AISI 1045 / S45C
Common trade references: AISI/SAE 1045, JIS S45C
Stock range: 16mm to 620mm
A widely used medium carbon steel offering a practical balance of strength, toughness, and machinability for
mechanical parts.
Key Characteristics
• Higher strength and hardness potential than 1020 /
S20C
• Good for shafts, gears, studs, and machine parts
requiring better wear resistance
• Often used in normalized or heat-treated condition
depending on service demand
• Weldability is lower than low-carbon steel and
usually needs more control
Typical Uses
Shafts, axles, studs, bolts, gears, couplings, rollers, and
wear-related machine components.
Supply / Processing Notes
A common upgrade when mild steel is too soft. Heat
treatment can improve hardness and strength, but
section size and application must be checked.
YHF Value-Added Services
• Cut-to-size supply available
• Buy in short lengths instead of full standard piece.
• Flexible quantities starting from 1pc
• Fast quotation support and consultation
Navigate to:
A36 / S275 Plates
SS304L Pipes
SS304L Round Bars
SS316L Pipes
AISI 1020 / S20C Round Bars
AISI 1045 / S45C Round Bars
AISI 4130QT Round Bars
AISI 4140 / QT Round Bars
AISI 4340 Round Bars
API 5L B / A106 B Seamless Pipes
API 5L B Welded Pipes
EH36 / S355J2N / S355K2N Plates
ST52-0 / S355J2H Hollow Bars
ST52-3N / S355J2 Round Bars
