0.05C 17.5Ni-1.8Mo Low Alloy Steel

metal

A high-nickel, molybdenum-strengthened low-alloy steel designed for cryogenic and ultra-high-strength structural applications, where the elevated nickel content (17.5%) combined with molybdenum hardening and trace titanium provides both toughness at low temperatures and significant strength in the gigapascal range. This material family is primarily encountered in aerospace and defense sectors—particularly for landing gear, rocket casings, and deep-sea pressure vessels—where the combination of low-temperature impact resistance and high yield strength outweighs the cost and machinability trade-offs versus conventional steels. The low carbon content and nickel-molybdenum matrix chemistry make it notably more fracture-resistant than martensitic high-strength steels at equivalent strength levels, making it the preferred choice when cryogenic service or repeated shock loading is a design driver.

aerospace landing gearcryogenic pressure vesselsrocket motor casingsdeep-sea structural fastenersultra-high-strength forgingslow-temperature impact applications

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Elongation at Break(εf)	—	-	—	—
Ultimate Tensile Strength(σUTS)	—	ksi	—	—
Yield Strength (0.2% offset)(σy)	—	ksi	—	—

Verified Unverified Low confidence (<80%) Link to source

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.