630 (17-4) Precipitation Hardening Stainless Steel is martensite precipitation-hardened stainless steel.630 stainless steel performance characteristic is easy to adjust the strength level, can be adjusted by changes in heat treatment process.
Martensite phase transformation and aging treatment of metal forming precipitation hardening phase is the main reinforcement method, 630 stainless steel attenuation performance is good, strong corrosion fatigue resistance and water resistance.
630 Stainless Steel Chemical Composition | ||||||||
C | Si | Mn | P | S | Ni | Cr | Cu | Nb |
≤0.07 | ≤1.00 | ≤1.00 | ≤0.035 | ≤0.030 | 3.00-5.00 | 15.5-17.5 | 3.00-5.00 | 0.15-0.45 |
630 stainless steel is precipitated, hardened, martensitic stainless steel.630 stainless steel is composed of copper, niobium/columbium deposit, hardening, martensitic stainless steel. This level is of high strength and hardness (up to 300º).C / 572 & ordm; F) and anti-corrosion properties.
630 Stainless Steel Characteristics:
630 stainless steel is precipitate, quench water, martensite stainless steel, and this grade has high strength, hardness and corrosion resistance characteristics.
After heat treatment, the mechanical properties of the products are improved, and the pressure strength can reach up to 1100-1300 mpa (160-190 ksi).This level cannot be used for higher than 300 ℃ (570 f) or very low temperatures, in the atmosphere and dilute acid or its salt has good corrosion resistant ability of metal. It has the corrosion resistance of 304 and 430.
The delivery status: generally delivered in heat treatment state, and its heat treatment type is indicated in the contract; Unmarked, delivery in non-heat treatment state.
630 Stainless Steel Mechanical Performance:
Strength of extension σb (MPa)：480℃ aging,≥1310; 550℃ aging,≥1060; 580℃aging,≥1000; 620℃ aging,≥930
Offset yield strength σ0.2 (MPa)：480℃ aging,≥1180;550℃ aging,≥1000;580℃ aging,≥865;620℃ aging,≥725
Elongation δ5 (%)：480℃ aging,≥10;550℃ aging,≥12;580℃ aging,≥13;620℃ aging,≥16
Percentage reduction of areaψ (%)：480℃ aging,≥40;550℃ aging,≥45;580℃ aging,≥45;620℃ aging,≥50
Hardness: solid solution,≤363HB和≤38HRC;480℃ aging,≥375HB和≥40HRC; 550℃ aging,≥331HB和≥35HRC;580℃ aging,≥302HB和≥31HRC;620℃ aging,≥277HB和≥28HRC
Technology for heating processing:
1)solid solution 1020～1060℃ fast cooling;
2)480℃ aging, after solution treatment,470～490℃ air cooling;
3)550℃ aging, after solution treatment, 540～560℃ air cooling;
4)580℃ aging, after solution treatment,570～590℃ air cooling;
5)620℃aging, after solution treatment,610～630℃ air cooling。
Metallographic structure: the tissue characteristic is precipitation hardening type.
630 Stainless Steel Application:
offshore platform, helicopter deck, other platforms
food industry
pulp and paper industry
aerospace (turbine blades)
mechanical parts
nuclear waste barrels
Spot delivery, including delivering small batches of goods
Provide wide-range and complete materials series products
Cutting plates, including complex shapes of materials and special processing and disposal
Cutting bars and strips
Our application technology expert provide the best material and recommendation
One-stop service
