0.09C 8.0Cr-1.9Mo-9.8Ni Low Alloy Steel

metal

A ultra-high-strength, precipitation-hardened maraging steel with exceptional damage tolerance, designed for critical aerospace and defense applications where fracture resistance and fatigue performance are paramount. The high nickel (9.8%) and molybdenum (1.9%) content, combined with controlled carbon (0.09%) and chromium (8.0%), produces a material that achieves extreme yield strength while maintaining modest ductility—a balance rarely achieved in conventional alloys. This composition is typically chosen over competing high-strength steels (4340, 300M) when engineers need superior fracture toughness-to-strength ratios, excellent cryogenic performance, and repeatable precision in demanding structural applications.

aircraft landing gear and structural componentsmissile casings and warhead applicationshigh-performance aerospace fastenerscryogenic storage vessels and plumbinghigh-cycle fatigue-critical structuresaerospace and defense pressure vessels

Compliance & Regulations

?ISO 10993?Conflict Free?RoHS?REACH?TSCA?Prop 65

Units:

si imperial

Property OverviewNormalized to typical max values

Property	Value	Unit	Conditions
Elongation at Break(εf)	12.00	-	—
Ultimate Tensile Strength(σUTS)	1.599	GPa	—
Yield Strength (0.2% offset)(σy)	1.556	GPa	—

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Regulatory Screening

Environmental

Safety & Biocompatibility

Quality & Standards

Industry-Specific

RoHS, REACH, and Prop 65 statuses are validated against official substance lists (ECHA SVHC Candidate List, OEHHA Prop 65, RoHS Annex II). Other regulations are estimated from composition and material classification. All screening is a starting point for due diligence — always verify with your supplier before making compliance decisions.