Mecasteel™ 17-4

Prehardened engineering stainless steel

Mecasteel 17 – 4 is a precipitation hardening stainless steel grade. It combines high strength and hardness, with good toughness and corrosion resistance.

Mecasteel 17 – 4 is delivered in age – hardened condition, with yield strength ranging from 100 ksi to 145 ksi. It is available directly from the mill either in forgings of large dimensions, width 78“ (2000 mm), thickness up to 25“ (635 mm), or custom blocks saw cut from master blocks ready to machine.

This grade can be used for massive steel components, especially for oil and gas exploration and production (pump fluid ends, manifolds,…).

Chemical analysis

Typical values (weight%). Mecasteel 17 – 4 meets chemical analysis requirements of ASTM A705/ 705M for grade 630 (UNS S17400). Mecasteel 17 – 4 is delivered with very low sulphur, to enhance isotropic ductility.

C P S Cr Ni Cu Nb + Ta
0.035 < 0.025 0.001 16.0 4.80 3.40 0.30

Mechanical properties

Mecasteel 17 – 4 is delivered with a solution annealed heat treatment, followed by age – hardening treatment. Temperature of age – hardening treatment is adjusted depending on targeted level of mechanical properties.

YS 0.2% min
ksi (MPa)
UTS min
ksi (MPa)
Elongation
(%)
RA (%) Hardness
(HB)
Charpy V Notch
ft.lb (J)
145 (1000) 155 (1070) 10 25 340 – 380 Single at – 20°F
Average at – 20°F
15 (20)
20 (27)
125 (860) 145 (1000) 12 35 310 – 350 Single at – 20°F
Average at – 20°F
20 (27)
25 (34)
100 (690) 125 (860) 14 45 290 – 330 Single at – 40°F
Average at – 40°F
20 (27)
25 (34)

Delivery conditions

Manufacturing programme

  • Square blocks with thickness up to 25” (635 mm), width up to 78” (2000 mm), length up to 160” (4000 mm)
  • Custom saw cut blocks are also available


For more technical details :

 

Mecasteel™ 17-4

Download the complete datasheet


Technical data and information are to the best of our knowledge at the time of publication. However, they may be subjected to some slight variations due to our ongoing research programmes. Therefore, we suggest that information be verified at time of enquiry or order. Furthermore, in service, real conditions are specific for each application. The data presented here are for the purpose of description only, and can be considered as guarantees only when written formal approval has been provided by our company. Industeel reserves the right to change its product range at any time without prior notice.