Maraging Steel BS S162 (DTD 5212 / AMS 6512)


Technical Data Sheet

Alloy 250 (UNS K92890 / Maraging 250/ DTD 5212) is an age-hardenable iron-nickel steel. Alloy 250 (DTD 5212) combines ultra-high strength (1800MPa), good toughness, readily machinable in pre-aged condition, excellent transverse properties and resistance to crack propagation.   Maraging 250 is used for missile and ejector systems, slat tracks and drive shafts. 

Chemical Composition Limits
Weight% C Si Mn P + S max Cr Mo Ni Ti Co Al
DTD 5212 0.015 max 0.10 max 0.10 max P 0.01
S 0.01		 0.25 max 4.6-5.2 17-19 0.3-0.6 7-8.5 0.05-0.15
BS S162 0.015 max 0.10 max 0.10 max P 0.01
S 0.01		 0.25 max 4.6-5.2 17-19 0.3-0.6 7-8.5 0.05-0.15
BS S162 is the aerospace equivalent of maraging 250

Typical Mechanical Properties

Grade Direction Yield Strength (0.2% Offset) Tensile Strength Elongation (%)
hbar tonfin² hbar tonfin²
DTD 5212 Longitudinal 170 min 110 min 180 min
200 max		 116 min
130 max		 8 min
DTD 5212 Transverse 170 min 110 min 180 min
200 max		 116 min
130 max		 5 min

 

Grade Condition Tensile Strength N/mm² Yield Strength N/mm² Elongation (%) Hardness
S162 Solution Treated - - - 321 max
S162 Solution Treated + Aged (Long) 1800-2000 1700 8 520-620 HV
S162 Solution Treated + Aged (Transverse) 1800-2000 1700 5 520-620 HV

Availability
Maraging 250 is available in Bar, Billets and Forging stock. For all stock availability contact Sales.

Specifications
UNS K92890
AMS 6512 Bar and Forging Stock
WS 1.6359
MIL-S-46850
BS S162 is available in Bars
DTD 5212 is available in Bars, Billets and Forgings
MSRR 6551
MAT 102
MIA 101

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Disclaimer
Every effort is made to ensure that technical specifications are accurate. However, technical specifications included herein should be used as a guideline only. All specifications are subject to change without notice.