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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 (%)
Grade	Direction	hbar	tonfin²	hbar	tonfin²	Elongation (%)
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.