Materials Grades


Special Quality Alloys holds a comprehensive range of pre-qualified bar stock and an extensive inventory of ingot and billet to facilitate the manufacturing of forged and machined parts in our key grades.


Nickel-based alloys

Commercial designations Specifications
Generic UNS ASTM BS Werkstoff AFNOR
API 6A 718 N07718 B637   2.4668 NC 19FeNb
Alloy 625 N06625 B446 B564 3076 NA21 2.4856 NC 22 DNb
Alloy 725 N07725 B805      
Alloy 716 N07716 B805      
Alloy 925 N09925        
Alloy 825 N08825 B425 B564 3076 NA16 2.4858 NC 21FeDU
Alloy 945/X N09945        
X750 N07750 B637   2.4669 NC 15 TNbA

Stainless steel

Commercial designations Specifications
Generic UNS ASTM BS Werkstoff AFNOR
17/4PH S17400 A564   1.4542  
F6NM S41500     1.4313  
410 S41000 A276/A565      
A286 S66286 A453/A638  HR51 1.4943  
Alloy50 S20910 A276/A479   1.3964  
Alloy60 S21800 A276/A479      
316 S31600 A182 F316   1.4404 Z7CDN18-12-03
304 S30400 A182 F304   1.4301 Z7CN18-09

Duplex

Commercial designations Specifications
Generic UNS ASTM NORSOK Werkstoff
F51 S31803 A182/A276 MDS D44 D47 1.4462

Super duplex

Commercial designations Specifications
Generic UNS ASTM NORSOK Werkstoff
F55 S32760 A182/A276 MDS D54 D57 1.4501
F53 S32750 A182/A276 MDS D54 D57 1.4410

Carbon & Alloy Steels

Commercial designations Specifications
Generic UNS US BS Werkstoff AFNOR
EN31 G52986 52100 535A99 1.3505 100C6
EN36A     655M13 1.5752 14NC12
EN34 G46150 4615 655M17    
4130 G41300 4130   1.7218 25CD4
4140 G41400 4140 709M40 1.7225 42CD4
8620 G86200 8620 805M20 1.6523 20NCD2
8630 G86300 8630   1.6545  
F22 K21590 A182F22      
F65   A694F65      
LF2 K03011 A350LF2      
4340 G43400 4340 817M40 1.6565  

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