17-7PH(SUS 631) 07Cr17Ni7Al/UNS S17700/AISI 631
Based on 18-8CrNi developed austenite-martensite precipitation
hardening stainless steel, also known as controlled phase change
stainless steel. After solid solution treatment for unstable
austenitic organization, has the good plastic toughness and
processability, after adjustment, the austenitic precipitation
carbide phenological composition change, again through martensitic
transformation processing, most organizations into toughness good
low-carbon tempered martensite, the state for the use of steel, has
a good medium temperature mechanical properties. Corrosion
resistance is better than ordinary martensitic stainless steel.
17-7PH stainless steel belt is a kind of cold hardening or
precipitation hardening with high elasticity, high fatigue
resistance of spring materials, 17-7PH elastic properties are very
good, not easy to appear elastic failure, after repeated use still
has original strength elasticity, so 17-7PH stainless steel belt is
generally used for some special requirements, Elastic requirements
of high components, especially in the production of dynamic spring
pieces, 17-7PH elastic efficiency than SUS301, 304 ordinary spring
stainless steel more than ten times higher.
17-7pH stainless steel plate in seawater for 6 years, the corrosion
rate of CH900 state is 3mm/ year, 300 degree pressurized water
reactor, cold working C state under 137MPA stress no stress
corrosion. Used within the elastic range of the product, the steel
plate can return to its original position after unloading, work
under alternating stress for a long time, has a high fatigue limit,
and good anti-creep and anti-relaxation properties. Shanghai
HAOSTEEL GROUP CO., LIMITED 17-7pH stainless steel plate can still
maintain enough elastic limit and good creep resistance under high
temperature conditions.
HAOSTEEL GROUP CO., LIMITED offers 17-7pH, PH15-7Mo heat treatment
cryogenic processing, 17-7pH heat treatment process is divided into
three categories: CH900,RH950,TH1050
HAOSTEEL GROUP CO., LIMITED can produce more than 30 different heat
treatment schemes to achieve the mechanical design requirements of
different products. The meaning represented by 17-7pH: PH is the
abbreviation of Precipitation hardening English (Precipitation
hardening), 17% of chromium content, and 7% of nickel content.
17-7pH chemical composition
Carbon (C) 0.09 or less, manganese (Mn) of 1.00 or less, nickel
(Ni) 6.50 ~ 7.75, silicon (Si) of 1.00 or less, phosphorus (P) of
0.035 or less,
Sulfur (S)≤0.030, Chromium (Cr)16.00 ~ 18.00, aluminum (Al)0.75 ~
1.50
17-7 ph features:
The mechanical properties of 17-7pH are particularly excellent.
17-7pH is a kind of high elastic stainless steel containing
aluminum AL as precipitation hardening phase. The chemical
composition of 17-7pH needs to be precisely controlled within a
reasonable range, so that RH950 and TH1050 can easily obtain better
mechanical properties. 17-7PH is a hardened stainless steel with
high strength, high hardness, fatigue resistance, excellent
corrosion resistance and die malleability. HAOSTEEL GROUP CO.,
LIMITED 17-7PH high performance stainless steel belt is very
suitable for making dynamic elastic parts, compared with ordinary
SUS301, 304 only suitable for static elastic parts, 17-7PH more
anti-fatigue characteristics.
17-7PH Application areas:
Used in aerospace, chemical, petrochemical, paper and metal
processing industry.
