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Data Sheet:

Corrosion Resisting Alloy S129

Chemical Composition Limits
Weight % C

Si

 Mn P+S max Cr Mo

Ni

 Others
S129 0.12 max 0.20 / 1.00 0.50 / 2.00 0.035P 0.025S 17.00 / 19.00 - 8.00 / 11.00 Ti 5 x C min
2S129 0.08 max 0.20 / 1.00 0.50 / 2.00 0.035P 0.025S 17.00/19.00 1.0 max 8.00 / 11.00 Ti 5 x C/0.80

Chemically similar British Specifications   BS.970 Pt4.
Weight % C

Si

 Mn P+S max Cr Mo

Ni

 Others

321S20

321S12 

(EN58 B/C)

 0.12 max 0.20 / 1.00 0.50 / 2.00

0.045 P

0.030 S

 17.00 / 19.00 - 8.00 / 11.00 5 x C / 0.90 (Ti)

Other Chemically similar Specifications
Weight % C

Si

 Mn P+S max Cr Mo Ni Others

AFNOR 

Z10 CNT 18-11

Z6 CNT 18-11

 0.12 max 1.00 max 2.00 max

0.040 P

0.030 S

 17.00 / 19.00 - 10.00 / 12.00 Ti 5 x C / 0.80

AISI 321/

SAE 30321

 0.80 max 1.00 max 2.00 max

0.045 P

0.030 S

17.00 /

19.00

 - 9.00 / 12.00

Ti 5 x C / min

AMS 5645

 0.80 max 1.00 max 2.00 max

0.040 P

0.030 S

 17.00 / 19.00 0.75 max 8.00 / 12.00

Ti 6 x C / 0.70

Cu 0.050 max
MIL-S-862B 321 0.80 max 1.00 max 2.00 max

0.045 P

0.030 S

 17.00 / 19.00 - 9.00 / 12.00

Ti 5 x C
MIL-S-27419 321 0.80 max 1.00 max 2.00 max

0.025 

17.00 / 20.00 - 9.00 / 13.00

Ti 0.75 max

Cu 0.70 max
WS 1.4541 X10CrNiTi18 9 1.00 max 1.00 max 2.00 max

0.045 P

0.030 S

 17.00 / 19.00 - 9.00 / 11.50

Ti 5 x C min

 

SPECIFICATIONS

S129 is available in Bar.

 

TYPICAL MECHANICAL PROPERTIES

S129
Treatment Tensile Strength Rm, N/MM2 Proof Stress Rp 0.2, N/MM2

Elongation in 5.65√Cross 

Sectional Area (%)

Hardness HB

max
Solution Treated 540 210 35 Black183  Bright255 

 

Disclaimer

Every effort is made to ensure that technical specifications are accurate. However, technical specifications included herein should be used as a guideline only. All specifications are subject to change without notice.

 

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