What is 630 stainless steel equivalent to?
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The corresponding domestic grade of Grade 630 stainless steel is 0Cr17Ni4Cu4Nb, while its Japanese standard designation is SUS630. Additionally, 630 stainless steel is also known as 17-4PH stainless steel.
GNEE supplies 630 stainless steel bars, which have been widely used in valves, shafts, the chemical fiber industry, and high-strength components that require a certain level of corrosion resistance.
GNEE will introduce the characteristics of Stainless Steel Alloy 630 bar from several aspects, helping you gain a clear understanding for your project.
Chemical Composition of SUS630 Stainless Steel Bar
| standard |
|
c |
Si |
Mn |
P |
S |
Ni |
Cr |
Mo |
Cu |
Nb |
| GB |
0Cr17Ni4Cu4Nb |
≤0.07 |
≤1.00 |
≤1.00 |
≤0.04 |
≤0.030 |
3.00-5.00 |
15.5-17.5 |
- |
3.00-5.00 |
0.15-0.45 |
|
ASTM |
ASTMS17400 |
≤0.07 |
≤1.00 |
≤1.00 |
≤0.04 |
≤0.030 |
3.00-5.00 |
15.5-17.5 |
- |
3.00-5.00 |
0.15-0.45 |
|
JIS |
SUS630 |
≤0.07 |
≤1.00 |
≤1.00 |
≤0.04 |
≤0.030 |
3.00-5.00 |
15.5-17.5 |
- |
3.00-5.00 |
0.15-0.45 |
|
EN |
X5CrNiCuNb16-4 |
≤0.08 |
≤1.00 |
≤1.00 |
≤0.045 |
≤0.030 |
3.0-5.0 |
15.0-17.0 |
- |
3.0-5.0 |
0.15-0.45 |
SUS630 alloy is a precipitated, water-quenched, martensitic stainless steel, and this grade has high strength, hardness and corrosion resistance. After heat treatment, the mechanical properties of the product are more perfect, and the compressive strength can reach up to 1100-1300 mpa (160-190 ksi). This grade cannot be used at temperatures above 300℃ (570F) or very low temperatures. It has good corrosion resistance to the atmosphere and dilute acids or salts. Its corrosion resistance is the same as 304 and 430.
Mechanical Properties Of 630 Stainless bar
|
Condition |
Tensile Strength (MPa) |
Yield Strength 0.2% Proof (MPa) |
Elongation (% in 50mm) |
Hardness |
|
|
Rockwell C (HR C) |
Brinell (HB) |
||||
|
Solution Treated |
1105 typ |
1000 typ |
15 typ |
38 max |
363 max |
|
Condition 900 |
1310 min |
1170 min |
10 min |
40 min |
388 min |
|
Condition 1150 |
930 min |
724 min |
16 min |
28 min |
277 min |
17-4 PH (AISI 630) stainless steel heat treatment process
(1) Solution treatment at 1020-1060℃ and rapid cooling;
(2) Aging at 480℃, after solution treatment, air cooling at 470-490℃;
(3) Aging at 550℃, after solution treatment, air cooling at 540-560℃;
(4) Aging at 580℃, after solution treatment, air cooling at 570-590℃;
(5) Aging at 620℃, after solution treatment, air cooling at 610-630℃. Metallographic structure: The structure is characterized by precipitation hardening.
Delivery status
Generally, the product is delivered in the heat-treated state. The type of heat treatment is specified in the contract. If not specified, the product is delivered without heat treatment.
