Z 7 CNU 16-04, Z7CNU16-04 is a good corrosion resistance and excellent strength precipitation hardened martensitic stainless steel alloy suitable for a wide variety of applications in the commercial, oil and gas, aerospace, and nuclear industries. It’s suitable for intricate parts requiring corrosion resistance and high strength that can be heat treated and welded with minimal distortion due to its precipitation hardening capabilities acc. to AMS 5643, DMD 229-20, NACE MR 0175 (H1150 condition), ASTM A 564 / NF EN 10088-3 (X 5 Cr Ni Cu Nb 16-4)
Z 7 CNU 16-04, Z7CNU16-04 - Introduction and Application
Age-hardening martensitic stainless steel offering high strength and hardness along with good corrosion resistance (comparable to that of 304 type stainless steels).
This steel has to be used in the age-hardened condition.Three aged conditions are available on stock meeting the requirements of aerospace and oilfield engineering (double temper according to NACE MR 0175), i.e. H1150 condition (temper at 620°C = 1150°F), H1025 condition (temper at 550°C = 1025°F) and H1075 (temper at 580°C = 1075°F).
Starting from solution treated stock material (A condition), different strength levels may be obtained after age-hardening on rough machined parts, depending on the aging temperature used. For example, this steel can be hardened up to 40-46 HRC by heating solution treated material to a temperature of 480°C for one hour(H900 condition).
Aerospace (aircraft fittings, fasteners, missiles and jet engine parts). Oilfield engineering (valve parts, pump shafts, probes,....). Agri-business and paper mill equipments. Instruments. Surgical and orthopedic ancillary equipments.
Air 9160/C
AMS 5643
DMD 229-20
NACE MR 0175 (H1150 condition)
ASTM A 564 / NF EN 10088-3 (X 5 Cr Ni Cu Nb 16-4)
Further specifications on request (LW, NFS....)
Melted process
ESR
Z 7 CNU 16-04, Z7CNU16-04 - Chemical composition WT %
Grades
Chemical Composition WT %
C
Mn
Si
P
S
Cr
Ni
Mo
Nb
Cu
N
Z 7 CNU 16-04, Z7CNU16-04
Max 0.07
Max 1.0
Max 1.0
Max 0.04
Max 0.03
15.0 - 17.5
3.0 - 5.0
-
0.15 - 0.45
3.0 - 5.0
-
Mechanical Property of Z 7 CNU 16-04, Z7CNU16-04
Delivery condition +A:
HRC Hardness: Max 38
HB Hardness: Max 363
Delivery condition H900
Tensile strength, Rm: >1310 MPa
Yield point, RP0,2: >1170 MPa
Elongation, A: >10%
Contraction, Z: >40%
HB Hardness: >388
HRC Hardness: >40
Delivery condition H925
Tensile strength, Rm: >1170 MPa
Yield point, Rp0,2: >1070 MPa
Elongation, A: >10%
Przewężenie, Z: >44%
HB Hardness: >375
HRC Hardness: >38
Impact resistance, KV21℃: >6.8 J
Delivery condition H1025
Tensile strength, Rm: >1070 MPa
Yield point, Rp0,2: >1000 MPa
Elongation, A: >12%
Contraction, Z: >45%
HB Hardness: >331
HRC Hardness: >35
Udarność, KV21℃: >20 J
Delivery condition H1075
Tensile strength, Rm: >1000 MPa
Yield point, Rp0,2: >860 MPa
Elongation, A: >13%
Contraction, Z: >45%
HB Hardness: >311
HRC Hardness: >32
Impact resistance, KV21℃: >27 J
Delivery condition H1100
Tensile strength, Rm: >965 MPa
Yield point, Rp0,2: >795 MPa
Elongation, A: >14%
Contraction, Z: >45%
HB Hardness: >302
HRC Hardness: >31
Impact resistance, KV21℃: >34 J
Delivery condition H1150
Tensile strength, Rm: >930 MPa
Yield point, Rp0,2: >725 MPa
Elongation, A: >16%
Contraction, Z: >50%
HB Hardness: >277
HRC Hardness: >28
Impact resistance, KV21℃: >41 J
Delivery condition H1150M
Tensile strength, Rm: >795 MPa
Yield point, Rp0,2: >520 MPa
Elongation, A: >18%
Contraction, Z: >55%
HB Hardness: >255
HRC Hardness: >24
Impact resistance, KV21℃: >75 J
Delivery condition H1150D
Tensile strength, Rm: >860 MPa
Yield point, Rp0,2: >725 MPa
Elongation, A: >16%
Contraction, Z: >50%
HB Hardness: >255
HRC Hardness: >24
Impact resistance, KV21℃: >41 J
Mechanical properties for Cold-rolled tapes and Hot-rolled sheets 17-4PH, 630, 05Cr17Ni4Cu4Nb, S17400, 1.4542, X5CrNiCuNb17-4-4
Delivery condition of cold-rolled tapes +AT
Tensile strength, Rm: Max 1275 MPa
Elongation, A: >5%
Delivery condition of cold-rolled tapes +P1300
Tensile strength, Rm: >1300 MPa
Yield point, Rp0,2: >1150 MPa
Elongation, A: >3%
Delivery condition of cold-rolled tapes +P900
Tensile strength, Rm: >900 MPa
Yield point, Rp0,2: >700 MPa
Elongation, A: >6%
Delivery condition of hot-rolled sheets +P1070
Tensile strength, Rm: 1070 - 1270 MPa
Yield point, Rp0,2: >1000 MPa
Elongation A: >8%
Delivery condition of hot-rolled sheets +P950
Tensile strength, Rm: 950 - 1150 MPa
Yield point, Rp0,2: >800 MPa
Elongation, A: >10%
Delivery condition of hot-rolled sheets +P850
Tensile strength, Rm: 850 - 1050 MPa
Yield point, Rp0,2: >600 MPa
Elongation, A: >12%
Delivery condition of hot-rolled sheets +SR630
Tensile strength, Rm: Max 1050 MPa
Mechanical properties of 17-4PH, 630, 05Cr17Ni4Cu4Nb, S17400, 1.4542, X5CrNiCuNb17-4-4
Delivery condition +AT
Tensile strength, Rm: Max 1200 MPa
Hardness, HB: Max 360
Delivery condition +P800
Properties at elevated temperature in delivery condition +P800
100℃ - Yield point, Rp0,2: >500 MPa
150℃ - Yield point, Rp0,2: >490 MPa
200℃ - Yield point, Rp0,2: >480 MPa
250℃ - Yield point, Rp0,2: >470 MPa
300℃ - Yield point, Rp0,2: >460 MPa
Tensile strength, Rm: 850 - 1100 MPa
Yield point, Rp0,2: >520 MPa
Elongation, A: >10%
Impact resistance, KV20℃: >75 J
Delivery condition +P930
Properties at elevated temperature in delivery condition +P930
100℃ - Yield point, Rp0,2: >680 MPa
150℃ - Yield point, Rp0,2: >660 MPa
200℃ - Yield point, Rp0,2: >640 MPa
250℃ - Yield point, Rp0,2: >620 MPa
300℃ - Yield point, Rp0,2: >600 MPa
Tensile strength, Rm: 930 - 1100 MPa
Yield point, Rp0,2: >720 MPa
Elongation, A: >12%
Impact resistance, KV20℃: >40 J
Delivery condition +P960
Properties at elevated temperature in delivery condition +P960
100℃ - Yield point, Rp0,2: >730 MPa
150℃ - Yield point, Rp0,2: >710 MPa
200℃ - Yield point, Rp0,2: >690 MPa
250℃ - Yield point, Rp0,2: >670 MPa
300℃ - Yield point, Rp0,2: >650 MPa
Tensile strength, Rm: 960 - 1160 MPa
Yield point, Rp0,2: >790 MPa
Elongation, A: >12%
Delivery condition +P1070
Properties at elevated temperature in delivery condition +P1070
100℃ - Yield point, Rp0,2: >880 MPa
150℃ - Yield point, Rp0,2: >830 MPa
200℃ - Yield point, Rp0,2: >800 MPa
250℃ - Yield point, Rp0,2: >770 MPa
300℃ - Yield point, Rp0,2: >750 MPa
Tensile strength, Rm: 1070 - 1270 MPa
Yield point, Rp0,2: >1000 MPa
Elongation, A: >10%
Physical Property of Z 7 CNU 16-04, Z7CNU16-04
Heat capacity, c-1
Heat conductivity, λ: 16 W * m-1
Modulus of elasticity, E: 200 GPa
Density: 7.8 g/cm3
Linear Expansion Factor, α-1
Elastic Modulus (GPa)
Mean Co-eff of Thermal Expansion (µm/m/°C)
Thermal Conductivity (W/m.K)
Specific Heat 0-100°C (J/kg.K)
Elec Resistivity (nΩ.m)
0-100°C
0-315°C
0-538°C
At 100°C
At 500°C
630
7750
197
10.8
11.6
-
18.4
22.7
460
800
Heat Treatment of Z 7 CNU 16-04, Z7CNU16-04
Forging and rolling at 1150 - 900 ℃ with cooling in the air
Annealing at 1020 - 1055 ℃ with cooling in oil or air
Ageing for +P800 condition at 760 ℃ in the air for 2h + 620 ℃ in the air for 4h
Ageing for +P850 condition at 610 - 630 ℃ in the air for 4h
Ageing for +P900 condition at 590-610 ℃ in the air for 1h
Aging for +P930 condition at 620℃ in the air for 4h
Ageing for +P950 condition at 580 - 600℃ in the air for 1h
Aging for +P960 condition at 590℃ in the air for 4h
Aging for +P1070 condition at 550℃ in the air for 4h
Ageing for +P1300 condition at 470 - 490℃ in the air for 1h
Welding of Z 7 CNU 16-04, Z7CNU16-04
Z 7 CNU 16-04, Z7CNU16-04 can be welded using all conventional methods, and they do not require pre-heating. Care should be taken in designing and welding of high strength steels to prevent weldment stresses.
Machining of Z 7 CNU 16-04, Z7CNU16-04
Z 7 CNU 16-04, Z7CNU16-04 can be machined in their solution-treated condition. They have machining rates similar to that of grade 304 steels.
Equivalent grades of Z 7 CNU 16-04, Z7CNU16-04
PH17-4, 17-4, 17-4PH, 17-4 H1025, 17-4 H1075, 174 H1150, 174 HH1150, 17Cr-4Ni, AISI 630, UNS S17400, DIN 1.4542, 05CR17NI4CU4NB, 1.4540, X4CRNICUNB16-4, X 4 CRNICUNB 16-4, 0CR17NI4CU4NB, 1.4542, X5CRNICUNB16-4, X 5 CRNICUNB 16-4, Z7CNU16-04, Z 7 CNU 16-04, Z 7 CNU 17-04, Z7CNU17-04, 1.4548, X5CRNICUNB17-4-4, X 5 CRNICUNB 17-4-4, 4542-174-00-I, 17-4 DP, AISI 630, SUS 630, SUS630, ASTM A693 TYPE 630, ASTM A564 TYPE S17400, ASTM A705 TYPE 630, ASTM A1082 TYPE 630 S17400, 07CH16N4D4B-SH, 07Х16Н4Д4Б-Ш, 07CH14N4DB, 07Х14Н4ДБ, 05CH16N4D2B, 05Х16Н4Д2Б, AMS 5604, AMS 5622, AMS 5643, AMS 5803, AMS 5825, 17-4 PH, PH17-4, Type 630 Stainless, SAT Type 630, 17Cr-4Ni, Custom 630, DIN 1.4542, DIN X5CrNiCuNb16-4, DIN X5CrNiCuNb17-4, AFNOR Z7CNU15-05, AFNOR Z7CNU17-04, BS X5CrNiCuNb16-4, AISI 630, AISI 630 (17-4PH), SAE 630, SAE 17-4PH, SAE 630 (17-4PH), JIS SUS630, JIS SUSF630, JIS SCS24, EN X5CrNiCuNb16-4, EN 1.4542, ISO X5CrNiCuNb16-4, ISO PP20I, ISO 4542-174-00-I, GB 05Cr17Ni4Cu4Nb, UNS S17400