OPERATING LIMITS FOR STEELS IN HYDROGEN SERVICE TO AVOID HTHA

Product Details

Units:	USMetric   US Metric
PH2 (kPa):
Temperature (℃):
Margin pH2 (kPa):
Margin T, (℃):
Calculate

Material	Nelson curve (℃)	D Margin
CS - welded, no PWHT:	249.7	283.7
CS - welded, PWHT:	302.8	235.3
CS - non-welded:	302.8	235.3
C-0.5Mo:	472.9	74.8
1.0Cr-0.5Mo:	555.1	-19.2
1.25Cr-0.5Mo:	599	-65.8
1.25Cr-1Mo:	626	-92.6
1.25Cr-1Mo-V:	655.7	-122.6
3Cr-1Mo:	655.7	-122.6
6Cr-0.5Mo:	683.4	-150.8

Footer