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Grade 07Cr17Ni7Al
China ISC S51770
Old Grade
Corresponding Standard GB /T 24588-2019
en:Stainless steel wires for spring
Classification Precipitation-Hardening Stainless Steel
Properties Elasticity Corrosion Resistance
Density 7.93 g/cm3
07Cr17Ni7Al Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni Al
Minimum Value - - - - - 16 6.5 0.75
Maximum Value 0.09 1 1 0.04 0.03 18 7.75 1.5
07Cr17Ni7Al Mechanical Properties
condition Heat Treatment or Condition
Tensile Strength
σb
Mpa
Cold Drawn Steel Wire; d < 0.2 Group C
≥1970
Cold Drawn Steel Wire; 0.2 ≤ d < 0.3 ≥1950
Cold Drawn Steel Wire; 0.3 ≤ d < 0.4 ≥1920
Cold Drawn Steel Wire; 0.4 ≤ d < 0.5 ≥1900
Cold Drawn Steel Wire; 0.5 ≤ d < 0.63 ≥1850
Cold Drawn Steel Wire; 0.63 ≤ d < 0.8 ≥1820
Cold Drawn Steel Wire; 0.8 ≤ d < 1 ≥1800
Cold Drawn Steel Wire; 1 ≤ d < 1.2 ≥1750
Cold Drawn Steel Wire; 1.2 ≤ d < 1.5 ≥1700
Cold Drawn Steel Wire; 1.5 ≤ d < 1.6 ≥1650
Cold Drawn Steel Wire; 1.6 ≤ d < 2 ≥1600
Cold Drawn Steel Wire; 2≤d<2.5 ≥1550
Cold Drawn Steel Wire; 2.5 ≤ d < 3 ≥1500
Cold Drawn Steel Wire; 3 ≤ d < 3.5 ≥1450
Cold Drawn Steel Wire; 3.5 ≤ d < 4 ≥1400
Cold Drawn Steel Wire; 4≤d<4.5 ≥1350
Cold Drawn Steel Wire; 5 ≤ d < 6 ≥1300
Cold Drawn Steel Wire; 6 ≤ d < 7 ≥1250
Cold Drawn Steel Wire; 7 ≤ d < 8 ≥1200
Cold Drawn Steel Wire; 8 ≤ d < 10 ≥1150
Sample; d < 0.2 Aging 2270~2610
Sample; 0.2 ≤ d < 0.3 Aging 2250~2580
Sample; 0.3 ≤ d < 0.4 Aging 2220~2550
Sample; 0.4 ≤ d < 0.5 Aging 2200~2530
Sample; 0.5 ≤ d < 0.63 Aging 2150~2470
Sample; 0.63 ≤ d < 0.8 Aging 2120~2440
Sample; 0.8 ≤ d < 1 Aging 2100~2410
Sample; 1 ≤ d < 1.2 Aging 2050~2350
Sample; 1.2 ≤ d < 1.5 Aging 2000~2300
Sample; 1.5 ≤ d < 1.6 Aging 1950~2240
1 Approximate Comparison Table
China Taiwan, China Japan South Korea United States International Organization for Standardization Germany France European Standard Russia
GB ISC CNS JIS KS ASTM UNS ISO DIN EN/DIN W-Nr. NF EN/NF EN Numerical Grade GOST
07Cr17Ni7Al
(0Cr17Ni7Al) 		S51770 631 SUS 631 STS 631 631 S17700 X7CrNiAl 17-7
2
(ISO 683-13-1986) 		X7CrNiAl 17-7 1.4568 Z8CNA 17-07 X7CrNiAl 17-7 1.4568 09Х17Н7Ю
2 Approximate Comparison Table
China Taiwan, China Japan South Korea United States International Organization for Standardization Germany France European Standard Russia
GB ISC CNS JIS KS ASTM UNS ISO DIN EN/DIN W-Nr. NF EN/NF EN Numerical Grade GOST
07Cr17Ni7Al
(0Cr17Ni7Al) 		S51770 631 SUS 631 STS 631 631 S17700 X7CrNiAl 17-7 X7CrNiAl 17-7 1.4568 Z8CNA 17-07 X7CrNiAl 17-7 1.4568 09Х17Н7Ю
07Cr17Ni7Al Corresponding Standards(Same grade name, different standards)
1 GB /T 20878-2007
07Cr17Ni7Al S51770 (0Cr17Ni7Al)
2 GB /T 1221-2007
07Cr17Ni7Al S51770 (0Cr17Ni7Al)
3 GB /T 1220-2007
07Cr17Ni7Al S51770 (0Cr17Ni7Al)
4 GB /T 4356-2016
07Cr17Ni7Al S51770
5 GB /T 4239-1991
07Cr17Ni7Al S51770 (0Cr17Ni7Al)
6 GB /T 3280-2015
07Cr17Ni7Al S51770
7 GB /T 4238-2015
07Cr17Ni7Al S51770 (0Cr17Ni7Al)
8 GB /T 4237-2015
07Cr17Ni7Al S51770
9 GB /T 24588-2019
07Cr17Ni7Al S51770 (0Cr17Ni7Al)
10 GJB 8268-2014
07Cr17Ni7Al S51770 (0Cr17Ni7Al)
11 GB /T 20878-2024
07Cr17Ni7Al S51770 (0Cr17Ni7Al)

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