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ASTM-A-515 \ ASTM-A-516
 
BOILER QUALITY PLATES
ASTM-A-516
Elements
Composition %
Grade 55
[Grade 300]
Grade 60
[Grade 415]
Grade 65
[Grade 450]
Grade 70
[Grade 485]
Carbon, max*#:
1/2 in. [12.5mm] and under 0.18 0.21 0.24 0.27
Over 1/2 to 2 in. [12.5 to 50mm] incl 0.20 0.23 0.26 0.28
Over 2 to 4 in. [50 to 100mm] incl 0.22 0.25 0.28 0.30
Over 4 to 8 in. [100 to 200mm] incl 0.21 0.27 0.29 0.31
Over 8 in. [200mm] 0.26 0.27 0.29 0.31
Manganese, max#:
1/2 in. [12.5mm] and under
Heat Analysis 0.60-0.90 0.60-0.90^ 0.85-1.20 0.85-1.20
Product Analysis 0.50-0.98 0.55-0.98^ 0.79-1.30 0.79-1.30
Over 1/2 in. [12.5mm]
Heat Analysis 0.60-1.20 0.85-1.20 0.85-1.20 0.85-1.20
Product Analysis 0.50-1.30 0.79-1.30 0.79-1.30 0.79-1.30
Phosphorus, max*: 0.035 0.035 0.035 0.035
Sulphur, max*: 0.035 0.035 0.035 0.035
Silicon:
Heat Analysis 0.15-0.40 0.15-0.40 0.15-0.40 0.15-0.40
Product Analysis 0.13-0.45 0.13-0.45 0.13-0.45 0.13-0.45
Tensile Strength ksi [MPa]: 55-75
[380-515]
60-80
[415-550]
65-85
[450-585]
70-90
[485-620]
Yield Strength ksi [MPa]: 30 [205] 32 [220] 35 [240] 38 [260]
Elongation in 8 in. [200mm] min %: 23A 21A 19A 17A
Elongation in 2 in. [50mm] min %: 27A 25A 23A 21A
* Applies to both heat and product analyses

# For each reduction of 0.01 percentage point below the specified maximum for carbon, an increase of 0.06 percentage point above the specified maximum manganese is permitted, up to a maximum of 1.50% by heat analysis and 1.60% by product analysis

^ Grade 60 plates 1/2 in. [12.5mm] and under thickness may have 0.85-1.20% manganese on heat analysis and 0.79-1.30% manganese on product analysis

A Refer specification A20 / A20m.
 
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