超级奥氏体不锈钢无缝钢管
Super austenitic stainless steel tube
· 可供规格size： 热挤压管hot extrusion tube：外径OD：48~325mm；壁厚WT：4~40mm；
冷加工管cold rolling tube：外径OD：5.8~273mm；壁厚WT：0.3~35mm。
· 订货标准standard：ASTM A312/ASME SB677，企业标准，技术协议
· 交货状态condition：热挤压hot extrusion；冷加工cold rolling；热处理heat treatment
主要钢种（牌号）的化学成分和性能chemical composition and performance of main steel grade(trademark)
ASTM UNS | 牌号 grade | 化学成分chemical composition | ||||||||||
C | Si | Mn | P | S | Ni | Cr | Mo | Cu | N | Fe | ||
WT% | ||||||||||||
N08904 | 904L | ≤0.020 | ≤1.00 | ≤2.00 | ≤0.045 | ≤0.035 | 23.0-28.0 | 19.0-23.0 | 4.0-5.0 | 1.0-2.0 | - | 余 |
N08367 | AL-6XN | ≤0.030 | ≤1.00 | ≤2.00 | ≤0.040 | ≤0.040 | 23.5-25.0 | 20.0-22.0 | 6.0-7.0 | ≤0.75 | 0.18-0.25 | 余 |
S31254 | 254SMo | ≤0.020 | ≤0.80 | ≤1.00 | ≤0.030 | ≤0.010 | 17.5-18.5 | 19.5-20.5 | 6.0-6.5 | 0.5-1.0 | 0.18-0.22 | 余 |
S32654 | 654SMo | ≤0.020 | ≤0.30 | 2.0-4.0 | ≤0.005 | ≤0.005 | 21.0-23.0 | 24.0-25.0 | 7.0-8.0 | 0.3-0.6 | 0.45-0.55 | 余 |
室温力学性能room-temperature mechanical property
ASTM UNS | 热处理温度 Temperature | 抗拉强度 Rm, min,MPa | 屈服强度 Rp0.2%,min,MPa | 伸长率 A50,min,% |
N08904 | ≥1100℃ | 490 | 220 | 35 |
N08367 | ≥1100℃ | 690 | 310 | 30 |
S31254 | ≥1150℃ | 675 | 310 | 35 |
S32654 | ≥1150℃ | 750 | 430 | 35 |
晶间腐蚀性能intergranular corrosion resistance
按ASTM G28A法（硫酸铁-硫酸法）测定的腐蚀速率
Intergranular corrosion resistance according to ASTM G28(ferric sulfate- sulfuric acid method)
钢种 grade | 状态 condition | 时间 (h) | 腐蚀速率 mm/a | 腐蚀深度 (μm) |
N08904 | 固溶solution | 120 | 0.35 | ≤50 |
按ASTM 262C法65%硫酸法测定的腐蚀速率
Intergranular corrosion resistance according to ASTM 262(65% HNO3)
钢种 grade | 状态 condition | 腐蚀速率corrosion rate(mm/a) | 平均腐蚀深度 corrosion rate(mm/a) | ||||
一 | 二 | 三 | 四 | 五 | |||
时间/48h | 时间/48h | 时间/48h | 时间/48h | 时间/48h | |||
N08904 | 固溶solution | 0.19 | 0.18 | 0.29 | 0.48 | 0.67 | 0.36 |
