17-4PH alloy is composed of copper, niobium precipitation / columbium formed, hardened, martensitic stainless steel properties after heat treatment, the mechanical properties of the product more perfect, can reach up to 1100-1300 mpa (160-190 ksi) compressive strength . This level can not be used above 300o C (572o F) or under very low temperatures, its atmosphere and dilute acid or salt has good corrosion resistance, corrosion resistance and its 304 and 430 the same. 17-4PH is a martensitic precipitation hardening stainless steel .17-4PH performance characteristics are easy to adjust the intensity level can be adjusted by changes in heat treatment process. Martensite phase transition and the formation of precipitation hardening aging treatment phase is the main means of strengthening, 17-4PH attenuation performance, strong anti-corrosion and anti-fatigue properties of water droplets. 2 applications offshore platforms, helicopter deck, other platforms pulp and paper industry food industry Aerospace (turbine blades) mechanical parts 17-4PH 17-4PH alloy barrels of nuclear waste precipitation hardening, martensitic stainless steel. 17-4PH alloy is a precipitation of copper, niobium / columbium formed, hardened, martensitic stainless steel. This level has a high strength, hardness (up to 300o C / 572o F) and anti-corrosion properties. After heat treatment, the mechanical properties of the product more perfect, can reach up to 1100-1300 mpa (160-190 ksi) of compressive strength. This level can not be used above 300o C (572o F) or under very low temperatures, its atmosphere and dilute acid or salt has good corrosion resistance, corrosion resistance and its 304 and 430 the same. 3 Chemical Composition "Chinese brands 0Cr17Ni4Cu4Nb 05Cr17Ni4Cu4Nb C: ≤0.07 Si: ≤1.00 Mn: ≤1.00 P: ≤0.035 S: ≤0.030 Ni: 3.00-5.00 Cr: 15.0-17.5 Mo: - Cu: 3.00-5.00 Nb: 0.15- 0.45 Other: - US ASTMS17400, AISI630, UNS630 chemical composition of C: ≤0.07 Si: ≤1.00 Mn: ≤1.00 P: ≤0.040 S: ≤0.030 Ni: 3.00-5.00 Cr: 15.0-17.5 Mo: - Cu: 3.00-5.00 Nb: 0.15-0.45 Other: - Japan SUS630 chemical composition of C: ≤0.07 Si: ≤1.00 Mn: ≤1.00 P: ≤0.040 S: ≤0.030 Ni: 3.00-5.00 Cr: 15.0-17.5 Mo: - Cu: 3.00-5.00 Nb + Tao: 0.15-0.45 Other: - Europe X5CrNiCuNb16-4 Chemical Composition C: ≤0.07 Si: ≤1.00 Mn: ≤1.00 P: ≤0.040 S: ≤0.030 Ni: 3.00-5.00 Cr: 15.0-17.0 Mo: - Cu : 3.00-5.00 Nb + Tao: 0.15-0.45 Other: - 4 mechanical properties of tensile strength σb (MPa): 480 ℃ aging, ≥1310; 550 ℃ aging, ≥1060; 580 ℃ aging, ≥1000; 620 ℃ aging, ≥930 Conditions 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 section shrinkage ψ (%): 480 ℃ aging, ≥40; 550 ℃ aging, ≥45; 580 ℃ aging, ≥45; 620 ℃ aging, ≥50 Hardness: solution ≤363HB and ≤38HRC; 480 ℃ aging, ≥375HB and ≥40HRC; 550 ℃ aging, ≥331HB and ≥35HRC; 580 ℃ aging, ≥302HB and ≥31HRC; 620 ℃ aging, ≥277HB and ≥28HRC Density: 7.80g / cm3 5 specification heat treatment specifications: 1) solid solution 1020 ~ 1060 ℃ rapid cooling 2) 480 ℃ aging after solution treatment, 470 ~ 490 ℃ air-cooled 3) 550 ℃ aging, after solution treatment, 540 ~ 560 ℃ air-cooled 4) 580 ℃ aging after solution treatment, 570 ~ 590 ℃ air-cooled 5) 620 ℃ aging after solution treatment, 610 ~ 630 ℃ air cooling. Microstructure: Organizing for the precipitation hardening. Chuan sharp metal: Guangdong Dongguan Changan Shenzhen, Huizhou, Heyuan stainless excellence Chuan sharp metal: Taiyuan Huangyan Wuhu Hangzhou Lishui stainless excellence Chuan sharp metal: Dezhou, Dongying, Jinan, Laiwu Liaocheng stainless excellence Chuan sharp metal: Hanzhong, Shaanxi Xi'an Yingkou Shenyang Yangzhou stainless steel excellence Chuan sharp metal: Hebi Luoyang Xinxiang Xinyang Yancheng Laiwu steel excellence Chuan sharp metal: Chuzhou, Anhui Wuhu Huzhou, Ningbo, Weihai stainless excellence Chuan sharp metal: Ganzhou 饶宜春 Wenzhou Changzhou stainless excellence Chuan sharp metal on Nanchang: Changzhou, Jiangsu Huaian, Nanjing, Nantong Excellent quality stainless steel sunshine sharp metal Chuan: Suzhou, Taicang, Changshu, Wujiang River in Luoyang Yantai excellence sharp stainless steel metal: Jiangyin Yixing, Wuxi, Xuzhou, Yancheng Jiaxing excellence Chuan sharp stainless steel metal: Jiang Yin Wujiang, Wuxi, Hangzhou, Huzhou Suqian stainless excellence Chuan sharp metal: Jinhua, Yiwu Zibo Nanchang, Qingdao, Dongying stainless excellence Chuan sharp metal: Yuyao Yixing, Shanghai, Xi'an, Taizhou Chuan sharp metal stainless excellence: Yuyao, Shaoxing, Taizhou Huangyan Changshu Lishui River excellence sharp stainless steel metal: Hefei, Nanjing, Xiamen, Wenzhou Yueqing Ryan excellence Chuan sharp stainless steel metal: Shandong Dongying, Binzhou, Dezhou, Jinan Jining stainless excellence Chuan sharp metal: Weihai, Yantai, Zibo, Weifang, Qingdao Jiaxing excellent quality stainless steel sharp metal Chuan: Rudong, Rugao, Tongzhou Suzhou, Kunshan, Changshu stainless excellence Chuan sharp metal: Jing Jiang Taixing Wuxi, Xuzhou, Jiangyin Yixing sharp stainless excellence River Metal: Yizheng Gaoyou jiangdu Danyang, Zhenjiang Jurong River excellence sharp stainless steel metal: Jiangyan rooftop Wenling Yong Kang, Dongying, Yantai stainless excellence ------------------------ ------