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Complex Phase steels

Description

The Complex Phase family of steels supplements ArcelorMittal's AHSS (Advanced High Strength steel) product range. These steels are cold formed to make lightweight structural elements. A number of automotive parts, such as sills and door reinforcements, have simple shapes and the steel is therefore only slightly deformed. For this reason, ArcelorMittal has added the Complex Phase family of steels to its range. These steels offer high as-delivered yield strength and good bendability and stretch flangeability.

Applications

Given their high energy absorption capacity and fatigue strength, these grades are particularly well suited for automotive safety components requiring good impact strength and for suspension system components.

  • Seat flange in CR360Y590T-CP (thickness: 1.5 mm)

  • Door beam in CR780Y980T-CP (thickness: 2 mm)

  • Tunnel stiffener in CR570Y780T-CP (thickness: 1.6 mm)

  • Bumper beam in HR800Y950T-CP (roll-formed)

  • Bumper beam in HR800Y950T-CP (roll-formed)

  • Suspension arm in HR660Y760T-CP (thickness: 3.1 mm)

Designation and standard

Show all
ArcelorMittal name Generic name Euronorms VDA 239-100 ABNT NBR
CR360Y590T-CP CP600 HCT600C (+ZE)
CR500Y780T-CP CP800Y500
CR570Y780T-CP CP800Y600 HCT780C (+ZE,+Z) CR570Y780T-CP (-UNC,-EG,-GI)
CR780Y980T-CP CP1000Y800 HCT980C (+ZE,+Z) CR780Y980T-CP (-UNC,-EG,-GI) CP1000-B / CP1000-HE
CR360Y590T-CP / CP600
Euronorms HCT600C (+ZE)
VDA 239-100
ABNT NBR
CR500Y780T-CP / CP800Y500
Euronorms
VDA 239-100
ABNT NBR
CR570Y780T-CP / CP800Y600
Euronorms HCT780C (+ZE,+Z)
VDA 239-100 CR570Y780T-CP (-UNC,-EG,-GI)
ABNT NBR
CR780Y980T-CP / CP1000Y800
Euronorms HCT980C (+ZE,+Z)
VDA 239-100 CR780Y980T-CP (-UNC,-EG,-GI)
ABNT NBR CP1000-B / CP1000-HE
Show all
ArcelorMittal name Generic name Euronorms VDA 239-100 ABNT NBR
HR550Y650T-CP HR550Y650T-CP
HR620Y750T-CP HR CP750 HDT750C (+Z) CP780
HR660Y760T-CP HR CP800 HDT780C (+Z) HR660Y760T-CP (-UNC,-GI) CP800
HR800Y950T-CP HR CP1000 HDT950C (+Z)
HR550Y650T-CP / HR550Y650T-CP
Euronorms
VDA 239-100
ABNT NBR
HR620Y750T-CP / HR CP750
Euronorms HDT750C (+Z)
VDA 239-100
ABNT NBR CP780
HR660Y760T-CP / HR CP800
Euronorms HDT780C (+Z)
VDA 239-100 HR660Y760T-CP (-UNC,-GI)
ABNT NBR CP800
HR800Y950T-CP / HR CP1000
Euronorms HDT950C (+Z)
VDA 239-100
ABNT NBR


  • Euronorms

    Uncoated (EN 10268: 2006 + A1: 2013): Steel grade name
    Electrogalvanized (EN 10268: 2006 + A1: 2013 + EN 10152: 2017): Steel grade name + ZE
    Galvannealed (EN 10346: 2015): Steel grade name+ZF
    Extragal® (EN 10346: 2015): Steel grade name+Z
    Zagnelis® (EN 10346: 2015): Steel grade name+ZM

  • VDA 239-100

    Uncoated : Steel grade name-UNC
    Electrogalvanized : Steel grade name-EG
    Galvannealed : Steel grade name-GA
    Extragal®: Steel grade name-GI
    Zagnelis®: Steel grade name+ZM

Mechanical properties

Show all
ArcelorMittal name Generic name Direction Yield stress Rp0.2 (MPa) Tensile strength Rm (MPa) Type 1 Min. A50mm (%) Type 2 Min. A80mm (%) Type 3 Min. A50mm (%) Min. BH2 MPa
CR360Y590T-CP CP600 RD 360 - 440 600 - 700 19 19 20 30
CR500Y780T-CP CP800Y500 RD 500 - 620 780 - 900 12 12 13 30
CR570Y780T-CP CP800Y600 RD 570 - 720 780 - 920 10 10 11 30
CR780Y980T-CP CP1000Y800 RD 780 - 950 980 - 1140 6 6 7 30
CR360Y590T-CP / CP600
Direction RD
Yield stress Rp0.2 (MPa) 360 - 440
Tensile strength Rm (MPa) 600 - 700
Type 1 Min. A50mm (%) 19
Type 2 Min. A80mm (%) 19
Type 3 Min. A50mm (%) 20
Min. BH2 MPa 30
CR500Y780T-CP / CP800Y500
Direction RD
Yield stress Rp0.2 (MPa) 500 - 620
Tensile strength Rm (MPa) 780 - 900
Type 1 Min. A50mm (%) 12
Type 2 Min. A80mm (%) 12
Type 3 Min. A50mm (%) 13
Min. BH2 MPa 30
CR570Y780T-CP / CP800Y600
Direction RD
Yield stress Rp0.2 (MPa) 570 - 720
Tensile strength Rm (MPa) 780 - 920
Type 1 Min. A50mm (%) 10
Type 2 Min. A80mm (%) 10
Type 3 Min. A50mm (%) 11
Min. BH2 MPa 30
CR780Y980T-CP / CP1000Y800
Direction RD
Yield stress Rp0.2 (MPa) 780 - 950
Tensile strength Rm (MPa) 980 - 1140
Type 1 Min. A50mm (%) 6
Type 2 Min. A80mm (%) 6
Type 3 Min. A50mm (%) 7
Min. BH2 MPa 30
Show all
ArcelorMittal name Generic name Direction Yield stress Rp0.2 (MPa) Tensile strength Rm (MPa) Min. A(%) Type 1 Min. A50mm (%) Type 2 Min. A80mm (%) Type 3 Min. A50mm (%) Min. BH2 MPa
HR550Y650T-CP HR550Y650T-CP RD 550 - 700 650 - 800 15 14 14 15 30
HR620Y750T-CP HR CP750 RD 620 - 750 ≥ 750 13 10 10 11 30
HR660Y760T-CP HR CP800 RD 660 - 820 760 - 960 13 10 10 11 30
HR800Y950T-CP HR CP1000 RD ≥ 800 ≥ 950 10 9 11 30
HR780Y980T-CP-SF HR CP1000SF TD 780 - 970 980 - 1120 13 10 10 10
HR550Y650T-CP / HR550Y650T-CP
Direction RD
Yield stress Rp0.2 (MPa) 550 - 700
Tensile strength Rm (MPa) 650 - 800
Min. A(%) 15
Type 1 Min. A50mm (%) 14
Type 2 Min. A80mm (%) 14
Type 3 Min. A50mm (%) 15
Min. BH2 MPa 30
HR620Y750T-CP / HR CP750
Direction RD
Yield stress Rp0.2 (MPa) 620 - 750
Tensile strength Rm (MPa) ≥ 750
Min. A(%) 13
Type 1 Min. A50mm (%) 10
Type 2 Min. A80mm (%) 10
Type 3 Min. A50mm (%) 11
Min. BH2 MPa 30
HR660Y760T-CP / HR CP800
Direction RD
Yield stress Rp0.2 (MPa) 660 - 820
Tensile strength Rm (MPa) 760 - 960
Min. A(%) 13
Type 1 Min. A50mm (%) 10
Type 2 Min. A80mm (%) 10
Type 3 Min. A50mm (%) 11
Min. BH2 MPa 30
HR800Y950T-CP / HR CP1000
Direction RD
Yield stress Rp0.2 (MPa) ≥ 800
Tensile strength Rm (MPa) ≥ 950
Min. A(%)
Type 1 Min. A50mm (%) 10
Type 2 Min. A80mm (%) 9
Type 3 Min. A50mm (%) 11
Min. BH2 MPa 30
HR780Y980T-CP-SF / HR CP1000SF
Direction TD
Yield stress Rp0.2 (MPa) 780 - 970
Tensile strength Rm (MPa) 980 - 1120
Min. A(%) 13
Type 1 Min. A50mm (%) 10
Type 2 Min. A80mm (%) 10
Type 3 Min. A50mm (%) 10
Min. BH2 MPa


A80mm %: Percentage elongation after fracture using a specimen with gauge length L0 = 80 mm (ISO 6892-1 type 2 (EN20x80))
A50mm %: Percentage elongation after fracture using a specimen with gauge length L0 = 50 mm (ISO 6892-1 type 1 (ASTM12.5x50) or type 3 (JIS25x50)
A%: Percentage elongation after fracture using a proportional specimen with L0 = 5.65 (So)1/2
Ag %: Percentage plastic extension at maximum force
BH2: Increase in yield strength between a reference condition after a 2% plastic pre-strain and the condition obtained after heat treatment (170°C-20minutes)

  • Microstructure of HR660Y760T-CP

  • Microstructure of HR800Y980T-CP

Chemical composition

Show all
ArcelorMittal name Generic name Max. C (%) Max. Si (%) Max. Mn (%) Max. P (%) Max. S (%) Al (%) Max. Cu (%) Max. B (%) Max. Ti + Nb (%) Max. Cr + Mo (%)
CR360Y590T-CP CP600 0.10 0.4 1.6
CR500Y780T-CP CP800Y500 0.18 1 2.5 0.05 0.01 0.015 - 1.0 0.2 0.005 0.15 1
CR570Y780T-CP CP800Y600 0.18 1 2.5 0.05 0.01 0.015 - 1.0 0.2 0.005 0.15 1
CR780Y980T-CP CP1000Y800 0.23 1 2.7 0.05 0.01 0.015 - 1.0 0.2 0.005 0.15 1
CR360Y590T-CP / CP600
Max. C (%) 0.10
Max. Si (%) 0.4
Max. Mn (%) 1.6
Max. P (%)
Max. S (%)
Al (%)
Max. Cu (%)
Max. B (%)
Max. Ti + Nb (%)
Max. Cr + Mo (%)
CR500Y780T-CP / CP800Y500
Max. C (%) 0.18
Max. Si (%) 1
Max. Mn (%) 2.5
Max. P (%) 0.05
Max. S (%) 0.01
Al (%) 0.015 - 1.0
Max. Cu (%) 0.2
Max. B (%) 0.005
Max. Ti + Nb (%) 0.15
Max. Cr + Mo (%) 1
CR570Y780T-CP / CP800Y600
Max. C (%) 0.18
Max. Si (%) 1
Max. Mn (%) 2.5
Max. P (%) 0.05
Max. S (%) 0.01
Al (%) 0.015 - 1.0
Max. Cu (%) 0.2
Max. B (%) 0.005
Max. Ti + Nb (%) 0.15
Max. Cr + Mo (%) 1
CR780Y980T-CP / CP1000Y800
Max. C (%) 0.23
Max. Si (%) 1
Max. Mn (%) 2.7
Max. P (%) 0.05
Max. S (%) 0.01
Al (%) 0.015 - 1.0
Max. Cu (%) 0.2
Max. B (%) 0.005
Max. Ti + Nb (%) 0.15
Max. Cr + Mo (%) 1
Show all
ArcelorMittal name Generic name Max. C (%) Max. Si (%) Max. Mn (%) Max. P (%) Max. S (%) Al (%) Max. Cu (%) Max. B (%) Max. Ti + Nb (%) Max. Cr + Mo (%)
HR550Y650T-CP HR550Y650T-CP 0.10 1.0 1.5 0.05 0.2 0.005 0.15 1.0
HR620Y750T-CP HR CP750 0.25 0.4 1.4
HR660Y760T-CP HR CP800 0.18 1.0 2.2 0.05 0.01 0.015 - 1.2 0.2 0.005 0.25 1
HR800Y950T-CP HR CP1000 0.14 0.3 1.7
HR550Y650T-CP / HR550Y650T-CP
Max. C (%) 0.10
Max. Si (%) 1.0
Max. Mn (%) 1.5
Max. P (%) 0.05
Max. S (%)
Al (%)
Max. Cu (%) 0.2
Max. B (%) 0.005
Max. Ti + Nb (%) 0.15
Max. Cr + Mo (%) 1.0
HR620Y750T-CP / HR CP750
Max. C (%) 0.25
Max. Si (%) 0.4
Max. Mn (%) 1.4
Max. P (%)
Max. S (%)
Al (%)
Max. Cu (%)
Max. B (%)
Max. Ti + Nb (%)
Max. Cr + Mo (%)
HR660Y760T-CP / HR CP800
Max. C (%) 0.18
Max. Si (%) 1.0
Max. Mn (%) 2.2
Max. P (%) 0.05
Max. S (%) 0.01
Al (%) 0.015 - 1.2
Max. Cu (%) 0.2
Max. B (%) 0.005
Max. Ti + Nb (%) 0.25
Max. Cr + Mo (%) 1
HR800Y950T-CP / HR CP1000
Max. C (%) 0.14
Max. Si (%) 0.3
Max. Mn (%) 1.7
Max. P (%)
Max. S (%)
Al (%)
Max. Cu (%)
Max. B (%)
Max. Ti + Nb (%)
Max. Cr + Mo (%)


Global availability


Under development     Customer trials     Commercial unexposed only     Commercial exposed and unexposed    

Show all
ArcelorMittal name Generic name Uncoated (-UNC) Extragal® (-GI) Zagnelis® Protect (-ZMP) Electrogalvanized (-EG) Jetgal® (-ZV)
CR360Y590T-CP CP600
CR500Y780T-CP CP800Y500
CR570Y780T-CP CP800Y600
CR780Y980T-CP CP1000Y800
HR550Y650T-CP HR550Y650T-CP
HR620Y750T-CP HR CP750
HR660Y760T-CP HR CP800
HR800Y950T-CP HR CP1000
HR780Y980T-CP-SF HR CP1000SF
Show all
ArcelorMittal name Generic name Uncoated (-UNC) Extragal® (-GI) Zagnelis® Protect (-ZMP) Electrogalvanized (-EG) Jetgal® (-ZV)
CR360Y590T-CP CP600
CR500Y780T-CP CP800Y500
CR570Y780T-CP CP800Y600
CR780Y980T-CP CP1000Y800
HR550Y650T-CP HR550Y650T-CP
HR620Y750T-CP HR CP750
HR660Y760T-CP HR CP800
HR800Y950T-CP HR CP1000
HR780Y980T-CP-SF HR CP1000SF
Show all
ArcelorMittal name Generic name Uncoated (-UNC) Extragal® (-GI) Galvannealed (-GA)
CR360Y590T-CP CP600
CR500Y780T-CP CP800Y500
CR570Y780T-CP CP800Y600
CR780Y980T-CP CP1000Y800
HR550Y650T-CP HR550Y650T-CP
HR620Y750T-CP HR CP750
HR660Y760T-CP HR CP800
HR800Y950T-CP HR CP1000
HR780Y980T-CP-SF HR CP1000SF
Show all
ArcelorMittal name Generic name Uncoated (-UNC) Extragal® (-GI)
CR360Y590T-CP CP600
CR500Y780T-CP CP800Y500
CR570Y780T-CP CP800Y600
CR780Y980T-CP CP1000Y800
HR550Y650T-CP HR550Y650T-CP
HR620Y750T-CP HR CP750
HR660Y760T-CP HR CP800
HR800Y950T-CP HR CP1000
HR780Y980T-CP-SF HR CP1000SF
Show all
ArcelorMittal name Generic name
CR360Y590T-CP CP600
CR500Y780T-CP CP800Y500
CR570Y780T-CP CP800Y600
CR780Y980T-CP CP1000Y800
HR550Y650T-CP HR550Y650T-CP
HR620Y750T-CP HR CP750
HR660Y760T-CP HR CP800
HR800Y950T-CP HR CP1000
HR780Y980T-CP-SF HR CP1000SF
Show all
ArcelorMittal name Generic name Uncoated (-UNC) Extragal® (-GI)
CR360Y590T-CP CP600
CR500Y780T-CP CP800Y500
CR570Y780T-CP CP800Y600
CR780Y980T-CP CP1000Y800
HR550Y650T-CP HR550Y650T-CP
HR620Y750T-CP HR CP750
HR660Y760T-CP HR CP800
HR800Y950T-CP HR CP1000
HR780Y980T-CP-SF HR CP1000SF

Under development
Customer trials
Commercial unexposed only
Commercial exposed and unexposed

CR360Y590T-CP / CP600
Coating Global view EUR NAM SAM RSA CHI
Uncoated (-UNC)
Extragal® (-GI)
Galvannealed (-GA)
Zagnelis® Protect (-ZMP)
Electrogalvanized (-EG)
Jetgal® (-ZV)
CR500Y780T-CP / CP800Y500
Coating Global view EUR NAM SAM RSA CHI
Uncoated (-UNC)
Extragal® (-GI)
Galvannealed (-GA)
Zagnelis® Protect (-ZMP)
Electrogalvanized (-EG)
Jetgal® (-ZV)
CR570Y780T-CP / CP800Y600
Coating Global view EUR NAM SAM RSA CHI
Uncoated (-UNC)
Extragal® (-GI)
Galvannealed (-GA)
Zagnelis® Protect (-ZMP)
Electrogalvanized (-EG)
Jetgal® (-ZV)
CR780Y980T-CP / CP1000Y800
Coating Global view EUR NAM SAM RSA CHI
Uncoated (-UNC)
Extragal® (-GI)
Galvannealed (-GA)
Zagnelis® Protect (-ZMP)
Electrogalvanized (-EG)
Jetgal® (-ZV)
HR550Y650T-CP / HR550Y650T-CP
Coating Global view EUR NAM SAM RSA CHI
Uncoated (-UNC)
Extragal® (-GI)
Galvannealed (-GA)
Zagnelis® Protect (-ZMP)
Electrogalvanized (-EG)
Jetgal® (-ZV)
HR620Y750T-CP / HR CP750
Coating Global view EUR NAM SAM RSA CHI
Uncoated (-UNC)
Extragal® (-GI)
Galvannealed (-GA)
Zagnelis® Protect (-ZMP)
Electrogalvanized (-EG)
Jetgal® (-ZV)
HR660Y760T-CP / HR CP800
Coating Global view EUR NAM SAM RSA CHI
Uncoated (-UNC)
Extragal® (-GI)
Galvannealed (-GA)
Zagnelis® Protect (-ZMP)
Electrogalvanized (-EG)
Jetgal® (-ZV)
HR800Y950T-CP / HR CP1000
Coating Global view EUR NAM SAM RSA CHI
Uncoated (-UNC)
Extragal® (-GI)
Galvannealed (-GA)
Zagnelis® Protect (-ZMP)
Electrogalvanized (-EG)
Jetgal® (-ZV)
HR780Y980T-CP-SF / HR CP1000SF
Coating Global view EUR NAM SAM RSA CHI
Uncoated (-UNC)
Extragal® (-GI)
Galvannealed (-GA)
Zagnelis® Protect (-ZMP)
Electrogalvanized (-EG)
Jetgal® (-ZV)

Please contact us for products under development.

Forming

Although their ultimate elongation is lower than that of DP and TRIP steels, Complex Phase steels have good formability for their high strength level.

Forming limit curves can be used to define maximum strains without necking for different deformation paths.

Forming limit curves for Complex Phase steels:

Cold rolled in 1mm thickness (ArcelorMittal model for Europe)

Cold rolled in 1mm thickness (Keeler model for North America)

Hot rolled in 2,5 mm thickness (ArcelorMittal model for Europe)

Hot rolled in 2,5 mm thickness (Keeler model for North America)

In addition, Complex Phase steels exhibit good roll-forming, bending and hole expansion behavior.

Welding

Resistance spot welding

The Complex Phase range of steels boasts very good resistance spot weldability. The welding range, determined in accordance with the ISO 18278-2 standard, is extensive. The table below shows examples (for information only) of spot welding specifications for Complex Phase matching joints, determined in accordance with the ISO 18278-2 standards.

Show all
ArcelorMittal name Thickness (mm) Nugget diameter (mm) Pure tensile (kN) Weld diameter (mm) Tensile-shear (kN)
CR360Y590T-CP 1.5 8.4 15.1 9 21.2
CR570Y780T-CP 1.5 8.7 13.2 7.6 24.2
CR780Y980T-CP 1.6 7.2 9.9 6.9 28.1
CR360Y590T-CP / CP600
Thickness (mm) 1.5
Max. Si (%) 0.4
Nugget diameter (mm) 8.4
Pure tensile (kN) 15.1
Weld diameter (mm) 9
Tensile-shear (kN) 21.2
CR570Y780T-CP / CP800Y600
Thickness (mm) 1.5
Max. Si (%) 0.1
Nugget diameter (mm) 8.7
Pure tensile (kN) 13.2
Weld diameter (mm) 7.6
Tensile-shear (kN) 24.2
CR780Y980T-CP / CP1000Y800
Thickness (mm) 1.6
Max. Si (%) 0.1
Nugget diameter (mm) 7.2
Pure tensile (kN) 9.9
Weld diameter (mm) 6.9
Tensile-shear (kN) 28.1
Show all
ArcelorMittal name Coating Thickness (mm) Nugget diameter (mm) Pure tensile (kN) Weld diameter (mm) Tensile-shear (kN)
HR660Y760T-CP 3 11.3 41.4 9.6 48.2
HR800Y950T-CP Extragal® 3 9.8 31.1 9.4 51.1
HR660Y760T-CP / HR CP800
Thickness (mm) 3
Max. Si (%) 1.0
Nugget diameter (mm) 11.3
Pure tensile (kN) 41.4
Weld diameter (mm) 9.6
Tensile-shear (kN) 48.2
HR800Y950T-CP / HR CP1000
Thickness (mm) 3
Max. Si (%) 0.3
Nugget diameter (mm) 9.8
Pure tensile (kN) 31.1
Weld diameter (mm) 9.4
Tensile-shear (kN) 51.1


Laser welding

Laser welding tests have revealed no particular difficulties.

ArcelorMittal can provide technical assistance in adjusting the welding parameters for all steels in the Complex Phase range.

Fatigue strength

Complex Phase steels exhibit good fatigue properties and can be used in suspension system parts such as suspension arms. The table below gives examples of Wöhler curves for a variety of Complex Phase steels. They are expressed as stress amplitude versus cycles to failure and are obtained with a stress ratio of R = 0.1 and repeated tensile loading.

The graph below shows the low cycle or EN curves for the same steels. These are expressed as strain amplitude versus number of reversals (one cycle equals two reversals). Other high and low cycle fatigue data are available upon request.

ArcelorMittal can provide a full database on the fatigue performance of Complex Phase steels.

Impact strength

As a result of their very high YS and UTS values, Complex Phase steels are particularly well suited for anti-intrusion parts.

Complex Phase steels have been characterized in the 3-point bending flex test using top hat cross-section specimens impacted at 30 kph. The tests showed very good behavior of these steels.

Weight-saving potential compared to CR340LA steel (reference)

Weight-saving potential compared to CR340LA steel (reference)

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