Stainless Steel, Precipitation HardeningAMS 5629 (13-8)

A precipitation hardenable chromium-nickel-molybdenum martensitic stainless grade.

Precipitation hardening steels are characterised into one of three groups based on their final microstructures after heat treatment. The three types are: martensitic, semi-austenitic and austenitic.

Martensitic precipitation hardening stainless steels have a predominantly austenitic structure at annealing temperatures of around 1040 to 1065°C. Upon cooling to room temperature, they undergo a transformation that changes the austenite to martensite.

AMS5629 (13-8) is a martensitic precipitation hardening stainless steel. Heat treatment provides 13-8 with high strength. It comes in various conditions offering an array of properties. Good transverse toughness properties are achieved by tight chemical composition control, low carbon content, and vacuum melting.

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Related Specifications

AISI 632
AMS 5629
AMS 5864
ASTM A564 (XM-13)
ASTM A693 (XM-13)
ASTM A705 (XM-13)
DIN 1.4534
UNS S13800

Properties

Chemical Composition

Chemical Element	% Present
Carbon (C)	0.00 - 0.05
Chromium (Cr)	12.25 - 13.25
Manganese (Mn)	0.00 - 0.10
Silicon (Si)	0.00 - 0.10
Phosphorous (P)	0.00 - 0.01
Sulphur (S)	0.00 - 0.01
Nickel (Ni)	7.50 - 8.50
Molybdenum (Mo)	2.00 - 2.50
Aluminium (Al)	0.90 - 1.35
Nitrogen (N)	0.00 - 0.01
Iron (Fe)	Balance

General Physical Properties

Physical Property	Value
Density	7.75 g/cm³
Thermal Expansion	10.8 x 10^-6/K
Modulus of Elasticity	196 GPa
Thermal Conductivity	18.4 W/m.K
Electrical Resistivity	0.8 x 10^-6 Ω .m

Applications

Landing gear and aircraft structural parts
Valves
Shafts
Components in the petrochemical and nuclear industries
Motorsport components
Injection moulding equipment
Fittings and fasteners

Characteristics

Excellent strength
High hardness
Superior toughness
Excellent weldability
Good corrosion resistance
Excellent machinability

Additional Information

Mechanical Properties

Condition	Tensile Strength (MPa)	0.2% Proof Stress (MPa)	Elongation on 4D G.I. (%)	Hardness (HRC)
H950	1515	1413	10	45
H1000	1413	1310	10	43
H1025	1276	1207	11	41
H1050	1207	1138	12	40
H1100	1034	931	14	34
H1150	931	621	14	30

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Disclaimer

This Data is indicative only and as such is not to be relied upon in place of the full specification. In particular, mechanical property requirements vary widely with temper, product and product dimensions. All information is based on our present knowledge and is given in good faith. No liability will be accepted by the Company in respect of any action taken by any third party in reliance thereon. Please note that the 'Datasheet Update' date shown above is no guarantee of accuracy or whether the datasheet is up to date.

The information provided in this datasheet has been drawn from various recognised sources, including EN Standards, recognised industry references (printed S online) and manufacturers' data. No guarantee is given that the information is from the latest issue of those sources or about the accuracy of those sources. Material supplied by the Company may vary significantly from this data but will conform to all relevant and applicable standards. As the products detailed may be used for a wide variety of purposes and as the Company has no control over their use; the Company specifically excludes all conditions or warranties expressed or implied by statute or otherwise as to dimensions, properties and/or fitness for any particular purpose, whether expressed or implied. Advice given by the Company to any third party is given for that party's assistance only and without liability on the part of the Company. All transactions are subject to the Company's current Conditions of Sale. The extent of the Company's liabilities to any customer is clearly set out in those Conditions; a copy of which is available on request.