TSING SHAN STEEL INDUSTRIAL LIMITED
| Shape | Round |
| Technique | Hot Rolled |
| Surface Treatment | Bright |
| Specification | OD 6-300mm |
| Production Capacity | 50000kgs |
| Tensile Strength | 1105-1310 MPa |
| Yield Strength | 1000-1170 MPa |
| Elongation | 10-16% |
| Hardness | 28-44 HRC |
| Density | 7750 kg/m³ |
| Thermal Conductivity | 18.4-22.7 W/m.K |
| Specific Heat | 460 J/kg.K |
| Electrical Resistivity | 800 nΩ.m |
| Max Temperature | 572°F (300°C) |
| Coefficient of Thermal Expansion | 10.8-11.6 µm/m/°C |
| Certification | ISO, AISI, ASTM, EN, DIN, JIS |
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Product Specification
| Shape | Round | Technique | Hot Rolled |
| Surface Treatment | Bright | Specification | OD 6-300mm |
| Production Capacity | 50000kgs | Tensile Strength | 1105-1310 MPa |
| Yield Strength | 1000-1170 MPa | Elongation | 10-16% |
| Hardness | 28-44 HRC | Density | 7750 kg/m³ |
| Thermal Conductivity | 18.4-22.7 W/m.K | Specific Heat | 460 J/kg.K |
| Electrical Resistivity | 800 nΩ.m | Max Temperature | 572°F (300°C) |
| Coefficient of Thermal Expansion | 10.8-11.6 µm/m/°C | Certification | ISO, AISI, ASTM, EN, DIN, JIS |
| High Light | Precipitation Hardening 17-4PH Round Bar ，High Strength 17-4PH Stainless Steel Round Bar ，Corrosion Resistant Precipitation Hardening Stainless Steel Bar | ||
17-4 Precipitation Hardening (Type 630) is a chromium-copper precipitation hardening stainless steel designed for applications requiring high strength and moderate corrosion resistance. This alloy maintains high strength up to approximately 600°F (316°C).
Alloy 17-4 PH is a precipitation hardening martensitic stainless steel with copper and niobium/columbium additions. This grade combines high strength, hardness (up to 572°F / 300°C), and excellent corrosion resistance. Mechanical properties can be optimized through heat treatment, achieving very high yield strength up to 1100-1300 MPa (160-190 ksi).
The alloy should not be used above 572°F (300°C) or at very low temperatures. It provides adequate resistance to atmospheric corrosion and diluted acids or salts, with corrosion resistance equivalent to Alloy 304 or 430.
Alloy 17-4 PH withstands corrosive attacks better than standard hardenable stainless steels and is comparable to Alloy 304 in most media. For stress corrosion cracking risks, higher aging temperatures above 1022°F (550°C), preferably 1094°F (590°C), should be selected.
The alloy may experience crevice or pitting attack in stagnant seawater but provides excellent corrosion resistance in chemical, petroleum, paper, dairy, and food processing industries (equivalent to 304L grade).
| Grade | C | Mn | Si | P | S | Cr | Ni | Cu | Nb+Ta |
|---|---|---|---|---|---|---|---|---|---|
| 630 | 0.07 max | 1.0 max | 1.0 max | 0.04 max | 0.030 max | 15.0-17.5 | 3.0-5.0 | 3.0-5.0 | 0.15-0.45 |
| Condition | Tensile Strength (MPa) | Yield Strength 0.2% Proof (MPa) | Elongation (% in 50mm) | Hardness Rockwell C (HR C) | Hardness 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 |
| Density (kg/m³) | 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) |
|---|---|---|---|---|
| 7750 | 10.8 (0-100°C) 11.6 (0-315°C) |
18.4 (At 100°C) 22.7 (At 500°C) |
460 | 800 |
| Grade | Reasons for choosing 17/4PH (630) |
|---|---|
| 431 | 431 has higher toughness than 17/4PH. Better availability in some sizes. |
| 416 | Free-machining martensitic stainless steel - better for repetition machining. Lower cost. |
| 316 | Higher corrosion resistance to resist more severe environments, but with much lower strength than 17/4PH. |
| 2205 | Much better corrosion resistance than 17/4PH, with lower strength (but not as low as 316). |
Solution treatment (Condition A) - Grade 630 stainless steels are heated at 1040°C for 0.5 h, then air-cooled to 30°C. Small sections can be oil quenched.
Hardening - Grade 630 stainless steels are age-hardened at low temperatures to achieve required mechanical properties. During the process, superficial discoloration occurs followed by shrinkage at 0.10% for condition H1150, and 0.05% for condition H900.
| Condition | Hardening Temp (°C) | Hardening Time (h) | Typical Hardness Rockwell C | Tensile Strength (MPa) |
|---|---|---|---|---|
| A | Ann | - | 36 | 1100 |
| H900 | 482 | 1 | 44 | - |
| H925 | 496 | 4 | 42 | 1170-1320 |
| H1025 | 552 | 4 | 38 | 1070-1220 |
| H1075 | 580 | 4 | 36 | 1000-1150 |
| H1100 | 593 | 4 | 35 | 970-1120 |
| H1150 | 621 | 4 | 33 | 930-1080 |
Company Details
Business Type:
Manufacturer
Year Established:
2012
Total Annual:
500,000,000-800,000,000
Employee Number:
100~200
Ecer Certification：
Verified Supplier
Company Overview ： The company has an indoor warehouse of 5000 square meters and an open warehouse of 4000 square meters, which can fully meet the temporary turnover and phased storage of customers' steel pipe reservation. The subordinate processing plant has 6 sets of medium frequency h... Company Overview ： The company has an indoor warehouse of 5000 square meters and an open warehouse of 4000 square meters, which can fully meet the temporary turnover and phased storage of customers' steel pipe reservation. The subordinate processing plant has 6 sets of medium frequency h...
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