17-4PH / 1.4542 / S17400
Precipitation Hardening Martensitic Stainless Steel

Corresponding Standards:

EN/DIN

  • 1.4542
  • X5CrNiCuNb16.4

AFNOR

  • Z6CNU17-O4

ASTM-A564

  • Grade 630

UNS

  • S17400

JIS

  • SUS630

BRANDS®

  • AL 17-4
  • Custom 630

Other

  • SAE AMS 5643
  • SAE AMS 5604
  • NACE MR01-75
  • ISO 15156
  • PED 97/23/CE
  • API 6A PSL4 (UT)
  • ASTM A388 (UT)
  • EN10088-3

17-4PH Stock Range:

Rolled or Forged, Machined Round Bar in 3-8m lengths or cut to size.

Full Mill Certs with all goods.

  Metric Imperial Cond. A.
Solution Annealed
Cond. H1150D
H1150+1150
dia 7.938 0.313 yes  
dia 9.53 0.375 yes yes
dia 12.70 0.500 yes yes
dia 15.88 0.625 yes yes
dia 19.05 0.750 yes yes
dia 22.23 0.875 yes yes
dia 25.40 1.000 yes yes
dia 28.58 1.125 yes yes
dia 31.75 1.250 yes yes
dia 35 1.378 yes yes
dia 38.1 1.500 yes yes
dia 41.28 1.625 yes yes
dia 44.45 1.750 yes yes
dia 47.63 1.875 yes yes
dia 50.8 2.000 yes yes
dia 53.98 2.125 yes yes
dia 57.15 2.250 yes yes
dia 60.33 2.375 yes yes
dia 63.5 2.500 yes yes
dia 69.85 2.750 yes yes
dia 76.2 3.000 yes yes
dia 82.55 3.250 yes yes
dia 88.9 3.500 yes yes
dia 95.25 3.750 yes yes
dia 101.6 4.000 yes yes
dia 107.95 4.250 yes yes
dia 114.3 4.500 yes yes
dia 120.65 4.750 yes yes
dia 127 5.000 yes yes
dia 133.34 5.250   yes
dia 139.7 5.500 yes yes
dia 146.05 5.750   yes
dia 152.4 6.000 yes yes
dia 165.1 6.500 yes yes
dia 177.8 7.000 yes yes
dia 190.5 7.500 yes yes
dia 203.2 8.000 yes yes
dia 215.9 8.500 yes yes
dia 228.6 9.000 yes yes
dia 241.3 9.500 yes yes
dia 254 10.000 yes yes
dia 266.7 10.500 yes  
dia 279.4 11.000 yes yes
dia 304.8 12.000 yes yes
dia 355.6 14.000   yes
dia 360 14.173 yes  
dia 374.65 14.750   yes
dia 410 16.142 yes yes
dia 457.2 18.000   yes
dia 460 18.110 yes  
dia 510 20.079   yes

View ISO Tolerances

Cross Rolled, Solution Annealed Plate Hot Rolled, Solution Annealed, Descaled, Pickled to ASTM A693 & AMS 5604.

Full Mill Certs supplied with all goods.

  Thickness Width
  Metric Imperial Metric Imperial
  13.0 0.512" 790/800 31.102/31.496"
  16.0 0.630" " "
  20.0 0.787" " "
  26.0 1.024" " "
  32.0 1.260" " "
  40.0 1.575" " "
  60.0 2.362" " "
  80.0 3.150" " "

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INTOCO UK and Europe - 17-4PH / 17/4PH / UNS S17400 / 1.4542 / 1.4548 / AISI 630 Martensitic Precipitation Hardening stainless steel.

Intoco, a UK based manufacturing company, specialise in 'no-compromise' manufacture using state of the art CNC equipment, and the finest steels available. Intoco are also a very large UK and European stock-holder of hot work tool steels, stainless steels (440c / 1.4125 / 4125 / X105CrMo17 and F51 / 1.4462 / X2CrNiMoN22 Duplex) and now 17-4PH / 17/4PH / Euronorm 1.4542 / 1.4548 / Type AISI Type 630 ASTM A693 / A564 grade 630 / AMS 5604B / AFNOR Z6CNU17-04 / Din EN X5CrNiCuNb16.4 / JIS SUS630 stainless steel (Acier, inoxydable, Rostfreier, Stahl, Acciaio, Inossidabile, Aco, Inoxidável, Acero, Inox, Inoxidables, Rostfrei, Roestvrij) in round bar form.

17-4PH is stocked by Intoco in condition A / Con.A / Cond.A / solution annealed and H1150 + 1150 precipitation double aged age hardened, bright machined quality bar. The double aged H1150 + 1150 is hardened in accordance with NACE MR-0175 or ASTM A564 condition H1150D, this is twice aged for 4 hours @ 620 degrees centigrade / 620°C (or 1150 degrees F / 1150°F). H1150D is the more common standard of supply. H1150M (which is age hardened 2 hrs @ 760 degrees C + 4 hours @ 620°C) gives better impact properties with slightly less strength (yield strength 115 KSI compared to 125 ksi). The second aging on H1150+1150 is used to bring down the hardness values. It was found that resistance to sulfid stress-cracking is given at a maximum hardness of 33 HRC. Technically there are two processes taking place at aging: copper precipitation and formation of reversion martensite. After the first aging, the microstructure is made of hardened martensite with a depleted Cu (copper) content, reversion austenite and some amount of ferrite and primary, i.e. original retained austenite. During the second aging, hardening will not resume, but additional reversion austenite can form, thus increasing toughness.

The 17-4 PH / 1.4542 grade of stainless (Acier, inoxydable, Rostfreier, Stahl, Acciaio, Inossidabile, Aco, Inoxidável, Acero, Inox, Inoxidables, Rostfrei, Roestvrij) combines high strength, hardness (upto 300 degrees C) and corrosion resistance. The mechanical properties can be optimized with heat treatment. 17/4 PH should not be used at temperatures above 300 degrees C / 572 degs. F, or at very low temperatures. It has adequate resistance to atmospheric corrosion, or in diluted acids or salts where it's corrosion resistance is equal to stainless grade 304 or 430 in most media, including some industries in chemical, petroleum, paper, dairy and food processing. Alloy 17-4PH / 1.4542 withstands corrosive attacks better than any of the standard hardenable stainless steels.

17-4PH / 17/4PH / Euronorm 1.4542 / 1.4548 / Type AISI Type 630 ASTM A693 grade 630 / AMS 5604B / AFNOR Z6CNU17-04 / Din EN X5CrNiCuNb16.4 / JIS SUS630 stainless steel (Acier, inoxydable, Rostfreier, Stahl, Acciaio, Inossidabile, Aco, Inoxidável, Acero, Inox, Inoxidables, Rostfrei, Roestvrij) can be used for pump shafts, propeller shafts, gear wheels, bearings, bolts, spindles, foils, deck platforms, turbine blades, mechanical components, nuclear waste casks, valve internal components, pulp & paper industry products, temperture sensor products, etc.

17-4PH / 17/4PH / Euronorm 1.4542 / 1.4548 / Type AISI Type 630 ASTM A693 grade 630 / AMS 5604B / AFNOR Z6CNU17-04 / Din EN X5CrNiCuNb16.4 / JIS SUS630 stainless steel can also be manufactured to aircraft standard AMS 5643 / 5622 (MSRR 6601) vacuum arc remelt (VAR) which gives the grade good transverse properties as well as being corrosion resistant and having medium to high strengths in the appropriate aged condition. Mechanical properties are defined by the appropriate temperature for the relevant H condition (h900 / h1000 / h1025 / h1050 / h1100 / h1150 / h1150+1150 / h1150M - Hxxx condition = aged at xxx degrees F). The 17-4PH / 17/4PH / Euronorm 1.4542 / 1.4548 / Type AISI Type 630 ASTM A693 grade 630 / AMS 5604B / AFNOR Z6CNU17-04 / Din EN X5CrNiCuNb16.4 / JIS SUS630 stainless steel material is NACE MR0175 approved.

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Intoco, Bamfurlong Industrial Park, Staverton, Gloucestershire, GL51 6SX England
T: +44(0)1452 712519

Company Number 01060362

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