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E: enquiry@qilumetal.com
E: enquiry@qilumetal.com
No. 18 Xiangfu Middle Road,Yuhua District, Changsha City
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630 stainless steel is a type of precipitation-hardening martensitic stainless steel, known for its high strength, excellent corrosion resistance, and good mechanical properties. You can find its equivalent in different steel standards, such as: X5CrNiCuNb16-4/1.4542 from Europe standard EN 10088-3, 0Cr17Ni4Cu4Nb/05Cr17Ni4Cu4Nb from China standard GB/T 1220, SUS630 from Japan standard JIS G4303, 09X17H7Ю1 from Russia standard GOST 5632-72.
630 stainless steel offers exceptional hardness after heat treatment, good weldability, and resistance to stress corrosion cracking, making it suitable for high-performance applications.
1: Steel equivalent
Country | USA | EN | China | Japan | Russia |
Standard | ASTM A693 | EN10088-3 | GB/T1220 | JIS G4303 | GOST 5632-76 |
Grade | 630/17-4PH | X5CrNiCuNb16-4/1.4542 | 05Cr17Ni4Cu4Nb | SUS630 | 09X17H7Ю1 |
2: Chemical composition
Grade | C | Si | Mn | P | S | Cr | Ni | Cu | Nb |
630 | 0.07Max | 1.0Max | 1.0Max | 0.040Max | 0.030Max | 15-17.5 | 3-5 | 3-5 | 0.15-0.45 |
X5CrNiCuNb16-4/1.4542 | 0.07Max | 0.7Max | 1.5Max | 0.040Max | 0.030Max | 15-17 | 3-5 | 3-5 | |
05Cr17Ni4Cu4Nb | 0.07Max | 1.0Max | 1.0Max | 0.040Max | 0.030Max | 15-17.5 | 3-5 | 3-5 | |
SUS630 | 0.07Max | 1.0Max | 1.0Max | 0.040Max | 0.030Max | 15-17.5 | 3-5 | 3-5 | |
09X17H7Ю1 | 0.09Max | 0.8Max | 0.8Max | 0.035Max | 0.025Max | 16.5-18 | 6.5-7.5 | / |
3: Mechanical properties
Mechanical properties for 0Cr17Ni4Cu4Nb/05Cr17Ni4Cu4Nb from standard GB/T1220 and SUS630 from JIS G4303.
Grade | Heat treatment | Tensile strength | Yield strength | Alongation | Area of reduction | Hardness | |
0Cr17Ni4Cu4Nb | Solution Annealing | / | / | / | / | HBW363 Max | |
Age Hardening | 480℃ | 1310Mpa Min | 1180Mpa Min | 10% Min | 40% Min | HBW375 Min | |
550℃ | 1070Mpa Min | 1000Mpa Min | 12% Min | 45% Min | HBW331 Min | ||
580℃ | 1000Mpa Min | 865Mpa Min | 13% Min | 45% Min | HBW302 Min | ||
620℃ | 930Mpa Min | 725Mpa Min | 16% Min | 50% Min | HBW277 Min | ||
SUS630 | Solution Annealing | / | / | / | / | HBW363 Max | |
H900 | 1310Mpa Min | 1175Mpa Min | 10% Min | 40% Min | HBW375 Min | ||
H1025 | 1070Mpa Min | 1000Mpa Min | 12% Min | 45% Min | HBW331 Min | ||
H1075 | 1000Mpa Min | 860Mpa Min | 13% Min | 45% Min | HBW302 Min | ||
H1150 | 930Mpa Min | 725Mpa Min | 16% Min | 50% Min | HBW277 Min | ||
Mechanical properties for X5CrNiCuNb16-4/1.4542 from standard EN10088-3.
Steel grade | Thickness | HT condition | Tensile strength | Yield strength | Alongation | Impact value at RT/J | Hardness /HBW | ||
L | Tr | L | Tr | ||||||
X5CrNiCuNb16-4/1.4542 | 100mm Max | AT | 1200Mpa Max | / | / | / | / | / | 360Max |
P800 | 800-950Mpa | 520Mpa Min | 18% Min | / | 75J Min | / | / | ||
P930 | 930-1100Mpa | 720Mpa Min | 16% Min | / | 40J Min | / | / | ||
P960 | 960-1160Mpa | 790Mpa Min | 12% Min | / | / | / | / | ||
P1070 | 1070-1270Mpa | 1000Mpa Min | 10% Min | / | / | / | / | ||
AT=Solution annealed; P= Precipitation hardened
Minimum values for the 0.2% proof strength of precipitation hardening steels at elevated temperatures according to standard EN10088-3
Steel garde | HT condition | Minimum 0.2% proof strength at a temperature of: | ||||
100℃ | 150℃ | 200℃ | 250℃ | 300℃ | ||
X5CrNiCuNb16-4/1.4542 | Mpa or N/mm2 | |||||
P800 | 500 | 490 | 480 | 470 | 460 | |
P930 | 680 | 660 | 640 | 620 | 600 | |
P960 | 730 | 710 | 690 | 670 | 650 | |
P1070 | 880 | 830 | 800 | 770 | 750 | |
P= Precipitation hardened
4: Supply size & Tolerance & Stock size
Product type | Size range | Length |
Hot rolled bar | Φ10-Φ130mm | 5000-7000mm |
Hot forged bar | Φ140-Φ600mm | 2000-5800mm |
Hot rolled plate/sheet | T:2-60mm; W:310-810mm | 6000-12000mm |
Hot forged plate | T:70-250mm; W:310-810mm | 2000-5800mm |
Hot Forged block | T: 260-500mm; W: 300-1000mm | 2000-5800mm |
Surface Finish | Turned | Milled | Grinding(Best) | Polished(Best) | Peeled(Best) | Black Forged | Black Rolled |
Tolerance | +0/+3mm | +0/+3mm | +0/+0.05mm | +0/+0.05mm | +0/+0.1mm | +0/+5mm | +0/+1mm |
Straighness | 1mm/1000mm max. | 3mm/1000mm max. | |||||
Qilu steel stock hot rolled bar and forged bars more than ten thousands tons every month, below our our stock size.
1): Stock diameter for hot rolled bar
10 | 12 | 15 | 18 | 20 | 22 | 25 | 28 | 30 | 32 | 35 | 38 | 40 | 45 | 50 |
55 | 60 | 65 | 70 | 75 | 80 | 85 | 90 | 95 | 100 | 105 | 110 | 120 | 130 | 140 |
150 | 160 | 170 | 180 | 190 |
2) : Stock diameter for hot forged bar
200 | 210 | 220 | 230 | 240 | 250 | 260 | 270 | 280 | 290 |
300 | 310 | 320 | 330 | 340 | 350 | 360 | 370 | 380 | 390 |
400 |
Since the stocks change everyday, if you want to know our stock available information, please contact our salesman.
5: Ultrasonic Test
EN10228-3 class III or Sep 1921-84 D/D
6：Steel making & Forging processing
1): Steel making process:
EF+LF+VD
EAF+LF+VD
EF+LF+VD+ESR
EAF+LF+VD+ESR
2): Forging processing:
Hot forging temperature: 900-1150℃
Cooling in the furnace or in the air
7: Heat treatment
Solution Annealing
1) Heat 630 steel to 1020-1060℃ in the furnace
Quick cool in the air/water
2) Precipitation hardening to 480℃
After solution treatment, heat to 470-490℃ in the furnace
Cooling in the air
3) Precipitation hardening to 550℃
After solution treatment, heat to 540-560℃ in the furnace
Cooling in the air
4) Precipitation hardening to 580℃
After solution treatment, heat to 570-590℃ in the furnace
Cooling in the air
5) Precipitation hardening to 620℃
After solution treatment, heat to 610-630℃ in the furnace
Cooling in the air
8：Application
630 stainless steel is a martensitic precipitation hardening stainless steel, both high strength, good corrosion resistance and excellent machinability. Its main application areas are as follows:
1. Aerospace
1) Aircraft components: landing gear parts, engine fasteners, turbine blades.
2) Aerospace equipment: rocket engine shells, satellite structure.
2. Oil and energy industry
1) Oil/gas equipment: valves, pump shafts, downhole tools.
2) Nuclear power components: reactor internal fasteners, control rod drive mechanism.
3. Chemical and Marine Engineering
1) Chemical equipment: acid-resistant pumps, agitator shafts.
2) Marine environment: ship shaft system, desalination equipment.
4. Machinery Manufacturing and Tools
1) Highly stressed parts: gears, bearings, mold inserts.
2) Medical equipment: surgical tools, orthopedic implants.
630 stainless steel is a type of precipitation-hardening martensitic stainless steel, known for its high strength, excellent corrosion resistance, and good mechanical properties. You can find its equivalent in different steel standards, such as: X5CrNiCuNb16-4/1.4542 from Europe standard EN 10088-3, 0Cr17Ni4Cu4Nb/05Cr17Ni4Cu4Nb from China standard GB/T 1220, SUS630 from Japan standard JIS G4303, 09X17H7Ю1 from Russia standard GOST 5632-72.
630 stainless steel offers exceptional hardness after heat treatment, good weldability, and resistance to stress corrosion cracking, making it suitable for high-performance applications.
1: Steel equivalent
Country | USA | EN | China | Japan | Russia |
Standard | ASTM A693 | EN10088-3 | GB/T1220 | JIS G4303 | GOST 5632-76 |
Grade | 630/17-4PH | X5CrNiCuNb16-4/1.4542 | 05Cr17Ni4Cu4Nb | SUS630 | 09X17H7Ю1 |
2: Chemical composition
Grade | C | Si | Mn | P | S | Cr | Ni | Cu | Nb |
630 | 0.07Max | 1.0Max | 1.0Max | 0.040Max | 0.030Max | 15-17.5 | 3-5 | 3-5 | 0.15-0.45 |
X5CrNiCuNb16-4/1.4542 | 0.07Max | 0.7Max | 1.5Max | 0.040Max | 0.030Max | 15-17 | 3-5 | 3-5 | |
05Cr17Ni4Cu4Nb | 0.07Max | 1.0Max | 1.0Max | 0.040Max | 0.030Max | 15-17.5 | 3-5 | 3-5 | |
SUS630 | 0.07Max | 1.0Max | 1.0Max | 0.040Max | 0.030Max | 15-17.5 | 3-5 | 3-5 | |
09X17H7Ю1 | 0.09Max | 0.8Max | 0.8Max | 0.035Max | 0.025Max | 16.5-18 | 6.5-7.5 | / |
3: Mechanical properties
Mechanical properties for 0Cr17Ni4Cu4Nb/05Cr17Ni4Cu4Nb from standard GB/T1220 and SUS630 from JIS G4303.
Grade | Heat treatment | Tensile strength | Yield strength | Alongation | Area of reduction | Hardness | |
0Cr17Ni4Cu4Nb | Solution Annealing | / | / | / | / | HBW363 Max | |
Age Hardening | 480℃ | 1310Mpa Min | 1180Mpa Min | 10% Min | 40% Min | HBW375 Min | |
550℃ | 1070Mpa Min | 1000Mpa Min | 12% Min | 45% Min | HBW331 Min | ||
580℃ | 1000Mpa Min | 865Mpa Min | 13% Min | 45% Min | HBW302 Min | ||
620℃ | 930Mpa Min | 725Mpa Min | 16% Min | 50% Min | HBW277 Min | ||
SUS630 | Solution Annealing | / | / | / | / | HBW363 Max | |
H900 | 1310Mpa Min | 1175Mpa Min | 10% Min | 40% Min | HBW375 Min | ||
H1025 | 1070Mpa Min | 1000Mpa Min | 12% Min | 45% Min | HBW331 Min | ||
H1075 | 1000Mpa Min | 860Mpa Min | 13% Min | 45% Min | HBW302 Min | ||
H1150 | 930Mpa Min | 725Mpa Min | 16% Min | 50% Min | HBW277 Min | ||
Mechanical properties for X5CrNiCuNb16-4/1.4542 from standard EN10088-3.
Steel grade | Thickness | HT condition | Tensile strength | Yield strength | Alongation | Impact value at RT/J | Hardness /HBW | ||
L | Tr | L | Tr | ||||||
X5CrNiCuNb16-4/1.4542 | 100mm Max | AT | 1200Mpa Max | / | / | / | / | / | 360Max |
P800 | 800-950Mpa | 520Mpa Min | 18% Min | / | 75J Min | / | / | ||
P930 | 930-1100Mpa | 720Mpa Min | 16% Min | / | 40J Min | / | / | ||
P960 | 960-1160Mpa | 790Mpa Min | 12% Min | / | / | / | / | ||
P1070 | 1070-1270Mpa | 1000Mpa Min | 10% Min | / | / | / | / | ||
AT=Solution annealed; P= Precipitation hardened
Minimum values for the 0.2% proof strength of precipitation hardening steels at elevated temperatures according to standard EN10088-3
Steel garde | HT condition | Minimum 0.2% proof strength at a temperature of: | ||||
100℃ | 150℃ | 200℃ | 250℃ | 300℃ | ||
X5CrNiCuNb16-4/1.4542 | Mpa or N/mm2 | |||||
P800 | 500 | 490 | 480 | 470 | 460 | |
P930 | 680 | 660 | 640 | 620 | 600 | |
P960 | 730 | 710 | 690 | 670 | 650 | |
P1070 | 880 | 830 | 800 | 770 | 750 | |
P= Precipitation hardened
4: Supply size & Tolerance & Stock size
Product type | Size range | Length |
Hot rolled bar | Φ10-Φ130mm | 5000-7000mm |
Hot forged bar | Φ140-Φ600mm | 2000-5800mm |
Hot rolled plate/sheet | T:2-60mm; W:310-810mm | 6000-12000mm |
Hot forged plate | T:70-250mm; W:310-810mm | 2000-5800mm |
Hot Forged block | T: 260-500mm; W: 300-1000mm | 2000-5800mm |
Surface Finish | Turned | Milled | Grinding(Best) | Polished(Best) | Peeled(Best) | Black Forged | Black Rolled |
Tolerance | +0/+3mm | +0/+3mm | +0/+0.05mm | +0/+0.05mm | +0/+0.1mm | +0/+5mm | +0/+1mm |
Straighness | 1mm/1000mm max. | 3mm/1000mm max. | |||||
Qilu steel stock hot rolled bar and forged bars more than ten thousands tons every month, below our our stock size.
1): Stock diameter for hot rolled bar
10 | 12 | 15 | 18 | 20 | 22 | 25 | 28 | 30 | 32 | 35 | 38 | 40 | 45 | 50 |
55 | 60 | 65 | 70 | 75 | 80 | 85 | 90 | 95 | 100 | 105 | 110 | 120 | 130 | 140 |
150 | 160 | 170 | 180 | 190 |
2) : Stock diameter for hot forged bar
200 | 210 | 220 | 230 | 240 | 250 | 260 | 270 | 280 | 290 |
300 | 310 | 320 | 330 | 340 | 350 | 360 | 370 | 380 | 390 |
400 |
Since the stocks change everyday, if you want to know our stock available information, please contact our salesman.
5: Ultrasonic Test
EN10228-3 class III or Sep 1921-84 D/D
6：Steel making & Forging processing
1): Steel making process:
EF+LF+VD
EAF+LF+VD
EF+LF+VD+ESR
EAF+LF+VD+ESR
2): Forging processing:
Hot forging temperature: 900-1150℃
Cooling in the furnace or in the air
7: Heat treatment
Solution Annealing
1) Heat 630 steel to 1020-1060℃ in the furnace
Quick cool in the air/water
2) Precipitation hardening to 480℃
After solution treatment, heat to 470-490℃ in the furnace
Cooling in the air
3) Precipitation hardening to 550℃
After solution treatment, heat to 540-560℃ in the furnace
Cooling in the air
4) Precipitation hardening to 580℃
After solution treatment, heat to 570-590℃ in the furnace
Cooling in the air
5) Precipitation hardening to 620℃
After solution treatment, heat to 610-630℃ in the furnace
Cooling in the air
8：Application
630 stainless steel is a martensitic precipitation hardening stainless steel, both high strength, good corrosion resistance and excellent machinability. Its main application areas are as follows:
1. Aerospace
1) Aircraft components: landing gear parts, engine fasteners, turbine blades.
2) Aerospace equipment: rocket engine shells, satellite structure.
2. Oil and energy industry
1) Oil/gas equipment: valves, pump shafts, downhole tools.
2) Nuclear power components: reactor internal fasteners, control rod drive mechanism.
3. Chemical and Marine Engineering
1) Chemical equipment: acid-resistant pumps, agitator shafts.
2) Marine environment: ship shaft system, desalination equipment.
4. Machinery Manufacturing and Tools
1) Highly stressed parts: gears, bearings, mold inserts.
2) Medical equipment: surgical tools, orthopedic implants.
