperatures up to 1040°C and 1150°C in continuous service. Good resistance to thermal fatigue and cyclic heating. Widely used where sulphur dioxide gas is encountered at elevated temperatures. Continuous use in 425-860°C range not recommended due to carbide precipitation, if subsequent aqueous corrosion resistance is needed, but often performs well in temperatures fluctuating above and below this range.

SUS310 is generally used at temperatures starting from about 800 or 900°C – above the temperatures at which SS304H and SS321 are effective.

Heat TreatmentSolution Treatment (Annealing) – heat to 1040-1150°C and cool rapidly for maximum corrosion resistance. This treatment is also recommended to restore ductility after each 1000 hours of service above 650°C, due to long term precipitation of brittle sigma phase.

Applications include:

  • Furnace parts
  • Oil burner parts
  • Carburising boxes
  • Heat Treatment baskets and jigs
  • Heat Exchangers
  • Welding filler wire and electrodes

E Steel Sdn Bhd ,Most common stainless steel  grades available :

  • 303 (UNS30300) stainless steel
  • 304 (UNS30400) stainless steel
  • 309 (UNS30900) stainless steel
  • 310 (UNS31008) stainless steel
  • 316 (UNS31600) stainless steel
  • 316Ti (UNS31635) stainless steel
  • 317L (UNS31703) stainless steel
  • 321 (UNS32100) stainless steel
  • 347 (UNS34700) stainless steel
  • 403 (UNS40300) stainless steel
  • 409 (UNS40900) stainless steel
  • 410 (UNS41000) stainless steel
  • 416 (UNS41600) stainless steel
  • 420 (UNS42000) stainless steel
  • 430 (UNS43000) stainless steel
  • 431 (UNS43100) stainless steel
  • 440C (S44004) stainless steel
  • 2205 (UNS31803) stainless steel
  • 2507 (UNS32750) stainless steel
  • 17CR-4NI (UNS17400) stainless steel
  • NITRONIC 50 (UNS20910) stainless steel
  • NITRONIC 60 (UNS21800) stainless steel
Low Mang Kok B: Klang, Selangor, 18.12.1973; P: Low Chong Seng 1948; Lee Sok Yen 1952; MS: Chua Hooi Koon 1976; Ch: Low Chun Leong 1998; Low Chun Ee 2002; E: 1980 - 1985 SJK (C) Pin Hua 1 - Primary School; 1986 - 1991 SM Kwang Hua - Secondary School; 1992 - 1993 College WIT - Electronic technician; Ca: 1992 - 1993 Lion Suzuki Motor Sdn. Bhd. - Sales Executive; 1993 - 1994 Great Eastern Life Assurance (Malaysia) Berhad - Insurance Agent; 1994 - 1998 Kimwin Special Steel Sdn. Bhd. - Sales Executive; 1998 - 2000 ASSAB Steels (Malaysia) Sdn. Bhd. - Sales Engineer ; 2000 - 2004 Kimwin Special Steel Sdn. Bhd. - Freelancer Sales ; 2004 - 2010 EE TECK Marketing - Founder and Managing Director; 2010 - 2019 E Steel Sdn. Bhd - Founder and Managing Director; WaCW: Global Business Magazine - Asia Pacific Top Excellence Brand 2011; International Prestige Brand Award Book & Record 2017; Aw: Asia Pacific Top 100 Excellence Brand In Year 2011; International Prestige Brand Of The Year 2017; Me: China Entrepreneur Club; LS: English, Malay, Mandarin, Cantonese, Teochew, Hokkien; H: Gardening; Online Marketing; PMM: To develop Steel business globally through online new business model; RoS: Self discipline; Keep learning and always look for solution instead focus on problem; Web: Your index: Industry, Trade and Services Successful People in Malaysia (2nd Edition) Release date: December 2020 ( BPH - British Publishing House Ltd )