AISI 4130 QT Round Bars

Common trade references: AISI/SAE 4130 QT, JIS SCM430

Stock range: 25mm - 850mm OD

A Cr-Mo alloy steel used when higher strength-to-weight ratio, better hardenability, and more demanding
mechanical service are required.

Key Characteristics

• Higher strength potential than plain carbon steels
• Good hardenability and common use in heat-treated
condition
• Suitable for more demanding shafts, fasteners,
connectors, and engineering parts
• Welding may be possible with proper procedure
control depending on section and condition

Typical Uses

High-strength shafts, connectors, studs, couplings,
machine parts, and engineering components under
higher stress.

Supply / Processing Notes

Heat treatment condition matters. Always align
machining, welding, and service expectations with the
actual supplied condition and project specification.

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

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